Sample records for high-producing mbl2 genotypes

  1. High-producing MBL2 genotypes increase the risk of acute and chronic carditis in patients with history of rheumatic fever

    DEFF Research Database (Denmark)

    Schafranski, Marcelo Derbli; Pereira Ferrari, Lílian; Scherner, Daniela


    with a history of RF. Polymorphisms in exon 1 and in the X/Y promoter region of the MBL2 gene were determined by PCR-SSP in 149 patients with a history of RF and 147 controls. Genotypes associated with the high production of MBL (YA/YA and YA/XA) were more frequent in the patients with acute (26/35, 74...... patients presenting MBL2 genotypes related to the low production of MBL (10/14, 71% vs. 10/28, 36%; p=0.048, OR 0.22, 95% CI 0.05-0.89). We concluded that MBL2 genotypes associated with the high production of MBL seem to be involved in the pathogenesis of rheumatic carditis and its progression to CRHD....

  2. High-producing MBL2 genotypes increase the risk of acute and chronic carditis in patients with history of rheumatic fever

    DEFF Research Database (Denmark)

    Schafranski, MD; Pereira Ferrari, L; Scherner, D


    Rheumatic fever (RF) and its most severe sequela, chronic rheumatic heart disease (CRHD), are mediated by an abnormal immunological host response following a Streptococcus pyogenes oropharyngeal infection. Mannan-binding lectin (MBL), a collectin that activates complement, binds to N......-acetylglucosamine, a molecule present on the streptococcus cell wall and on human heart valves. As high levels of MBL and MBL2 associated genotypes have previously been seen to be associated with CRHD, we investigated the association between MBL2 polymorphisms and the presence of acute carditis and arthritis in patients...

  3. Extreme high prevalence of a defective mannose-binding lectin (MBL2 genotype in native South American West Andean populations.

    Directory of Open Access Journals (Sweden)

    José Raul Sandoval

    Full Text Available Mannose-binding lectin (MBL is one of the five recognition molecules in the lectin complement pathway. Common variant alleles in the promoter and structural regions of the human MBL gene (MBL2 influence the stability and serum concentration of the protein. Epidemiological studies have shown that MBL2 variant alleles are associated with susceptibility to and the course of different types of infectious and inflammatory conditions. However, it has been suggested that these alleles are maintained in different populations due to selected advantages for carriers. We investigated the MBL2 allelic variation in indigenous individuals from 12 different West Central South America localities spanning from the desert coast, high altitude Andean plates and the Amazon tropical forest within the territories of Peru (n = 249 (Departments of Loreto, Ucayali, Lambayeque, Junin, Ayacucho, Huancayo and Puno, and Ecuador (n = 182 (Region of Esmeraldas and Santo Domingo de los Colorados. The distribution of MBL2 genotypes among the populations showed that the defective variant LYPB haplotype was very common. It showed the highest frequencies in Puno (Taquile (0.80, Amantani (0.80 and Anapia (0.58 islander communities of the Lake Titicaca, but lower frequencies of 0.22 in Junin (Central Andean highland and Ucayali (Central Amazonian forest, as well as 0.27 and 0.24 in the Congoma and Cayapa/Chachis populations in the Amazonian forest in Ecuador were also observed. Our results suggest that the high prevalence of the MBL2 LYPB variant causing low levels of functional MBL in serum may mainly reflect a random distribution due to a population bottleneck in the founder populations.

  4. Extreme high prevalence of a defective mannose-binding lectin (MBL2) genotype in native South American West Andean populations. (United States)

    Sandoval, José Raul; Madsen, Hans O; De Stefano, Gianfranco; Descailleaux-Dulanto, Jaime; Velazquez-Reinoso, Margarita; Ñique, Cesar; Fujita, Ricardo; Garred, Peter


    Mannose-binding lectin (MBL) is one of the five recognition molecules in the lectin complement pathway. Common variant alleles in the promoter and structural regions of the human MBL gene (MBL2) influence the stability and serum concentration of the protein. Epidemiological studies have shown that MBL2 variant alleles are associated with susceptibility to and the course of different types of infectious and inflammatory conditions. However, it has been suggested that these alleles are maintained in different populations due to selected advantages for carriers. We investigated the MBL2 allelic variation in indigenous individuals from 12 different West Central South America localities spanning from the desert coast, high altitude Andean plates and the Amazon tropical forest within the territories of Peru (n = 249) (Departments of Loreto, Ucayali, Lambayeque, Junin, Ayacucho, Huancayo and Puno), and Ecuador (n = 182) (Region of Esmeraldas and Santo Domingo de los Colorados). The distribution of MBL2 genotypes among the populations showed that the defective variant LYPB haplotype was very common. It showed the highest frequencies in Puno (Taquile (0.80), Amantani (0.80) and Anapia (0.58) islander communities of the Lake Titicaca), but lower frequencies of 0.22 in Junin (Central Andean highland) and Ucayali (Central Amazonian forest), as well as 0.27 and 0.24 in the Congoma and Cayapa/Chachis populations in the Amazonian forest in Ecuador were also observed. Our results suggest that the high prevalence of the MBL2 LYPB variant causing low levels of functional MBL in serum may mainly reflect a random distribution due to a population bottleneck in the founder populations.

  5. MBL2 and Hepatitis C Virus Infection among Injection Drug Users

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    Edlin Brian R


    Full Text Available Abstract Background Genetic variations in MBL2 that reduce circulating levels and alter functional properties of the mannose binding lectin (MBL have been associated with many autoimmune and infectious diseases. We examined whether MBL2 variants influence the outcome of hepatitis C virus (HCV infection. Methods Participants were enrolled in the Urban Health Study of San Francisco Bay area injection drug users (IDU during 1998 through 2000. Study subjects who had a positive test for HCV antibody were eligible for the current study. Participants who were positive for HCV RNA were frequency matched to those who were negative for HCV RNA on the basis of ethnicity and duration of IDU. Genotyping was performed for 15 single nucleotide polymorphisms in MBL2. Statistical analyses of European American and African American participants were conducted separately. Results The analysis included 198 study subjects who were positive for HCV antibody, but negative for HCV RNA, and 654 IDUs who were positive for both antibody and virus. There was no significant association between any of the genetic variants that cause MBL deficiency and the presence of HCV RNA. Unexpectedly, the MBL2 -289X promoter genotype, which causes MBL deficiency, was over-represented among European Americans who were HCV RNA negative (OR = 1.65, 95% CI 1.05–2.58, although not among the African Americans. Conclusion This study found no association between genetic variants that cause MBL deficiency and the presence of HCV RNA. The observation that MBL2 -289X was associated with the absence of HCV RNA in European Americans requires validation.

  6. How does mother-to-child transmission of HIV differ among African populations? Lessons from MBL2 genetic variation in Zimbabweans. (United States)

    Mhandire, Kudakwashe; Pharo, Gavin; Kandawasvika, Gwendolene Q; Duri, Kerina; Swart, Marelize; Stray-Pedersen, Babill; Dandara, Collet


    Mannose binding lectin (MBL) is a pathogen pattern recognition protein involved in antimicrobial activities. Variation in MBL2 gene has been extensively implicated in differential outcomes of infectious diseases in studies conducted outside Africa, but virtually very little is known on the role of this candidate gene in the African continent. We investigated human genetic variations in MBL2 in a Zimbabwean pediatric population and their putative associations with HIV infection in perinatally exposed children. One hundred and four children aged 7 to 9 years comprising 68 perinatally exposed to HIV (32 who were born infected and 36 who were uninfected) and 36 unexposed controls were recruited. DNA samples were genotyped for MBL2 polymorphisms using PCR-RFLP and sequencing. HIV infected children had markedly variable and significantly lower mean height (p=0.03) and weight (p=0.005) when compared to the uninfected children. Using all samples, frequencies for MBL2 genetic variants for the Zimbabwean population were calculated. Twelve single nucleotide polymorphisms were observed and minor alleles occurred with the following frequencies: -550C>G (G: 0.02), -435G>A (A: 0.08), -428A>C (C: 0.39), -394A>G (A: 0.39), -328AGAGAA ins/del (AGAGAA ins: 0.44), -245G>A (A: 0.05), -221C>G (C: 0.12), -111A>T (T: 0.10), -70C>T (C: 0.46), +4C>T (C: 0.45), novel -595G>A (A: 0.02), and 170G>A (0.24). We found that the MBL2 +4T variant displayed a trend for association with reduced risk of HIV transmission from mother-to-child but the remaining vast majority of the genetic markers did not show a significant association. We conclude (1) the MBL2 gene is highly polymorphic in the Zimbabwean population, and (2) MBL2 genetic variation does not appear to play a major role in influencing the risk of mother-to-child HIV transmission in our study sample. These observations contest the hitherto significant role of this candidate gene for HIV transmission from mother-to-child in non

  7. A cost-effective melting temperature assay for the detection of single-nucleotide polymorphism in the MBL2 gene of HIV-1-infected children

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    Arraes L.C.


    Full Text Available We report a fast (less than 3 h and cost-effective melting temperature assay method for the detection of single-nucleotide polymorphisms in the MBL2 gene. The protocol, which is based on the Corbett Rotor Gene real time PCR platform and SYBR Green I chemistry, yielded, in the cohorts studied, sensitive (100% and specific (100% PCR amplification without the use of costly fluorophore-labeled probes or post-PCR manipulation. At the end of the PCR, the dissociation protocol included a slow heating from 60º to 95ºC in 0.2ºC steps, with an 8-s interval between steps. Melting curve profiles were obtained using the dissociation software of the Rotor Gene-3000 apparatus. Samples were analyzed in duplicate and in different PCR runs to test the reproducibility of this technique. No supplementary data handling is required to determine the MBL2 genotype. MBL2 genotyping performed on a cohort of 164 HIV-1-positive Brazilian children and 150 healthy controls, matched for age and sex and ethnic origin, yielded reproducible results confirmed by direct sequencing of the amplicon performed in blind. The three MBL2 variants (Arg52Cys, Gly54Asp, Gly57Glu were grouped together and called allele 0, while the combination of three wild-type alleles was called allele A. The frequency of the A/A homozygotes was significantly higher among healthy controls (0.68 than in HIV-infected children (0.55; P = 0.0234 and the frequency of MBL2 0/0 homozygotes was higher among HIV-1-infected children than healthy controls (P = 0.0296. The 0 allele was significantly more frequent among the 164 HIV-1-infected children (0.29 than among the 150 healthy controls (0.18; P = 0.0032. Our data confirm the association between the presence of the mutated MBL2 allele (allele 0 and HIV-1 infection in perinatally exposed children. Our results are in agreement with the literature data which indicate that the presence of the allele 0 confers a relative risk of 1.37 for HIV-1 infection through

  8. Gene polymorphisms and febrile neutropenia in acute leukemia--no association with IL-4, CCR-5, IL-1RA, but the MBL-2, ACE, and TLR-4 are associated with the disease in Turkish patients: a preliminary study. (United States)

    Pehlivan, Mustafa; Sahin, Handan Haydaroğlu; Ozdilli, Kurşat; Onay, Hüseyin; Ozcan, Ali; Ozkinay, Ferda; Pehlivan, Sacide


    The aim of this study was to investigate the mannose-binding lectin 2 (MBL-2), interleukin (IL)-4, Toll-like receptor 4 (TLR-4), angiotensin converting enzyme (ACE), chemokine receptor 5 (CCR-5), and IL-1 receptor antagonist (RA) gene polymorphisms (GPs) in acute leukemias (ALs) and to evaluate their roles in febrile neutropenia (FN) resulting from chemotherapy. The study included 60 AL patients hospitalized between the period of July 2001 and August 2006. Polymorphisms for the genes ACE(I/D), CCR-5, IL-1RA, MBL-2, TLR-4, and IL-4 were typed by polymerase chain reaction (PCR) and/or PCR-restriction fragment length polymerase. Genotype frequencies for these genes were compared in the patient and control groups. The relationships between the genotypes and the body distribution of infections, pathogens, the duration of neutropenia, and febrile episodes in AL patients were evaluated. No significant differences in either the genotype distribution or the allelic frequencies of TLR-4, IL-4, CCR-5, IL-1RN GPs were observed between patients and healthy controls. The AB/BB genotype (53.3%) in the MBL-2 gene was found to be significantly higher in the AL patients compared with control groups. There were correlations between the presence of MBL-2, TLR-4, and ACE polymorphisms and clinical parameters due to FN. Overall, bacteremia was more common in MBL BB and ACE DD. Gram-positive bacteremia was more common in ACE for ID versus DD genotype. Gram-negative bacteremia was more common for both the MBL-2 AB/BB genotype and TLR-4 AG genotype. Median durations of febrile episodes were significantly shorter in ACE DD and MBL AB/BB. Although TLR-4, ACE, and MBL-2 GPs have been extensively investigated in different clinical pictures, this is the first study to evaluate the role of these polymorphisms in the genetic etiopathogenesis of FN in patients with ALs. As a conclusion, TLR-4, ACE, and MBL-2 genes might play roles in the genetic etiopathogenesis of FN in patients with ALs.

  9. Genotyping of mannose-binding lectin (MBL2) codon 54 and ...

    African Journals Online (AJOL)

    Rabah M. Shawky


    Nov 17, 2013 ... ing attachment, ingestion and killing of opsonized pathogens by phagocytes [5] ..... pneumonia and culture-proven sepsis during the first month of life [26]. ..... variation in the serum concentration of mannan-binding protein. Acta Paediatr ... phase reactant in adults with community-acquired pneumococcal.

  10. Association of MBL2 Gene Polymorphism with Dental Caries in Saudi Children. (United States)

    Alyousef, Yousef M; Borgio, J Francis; AbdulAzeez, Sayed; Al-Masoud, Naif; Al-Ali, Ali A; Al-Shwaimi, Emad; Al-Ali, Amein K


    The high prevalence of dental caries in children worldwide is a major oral health problem which requires early intervention. Dental caries is mainly caused by the action of acids produced by bacteria in addition to many other factors. Recent genetic studies have reported that a number of genes are associated with the susceptibility to dental caries. The majority of these genes are associated with inflammation, increased susceptibility to infection, and dentine matrix formation. Using the TaqMan assay and direct DNA sequencing, the prevalence of 6 single-nucleotide polymorphisms (SNPs) in MMP9, MBL2, MMP2, and TIMP2 genes was determined in 102 children with caries and in 100 age-matched caries-free controls. Out of the 6 SNPs tested in the 4 selected genes, only rs11003125 in the MBL2 gene was shown to be associated with a high prevalence of caries in our cohort. In addition, haplotype analysis of the 6 SNPs tested revealed that certain haplotypes, namely GT of rs11003125G and rs7501477T and GT of rs7096206G and rs7501477T, were found to be associated with a high prevalence of dental caries in our cohort, while haplotype AG of rs17576A and rs7501477G was found to have a protective effect against dental caries. In conclusion, the data indicate that rs11003125 in the MBL2 gene was shown to be associated with a high prevalence of caries in our cohort, and 2 haplotypes are also involved in the increased susceptibility to dental caries. © 2016 S. Karger AG, Basel.

  11. Mannose-binding lectin 2 (Mbl2 gene polymorphisms are related to protein plasma levels, but not to heart disease and infection by Chlamydia

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    M.A.F. Queiroz

    Full Text Available The presence of the single nucleotide polymorphisms in exon 1 of the mannose-binding lectin 2 (MBL2 gene was evaluated in a sample of 159 patients undergoing coronary artery bypass surgery (71 patients undergoing valve replacement surgery and 300 control subjects to investigate a possible association between polymorphisms and heart disease with Chlamydia infection. The identification of the alleles B and D was performed using real time polymerase chain reaction (PCR and of the allele C was accomplished through PCR assays followed by digestion with the restriction enzyme. The comparative analysis of allelic and genotypic frequencies between the three groups did not reveal any significant difference, even when related to previous Chlamydia infection. Variations in the MBL plasma levels were influenced by the presence of polymorphisms, being significantly higher in the group of cardiac patients, but without representing a risk for the disease. The results showed that despite MBL2 gene polymorphisms being associated with the protein plasma levels, the polymorphisms were not enough to predict the development of heart disease, regardless of infection with both species of Chlamydia.

  12. Mannose-binding lectin (MBL2) and ficolin-2 (FCN2) polymorphisms in patients on peritoneal dialysis with staphylococcal peritonitis

    NARCIS (Netherlands)

    Meijvis, Sabine C. A.; Herpers, Bjorn L.; Endeman, Henrik; de Jong, Ben; van Hannen, Erik; van Velzen-Blad, Heleen; Krediet, Raymond T.; Struijk, Dirk G.; Biesma, Douwe H.; Bos, Willem Jan W.

    Background. Mannose-binding lectin (MBL) and ficolin-2 (FCN) are activators of the lectin pathway of complement and act as primary defences against infection. Single-nucleotide polymorphisms (SNPs) in the MBL2 and FCN2 genes influence the functionality of the proteins. Both proteins are capable of

  13. Mannose-binding lectin gene, MBL2, polymorphisms are not associated with susceptibility to invasive pneumococcal disease in children

    DEFF Research Database (Denmark)

    Lundbo, Lene Fogt; Harboe, Zitta Barrella; Clausen, Louise Nygaard


    BACKGROUND: Most children are transiently colonized with Streptococcus pneumoniae, but very few develop invasive pneumococcal disease (IPD). Host genetic variation of innate immunity may predispose to IPD. We investigated the effect of genetic variation in the mannose-binding lectin gene, MBL2......, on susceptibility and disease severity of IPD in previously healthy children aged

  14. Mannan-binding lectin MBL2 gene polymorphism in chronic hepatitis C: association with the severity of liver fibrosis and response to interferon therapy

    DEFF Research Database (Denmark)

    Alves Pedroso, ML; Boldt, AB; Pereira-Ferrari, L


    Hepatitis C virus (HCV) is a major cause of hepatic disease and of liver transplantation worldwide. Mannan-binding lectin (MBL), encoded by the MBL2 gene, can have an important role as an opsonin and complement activating molecule in HCV persistence and liver injury. We assessed the MBL2...

  15. Extreme High Prevalence of a Defective Mannose-Binding Lectin (MBL2) Genotype in Native South American West Andean Populations

    DEFF Research Database (Denmark)

    Sandoval, José Raul; Madsen, Hans O; De Stefano, Gianfranco


    communities of the Lake Titicaca), but lower frequencies of 0.22 in Junin (Central Andean highland) and Ucayali (Central Amazonian forest), as well as 0.27 and 0.24 in the Congoma and Cayapa/Chachis populations in the Amazonian forest in Ecuador were also observed. Our results suggest that the high prevalence...

  16. Mannose-Binding Lectin Gene, MBL2, Polymorphisms Do Not Increase Susceptibility to Invasive Meningococcal Disease in a Population of Danish Children

    DEFF Research Database (Denmark)

    Lundbo, Lene F; Sørensen, Henrik T.; Clausen, Louise Nygaard


    of the innate immune system may predispose to invasive meningococcal disease (IMD). In this study, we investigated the effect of genetic variation in the mannose-binding lectin gene, MBL2, and its promoter on susceptibility to IMD and IMD-associated mortality among children. Methods.  Children (...Background.  Neisseria meningitidis is the cause of meningococcal bacteremia and meningitis, and nasopharyngeal colonization with this pathogen is common. The incidence of invasive disease is highest in infants, whereas adolescents more often are carriers. Altered regulation or dysfunction...

  17. Construction of acetoin high-producing Bacillus subtilis strain

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    Yanjun Tian


    Full Text Available This paper describes the construction and selection of a high-producing mutant, Bacillus subtilis HB-32, with enhanced acetoin yield and productivity. The mutant was obtained by the protoplast fusion of a Bacillus subtilis mutant TH-49 (Val− producing acetoin and Bacillus licheniformis AD-30 producing α-acetolactate decarboxylase, with the fusogen polyethylene glycol and after the regeneration and selection, etc. of the fusant. The acetoin production reached 49.64 g/L, which is an increase of 61.8% compared to that of B. subtilis strain TH-49. Random amplified polymorphic DNA analysis was performed to determine the mutagenic and protoplast fusion effects and the genomic changes in the acetoin high-producing strain compared to the parent strains at the molecular level. The constructed strain was shown to be promising for large-scale acetoin production. Future studies should focus on the application of the mutant strain in practice.

  18. Desmanthus GENOTYPES

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    Full Text Available Desmanthus is a genus of forage legumes with potential to improve pastures and livestock produc-tion on clay soils of dry tropical and subtropical regions such as the existing in Brazil and Australia. Despite this patterns of natural or enforced after-ripening of Desmanthus seeds have not been well established. Four year old seed banks of nine Desmanthus genotypes at James Cook University were accessed for their patterns of seed softe-ning in response to a range of temperatures. Persistent seed banks were found to exist under all of the studied ge-notypes. The largest seeds banks were found in the genotypes CPI 78373 and CPI 78382 and the smallest in the genotypes CPI’s 37143, 67643, and 83563. An increase in the percentage of softened seeds was correlated with higher temperatures, in two patterns of response: in some accessions seeds were not significantly affected by tempe-ratures below 80º C; and in others, seeds become soft when temperature rose to as little as 60 ºC. At 80 °C the heat started to depress germination. High seed production of Desmanthus associated with dependence of seeds on eleva-ted temperatures to softening can be a very important strategy for plants to survive in dry tropical regions.

  19. The relationship between serum adiponectin and postpartum luteal activity in high-producing dairy cows. (United States)

    Kafi, Mojtaba; Tamadon, Amin; Saeb, Mehdi


    The aims of the present study were to initially determine the pattern of serum adiponectin concentrations during a normal estrous cycle in high-producing postpartum dairy cows and then evaluate the relationship between the serum concentrations of adiponectin and insulin with the commencement of postpartum luteal activity and ovarian activities in clinically healthy high-producing Holstein dairy cows. During a normal estrous cycle of cows (n = 6), serum adiponectin concentrations gradually decreased (P Cows with higher peak of milk yield had lower serum adiponectin concentrations by week 7 postpartum (P = 0.01). Serum adiponectin and insulin concentrations in cows with different postpartum luteal activity (based on the progesterone profile) were evaluated using the following class of cows: normal (≤45 days, n = 11) and delayed (>45 days, n = 11) commencement of luteal activity (C-LA) and four different profiles of normal luteal activity (NLA, n = 5), prolonged luteal phase (n = 6), delayed first ovulation (n = 6), and anovulation (AOV, n = 5). Serum adiponectin concentrations decreased gradually by week 3 postpartum in NLA and then increased; whereas in AOV and delayed first ovulation, they were decreased after week 3 postpartum (P cows was more than that of NLA cows. Insulin concentrations were almost maintained at a stable level in NLA cows (P > 0.05), whereas they increased in the other groups (P cows with C-LA greater than 45 days decreased more than those with C-LA 45 days or less after week 3 postpartum (P = 0.002). Serum adiponectin concentrations at week 7 postpartum were lower in delayed C-LA (P = 0.01). Milk yield in cows with C-LA greater than 45 days increased more than cows with C-LA 45 days or less postpartum (P = 0.002). Insulin concentrations increased relatively in parallel from weeks 1 to 7 postpartum in cows either with C-LA greater than 45 or with C-LA 45 days or less. We showed for the first time the profile of serum adiponectin concentrations

  20. Prevalence of lameness in high-producing holstein cows housed in freestall barns in Minnesota. (United States)

    Espejo, L A; Endres, M I; Salfer, J A


    A cross-sectional study was conducted to estimate the prevalence of clinical lameness in high-producing Holstein cows housed in 50 freestall barns in Minnesota during summer. Locomotion and body condition scoring were performed on a total of 5,626 cows in 53 high-production groups. Cow records were collected from the nearest Dairy Herd Improvement Association test date, and herd characteristics were collected at the time of the visit. The mean prevalence of clinical lameness (proportion of cows with locomotion score >or=3 on a 1-to-5 scale, where 1 = normal and 5 = severely lame), and its association with lactation number, month of lactation, body condition score, and type of stall surface were evaluated. The mean prevalence of clinical lameness was 24.6%, which was 3.1 times greater, on average, than the prevalence estimated by the herd managers on each farm. The prevalence of lameness in first-lactation cows was 12.8% and prevalence increased on average at a rate of 8 percentage units per lactation. There was no association between the mean prevalence of clinical lameness and month of lactation (for months 1 to 10). Underconditioned cows had a higher prevalence of clinical lameness than normal or overconditioned cows. The prevalence of lameness was lower in freestall herds with sand stalls (17.1%) than in freestall herds with mattress stall surfaces (27.9%). Data indicate that the best 10th percentile of dairy farms had a mean prevalence of lameness of 5.4% with only 1.47% of cows with locomotion score = 4 and no cows with locomotion score = 5.

  1. APOE Genotyping, Cardiovascular Disease (United States)

    ... Resources For Health Professionals Subscribe Search APOE Genotyping, Cardiovascular Disease Send Us Your Feedback Choose Topic At a ... help understand the role of genetic factors in cardiovascular disease . However, the testing is sometimes used in clinical ...

  2. Radiosensitivity of fingermillet genotypes

    Energy Technology Data Exchange (ETDEWEB)

    Raveendran, T S; Nagarajan, C; Appadurai, R; Prasad, M N; Sundaresan, N [Tamil Nadu Agricultural Univ., Coimbatore (India)


    Varietal differences in radiosensitivity were observed in a study involving 4 genotypes of fingermillet (Eleusine coracana (Linn.) Gaertn.) subjected to gamma-irradiation. Harder seeds were found to tolerate a higher dose of the mutagen.

  3. Gene expression patterns in the ventral tegmental area relate to oestrus behaviour in high-producing dairy cows

    NARCIS (Netherlands)

    Wyszynska-Koko, J.; Wit, de A.A.C.; Beerda, B.; Veerkamp, R.F.; Pas, te M.F.W.


    Reduced oestrus behaviour expression or its absence (silent oestrus) results in subfertility in high-producing dairy cows. Insight into the genomic regulation of oestrus behaviour is likely to help alleviate reproduction problems. Here, gene expression was recorded in the ventral tegmental area

  4. Maternal ve fetal MBL2 genotiplerinin preterm doğumlarla ilişkisi


    Taneri, Ayşe


    Yenidoğan döneminde, immün sistemin tam olarak gelismemesine bağlı karsılasılan komplikasyonlara ek olarak, yenidoğanın “prematüre” olması prenatal mortalite ve morbidite hızını arttıran baslıca faktördür. Görülme sıklığının %9 olması nedeni ile, günümüz perinatal tıbbının çözmeye çalıstığı ve çevresel, tıbbi ve kalıtsal faktörlerin rol oynadığı çoklu değisimlere bağlı bir yenidoğan sorunudur. Patogenezi aydınlatmaya yönelik yapılan çalısmalarda inflamasyonun gestasyonel sür...

  5. Common genotypes of hepatitis B virus

    International Nuclear Information System (INIS)

    Idrees, M.; Khan, S.; Riazuddin, S.


    Objective: To find out the frequency of common genotypes of hepatitis-B virus (HBV). Subjects and Methods: HBV genotypes were determined in 112 HBV DNA positive sera by a simple and precise molecular genotyping system base on PCR using type-specific primers for the determination of genotypes of HBV A through H. Results: Four genotypes (A,B,C and D) out of total eight reported genotypes so far were identified. Genotypes A, B and C were predominant. HBV genotype C was the most predominant in this collection, appearing in 46 samples (41.7%). However, the genotypes of a total of 5 (4.46%) samples could not be determined with the present genotyping system. Mixed genotypes were seen in 8(7.14% HBV) isolates. Five of these were infected with genotypes A/D whereas two were with genotypes C/D. One patient was infected with 4 genotypes (A/B/C/D). Genotype A (68%) was predominant in Sindh genotype C was most predominant in North West Frontier Province (NWFP) (68.96) whereas genotype C and B were dominant in Punjab (39.65% and 25.86% respectively). Conclusion: All the four common genotypes of HBV found worldwide (A,B,C and D) were isolated. Genotype C is the predominant Genotypes B and C are predominant in Punjab and N.W.F.P. whereas genotype A is predominant in Sindh. (author)

  6. A hybrid approach identifies metabolic signatures of high-producers for chinese hamster ovary clone selection and process optimization. (United States)

    Popp, Oliver; Müller, Dirk; Didzus, Katharina; Paul, Wolfgang; Lipsmeier, Florian; Kirchner, Florian; Niklas, Jens; Mauch, Klaus; Beaucamp, Nicola


    In-depth characterization of high-producer cell lines and bioprocesses is vital to ensure robust and consistent production of recombinant therapeutic proteins in high quantity and quality for clinical applications. This requires applying appropriate methods during bioprocess development to enable meaningful characterization of CHO clones and processes. Here, we present a novel hybrid approach for supporting comprehensive characterization of metabolic clone performance. The approach combines metabolite profiling with multivariate data analysis and fluxomics to enable a data-driven mechanistic analysis of key metabolic traits associated with desired cell phenotypes. We applied the methodology to quantify and compare metabolic performance in a set of 10 recombinant CHO-K1 producer clones and a host cell line. The comprehensive characterization enabled us to derive an extended set of clone performance criteria that not only captured growth and product formation, but also incorporated information on intracellular clone physiology and on metabolic changes during the process. These criteria served to establish a quantitative clone ranking and allowed us to identify metabolic differences between high-producing CHO-K1 clones yielding comparably high product titers. Through multivariate data analysis of the combined metabolite and flux data we uncovered common metabolic traits characteristic of high-producer clones in the screening setup. This included high intracellular rates of glutamine synthesis, low cysteine uptake, reduced excretion of aspartate and glutamate, and low intracellular degradation rates of branched-chain amino acids and of histidine. Finally, the above approach was integrated into a workflow that enables standardized high-content selection of CHO producer clones in a high-throughput fashion. In conclusion, the combination of quantitative metabolite profiling, multivariate data analysis, and mechanistic network model simulations can identify metabolic

  7. HBV genotypic variability in Cuba.

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    Carmen L Loureiro

    Full Text Available The genetic diversity of HBV in human population is often a reflection of its genetic admixture. The aim of this study was to explore the genotypic diversity of HBV in Cuba. The S genomic region of Cuban HBV isolates was sequenced and for selected isolates the complete genome or precore-core sequence was analyzed. The most frequent genotype was A (167/250, 67%, mainly A2 (149, 60% but also A1 and one A4. A total of 77 isolates were classified as genotype D (31%, with co-circulation of several subgenotypes (56 D4, 2 D1, 5 D2, 7 D3/6 and 7 D7. Three isolates belonged to genotype E, two to H and one to B3. Complete genome sequence analysis of selected isolates confirmed the phylogenetic analysis performed with the S region. Mutations or polymorphisms in precore region were more common among genotype D compared to genotype A isolates. The HBV genotypic distribution in this Caribbean island correlates with the Y lineage genetic background of the population, where a European and African origin prevails. HBV genotypes E, B3 and H isolates might represent more recent introductions.

  8. HBV Genotypic Variability in Cuba (United States)

    Loureiro, Carmen L.; Aguilar, Julio C.; Aguiar, Jorge; Muzio, Verena; Pentón, Eduardo; Garcia, Daymir; Guillen, Gerardo; Pujol, Flor H.


    The genetic diversity of HBV in human population is often a reflection of its genetic admixture. The aim of this study was to explore the genotypic diversity of HBV in Cuba. The S genomic region of Cuban HBV isolates was sequenced and for selected isolates the complete genome or precore-core sequence was analyzed. The most frequent genotype was A (167/250, 67%), mainly A2 (149, 60%) but also A1 and one A4. A total of 77 isolates were classified as genotype D (31%), with co-circulation of several subgenotypes (56 D4, 2 D1, 5 D2, 7 D3/6 and 7 D7). Three isolates belonged to genotype E, two to H and one to B3. Complete genome sequence analysis of selected isolates confirmed the phylogenetic analysis performed with the S region. Mutations or polymorphisms in precore region were more common among genotype D compared to genotype A isolates. The HBV genotypic distribution in this Caribbean island correlates with the Y lineage genetic background of the population, where a European and African origin prevails. HBV genotypes E, B3 and H isolates might represent more recent introductions. PMID:25742179

  9. Metabolic profiles in five high-producing Swedish dairy herds with a history of abomasal displacement and ketosis

    Directory of Open Access Journals (Sweden)

    Stengärde Lena


    Full Text Available Abstract Background Body condition score and blood profiles have been used to monitor management and herd health in dairy cows. The aim of this study was to examine BCS and extended metabolic profiles, reflecting both energy metabolism and liver status around calving in high-producing herds with a high incidence of abomasal displacement and ketosis and to evaluate if such profiles can be used at herd level to pinpoint specific herd problems. Methods Body condition score and metabolic profiles around calving in five high-producing herds with high incidences of abomasal displacement and ketosis were assessed using linear mixed models (94 cows, 326 examinations. Cows were examined and blood sampled every three weeks from four weeks ante partum (ap to nine weeks postpartum (pp. Blood parameters studied were glucose, fructosamine, non-esterified fatty acids (NEFA, insulin, β-hydroxybutyrate, aspartate aminotransferase, glutamate dehydrogenase, haptoglobin and cholesterol. Results All herds had overconditioned dry cows that lost body condition substantially the first 4–6 weeks pp. Two herds had elevated levels of NEFA ap and three herds had elevated levels pp. One herd had low levels of insulin ap and low levels of cholesterol pp. Haptoglobin was detected pp in all herds and its usefulness is discussed. Conclusion NEFA was the parameter that most closely reflected the body condition losses while these losses were not seen in glucose and fructosamine levels. Insulin and cholesterol were potentially useful in herd profiles but need further investigation. Increased glutamate dehydrogenase suggested liver cell damage in all herds.

  10. Metabolic profiles in five high-producing Swedish dairy herds with a history of abomasal displacement and ketosis (United States)

    Stengärde, Lena; Tråvén, Madeleine; Emanuelson, Ulf; Holtenius, Kjell; Hultgren, Jan; Niskanen, Rauni


    Background Body condition score and blood profiles have been used to monitor management and herd health in dairy cows. The aim of this study was to examine BCS and extended metabolic profiles, reflecting both energy metabolism and liver status around calving in high-producing herds with a high incidence of abomasal displacement and ketosis and to evaluate if such profiles can be used at herd level to pinpoint specific herd problems. Methods Body condition score and metabolic profiles around calving in five high-producing herds with high incidences of abomasal displacement and ketosis were assessed using linear mixed models (94 cows, 326 examinations). Cows were examined and blood sampled every three weeks from four weeks ante partum (ap) to nine weeks postpartum (pp). Blood parameters studied were glucose, fructosamine, non-esterified fatty acids (NEFA), insulin, β-hydroxybutyrate, aspartate aminotransferase, glutamate dehydrogenase, haptoglobin and cholesterol. Results All herds had overconditioned dry cows that lost body condition substantially the first 4–6 weeks pp. Two herds had elevated levels of NEFA ap and three herds had elevated levels pp. One herd had low levels of insulin ap and low levels of cholesterol pp. Haptoglobin was detected pp in all herds and its usefulness is discussed. Conclusion NEFA was the parameter that most closely reflected the body condition losses while these losses were not seen in glucose and fructosamine levels. Insulin and cholesterol were potentially useful in herd profiles but need further investigation. Increased glutamate dehydrogenase suggested liver cell damage in all herds. PMID:18687108

  11. Effect of human chorionic gonadotropin on luteal function and reproductive performance of high-producing lactating Holstein dairy cows. (United States)

    Santos, J E; Thatcher, W W; Pool, L; Overton, M W


    The objectives were to evaluate effects of human chorionic gonadotropin (hCG) (3,300 IU i.m.) administered on d 5 after AI on CL number, plasma progesterone concentration, conception rate, and pregnancy loss in high-producing dairy cows. Following the synchronization of estrus and AI, 406 cows were injected with either hCG or saline on d 5 after AI in a randomized complete block design. Blood sampling and ovarian ultrasonography were conducted once between d 11 and 16 after AI. Pregnancy diagnoses were performed on d 28 by ultrasonography and on d 45 and 90 after AI by rectal palpation. Treatment with hCG on d 5 resulted in 86.2% of the cows with more than one CL compared with 23.2% in controls. Plasma progesterone concentrations were increased by 5.0 ng/mL in hCG-treated cows. The presence of more than one CL increased progesterone concentration in hCG-treated cows but not in controls. Conception rates were higher for hCG-treated cows on d 28 (45.8 > 38.7%), 45 (40.4 > 36.3%), and 90 (38.4 > 31.9%) after AI. Treatment with hCG improved conception rate in cows losing body condition between AI and d 28 after Al. Pregnancy losses were similar between treatment groups. Treatment with hCG on d 5 after AI induces accessory CL, enhances plasma progesterone concentration, and improves conception rate of high-producing dairy cows.

  12. Echinococcus granulosus genotypes in Iran (United States)

    Sharafi, Seyedeh Maryam; Rostami-Nejad, Mohammad; Moazeni, Mohammad; Yousefi, Morteza; Saneie, Behnam; Hosseini-Safa, Ahmad


    Hydatidosis, caused by Echinococcus granulosus is one of the most important zoonotic diseases, throughout most parts of the world. Hydatidosis is endemic in Iran and responsible for approximately 1% of admission to surgical wards. There are extensive genetic variations within E. granulosus and 10 different genotypes (G1–G10) within this parasite have been reported. Identification of strains is important for improvement of control and prevention of the disease. No new review article presented the situation of Echinococcus granulosus genotypes in Iran in the recent years; therefore in this paper we reviewed the different studies regarding Echinococcus granulosus genotypes in Iran. PMID:24834298

  13. Selection and protein sds-page identification of a new high-producing polysaccharide strain of Spirulina platensis

    International Nuclear Information System (INIS)

    Wang Zhiping; Liu Yanhui


    The relationship between anti-radiation capacity and polysaccharide contents of ten Spirulina platensis strains were studied. The results showed that the correlation coefficient between 60 Co γ-ray half-lethal dose (LD 50 ) and polysaccharide contents of the 10 strains was 0.9873. After the single cells or spheroplasts of Sp-08 were treated by 0.6%EMS and 2.4 kGy 60 Co γ-ray irradiation, four morphological mutant named Sp-08A, Sp-08B, Sp-08C and Sp-08D, which could endure about 7.0 kGy γ-ray irradiation, were obtained. The polysaccharide contents of Sp-08A, Sp-08B, Sp-08C and Sp-08D, were 32.8%, 17.3%, 3.4% and 42.3% higher than that of their parent Sp-08, respectively. The results of protein SDS-PAGE analysis showed that the heredity of Sp-08A, Sp-08C and Sp-08D were mutated. Therefore, Sp-08A was a perfect high-producing polysaccharide strain with excellent characteristics of morphology and growth. Now, Sp-08A is applied in mass cultivation and industrialization. (authors)

  14. Effects of Prepartum Monensin Feeding on Energy Metabolism and Reproductive Performance of Postpartum High-Producing Holstein Dairy Cows

    Directory of Open Access Journals (Sweden)

    Mahmood Changizi Mohammadi, Abbas Rowshan Ghasrodashti1, Amin Tamadon2,3 and Mohammad Amin Behzadi4*


    Full Text Available This study was designed to determine the effects of monensin in preparturient diet on postpartum milk production, energy metabolism, and reproductive performance of Holstein dairy cows. Forty Holstein dairy cows on close-up period were randomly divided into monensin treated (300 mg/day in close-up ration, top dress and control groups. Body condition score (BCS was estimated three weeks before and three weeks after calving. Milk production and milk fat percentage were recorded in both groups within 3 weeks postpartum. Blood samples were collected from five randomly selected cows of each group three weeks after calving. Serum concentrations of insulin like growth factor-I (IGF-I, insulin, glucose, and beta-hydroxybutyrate (BHBA were measured. Calving to the first observed estrus interval and calving to conception interval were compared between two groups. The results of the experiment showed that loss of BCS (P=0.3, increase of milk production (P=0.9, and milk fat percentage (P>0.05 were not significantly different between two groups during the period of study. In addition, mean serum glucose concentration (P=0.001 and serum insulin concentration (P=0.01 in monensin group were significantly higher than control cows in the first week postpartum. Moreover, serum BHBA concentration did not significantly change in monensin group. Serum IGF-I concentration in monensin group was significantly higher than control group in three weeks postpartum (P<0.01. The present study indicated that monensin treatment decreased calving to the first observed estrus interval (P=0.05 and calving to conception interval (P=0.002. In conclusion, supplementing the close-up ration can increase postpartum serum IGF-I concentration and prevent the increase of serum BHBA concentration. These may result in enhancement reproductive performance of high-producing dairy cows.

  15. Melatonin treatment at dry-off improves reproductive performance postpartum in high-producing dairy cows under heat stress conditions. (United States)

    Garcia-Ispierto, I; Abdelfatah, A; López-Gatius, F


    The aim of this study was to determine the effect of melatonin treatment during the early dry-off period on subsequent reproductive performance and milk production in high-producing dairy cows under heat stress conditions. In experiment I, addressing the pharmacokinetics of melatonin treatment in lactating dairy cows, doses of untreated, 3, 6, 9 or 12 implants/animal (18-mg melatonin each implant) were given as subcutaneous implants on gestation day 120-20 multiparous lactating dairy cows (four cows/dose group). Experiment II was performed during the warm season on 25 heifers and 114 high milk-producing Holstein-Friesian cows. Animals were randomly assigned to a control (C) or melatonin group (M). Animals in the M group received nine implants (heifers) or 12 (cows) of melatonin on day 220 of gestation. In experiment I, cows in the 12 implants group showed a higher maximum melatonin concentration (Cmax ) and area under the concentration curve from treatment day 0 to day 49 (AUC0-49d ) than those in the remaining groups, among which there were no significant differences in this variable. In experiment II, the likelihood of repeat breeding syndrome (pregnancy loss (first trimester) were 0.36 and 0.19 times lower in treated than control animals, respectively. Plasma prolactin levels decreased significantly (p = 0.01) after melatonin treatment and recovered during the postpartum compared to control cows. No significant effects on milk production were observed in the subsequent lactation. Significant differences in days open between groups (means 123 ± 71.9 and 103 ± 43, respectively, for C and M; p = 0.02) were registered. In conclusion, melatonin treatment in the early dry-off period improves the reproductive performance of dairy cattle, reducing the number of days open, repeat breeding syndrome and pregnancy loss. © 2012 Blackwell Verlag GmbH.

  16. Transforming microbial genotyping: a robotic pipeline for genotyping bacterial strains.

    Directory of Open Access Journals (Sweden)

    Brian O'Farrell

    Full Text Available Microbial genotyping increasingly deals with large numbers of samples, and data are commonly evaluated by unstructured approaches, such as spread-sheets. The efficiency, reliability and throughput of genotyping would benefit from the automation of manual manipulations within the context of sophisticated data storage. We developed a medium- throughput genotyping pipeline for MultiLocus Sequence Typing (MLST of bacterial pathogens. This pipeline was implemented through a combination of four automated liquid handling systems, a Laboratory Information Management System (LIMS consisting of a variety of dedicated commercial operating systems and programs, including a Sample Management System, plus numerous Python scripts. All tubes and microwell racks were bar-coded and their locations and status were recorded in the LIMS. We also created a hierarchical set of items that could be used to represent bacterial species, their products and experiments. The LIMS allowed reliable, semi-automated, traceable bacterial genotyping from initial single colony isolation and sub-cultivation through DNA extraction and normalization to PCRs, sequencing and MLST sequence trace evaluation. We also describe robotic sequencing to facilitate cherrypicking of sequence dropouts. This pipeline is user-friendly, with a throughput of 96 strains within 10 working days at a total cost of 200,000 items were processed by two to three people. Our sophisticated automated pipeline can be implemented by a small microbiology group without extensive external support, and provides a general framework for semi-automated bacterial genotyping of large numbers of samples at low cost.

  17. Effects of a progesterone-based oestrous synchronization protocol in 51- to 57-day postpartum high-producing dairy cows. (United States)

    Garcia-Ispierto, I; López-Gatius, F; Bech-Sàbat, G; Yániz, J L; Angulo, E; Maris, C; Floc'h, S; Martino, A


    The aim of this study was to investigate the effect of applying a progesterone-based oestrous synchronization protocol at 51-57 days postpartum in high-producing dairy cows. The data analysed were derived from 1345 lactating cows. Cows between 51 and 57 days postpartum were assigned to the groups: control, PRID (receiving a progesterone-releasing intravaginal device for 9 days, and prostaglandin F(2α) 24 h before PRID removal) or GnRH-PRID (the same as the PRID group plus GnRH at PRID insertion). Oestrus was detected by using pedometers and confirmed by examination of the genital tract at AI. Oestrous and conception rates before days 71-77 postpartum, pregnancy loss in early pregnant cows or the cumulative conception rate registered on day 120 postpartum were considered as the dependent variables in four consecutive logistic regression analyses. Based on the odds ratios, the oestrous rate increased by a factor of 1.73 in cows showing oestrus before treatment for each unit increase in the number of previous oestruses; decreased by a factor of 0.44 in the control group with respect to the treatment groups; and by a factor of 0.61 in cows without luteal structures at treatment with respect to cows with corpora lutea. The conception rates of cows inseminated before days 71-77 postpartum remained similar across the groups, whereas the likelihood of pregnancy loss for cows becoming pregnant during this period was 0.11 times lower in the PRID group than in the control. Based on the odds ratio, the likelihood of a higher cumulative conception rate on day 120 postpartum: increased in cows showing oestrus before treatment by a factor of 1.41 for each unit increase in the number of previous oestruses, was reduced 0.56-fold in control cows compared with treated cows, and was also reduced by a factor of 0.98 for each kilogram of milk production increase recorded at treatment. In conclusion, although oestrous synchronization programmes performed in this study did not improve

  18. FTO genotype and weight loss

    DEFF Research Database (Denmark)

    Livingstone, Katherine M; Celis-Morales, Carlos; Papandonatos, George D


    : Ovid Medline, Scopus, Embase, and Cochrane from inception to November 2015. ELIGIBILITY CRITERIA FOR STUDY SELECTION: Randomised controlled trials in overweight or obese adults reporting reduction in body mass index, body weight, or waist circumference by FTO genotype (rs9939609 or a proxy) after...

  19. FTO genotype and weight loss

    DEFF Research Database (Denmark)

    Livingstone, Katherine M; Celis-Morales, Carlos; Papandonatos, George D


    OBJECTIVE: To assess the effect of the FTO genotype on weight loss after dietary, physical activity, or drug based interventions in randomised controlled trials. DESIGN: Systematic review and random effects meta-analysis of individual participant data from randomised controlled trials. DATA SOURC...

  20. Hepatitis C Virus: Virology and Genotypes

    KAUST Repository

    Abdelaziz, Ahmed


    Hepatitis C virus (HCV) is a major causative agent of chronic liver disease worldwide. HCV is characterized by genetic heterogeneity, with at least six genotypes identified. The geographic distribution of genotypes has shown variations in different

  1. Genotype x environment interaction and optimum resource ...

    African Journals Online (AJOL)

    ... x E) interaction and to determine the optimum resource allocation for cassava yield trials. The effects of environment, genotype and G x E interaction were highly significant for all yield traits. Variations due to G x E interaction were greater than those due to genotypic differences for all yield traits. Genotype x location x year ...

  2. Genetic Divergence in Sugarcane Genotypes


    Tahir, Mohammad; Rahman, Hidayatur; Gul, Rahmani; Ali, Amjad; Khalid, Muhammad


    To assess genetic divergence of sugarcane germplasm, an experiment comprising 25 sugarcane genotypes was conducted at Sugar Crops Research Institute (SCRI), Mardan, Khyber Pakhtunkhwa, Pakistan, in quadruple lattice design during 2008-09. Among the 14 parameters evaluated, majority exhibited significant differences while some showed nonsignificant mean squares. The initial correlation matrix revealed medium to high correlations. Principal Component Analysis (PCA) showed that there were two pr...

  3. Wild boars from Sweden, Austria, the Czech Republic and Japan possess intact mannose-binding lectin 2 (MBL2) genes

    DEFF Research Database (Denmark)

    Bergmann, Ingrid-Maria; OkumuRA, N; Uenishi, H


    The two-nucleotide deletion recently detected in the mannose-binding lectin 2 gene in purebred and crossbred domestic pigs was not found among 68 wild boars representing 4 populations from Europe and Asia. This suggests that the deletion is a result of breeding and/or genetic drift/bottle necks....

  4. Decoding noises in HIV computational genotyping. (United States)

    Jia, MingRui; Shaw, Timothy; Zhang, Xing; Liu, Dong; Shen, Ye; Ezeamama, Amara E; Yang, Chunfu; Zhang, Ming


    Lack of a consistent and reliable genotyping system can critically impede HIV genomic research on pathogenesis, fitness, virulence, drug resistance, and genomic-based healthcare and treatment. At present, mis-genotyping, i.e., background noises in molecular genotyping, and its impact on epidemic surveillance is unknown. For the first time, we present a comprehensive assessment of HIV genotyping quality. HIV sequence data were retrieved from worldwide published records, and subjected to a systematic genotyping assessment pipeline. Results showed that mis-genotyped cases occurred at 4.6% globally, with some regional and high-risk population heterogeneities. Results also revealed a consistent mis-genotyping pattern in gp120 in all studied populations except the group of men who have sex with men. Our study also suggests novel virus diversities in the mis-genotyped cases. Finally, this study reemphasizes the importance of implementing a standardized genotyping pipeline to avoid genotyping disparity and to advance our understanding of virus evolution in various epidemiological settings. Copyright © 2017 Elsevier Inc. All rights reserved.

  5. Applications of blood group genotyping

    Directory of Open Access Journals (Sweden)

    Mariza A. Mota


    Full Text Available Introduction: The determination of blood group polymorphism atthe genomic level facilitates the resolution of clinical problemsthat cannot be addressed by hemagglutination. They are useful to(a determine antigen types for which currently available antibodiesare weakly reactive; (b type patients who have been recentlytransfused; (c identify fetuses at risk for hemolytic disease of thenewborn; and (d to increase the reliability of repositories of antigennegative RBCs for transfusion. Objectives: This review assessedthe current applications of blood group genotyping in transfusionmedicine and hemolytic disease of the newborn. Search strategy:Blood group genotyping studies and reviews were searched ingeneral database (MEDLINE and references were reviewed.Selection criteria: All published data and reviews were eligible forinclusion provided they reported results for molecular basis ofblood group antigens, DNA analysis for blood group polymorphisms,determination of fetal group status and applications of blood groupgenotyping in blood transfusion. Data collection: All data werecollected based on studies and reviews of blood grouppolymorphisms and their clinical applications.

  6. Grain yield stability of early maize genotypes

    Directory of Open Access Journals (Sweden)

    Chitra Bahadur Kunwar


    Full Text Available The objective of this study was to estimate grain yield stability of early maize genotypes. Five early maize genotypes namely Pool-17, Arun1EV, Arun-4, Arun-2 and Farmer’s variety were evaluated using Randomized Complete Block Design along with three replications at four different locations namely Rampur, Rajahar, Pakhribas and Kabre districts of Nepal during summer seasons of three consecutive years from 2010 to 2012 under farmer’s fields. Genotype and genotype × environment (GGE biplot was used to identify superior genotype for grain yield and stability pattern. The genotypes Arun-1 EV and Arun-4 were better adapted for Kabre and Pakhribas where as pool-17 for Rajahar environments. The overall findings showed that Arun-1EV was more stable followed by Arun-2 therefore these two varieties can be recommended to farmers for cultivation in both environments.

  7. Mannose-binding lectin gene polymorphisms are associated with disease activity and physical disability in untreated, anti-cyclic citrullinated peptide-positive patients with early rheumatoid arthritis

    DEFF Research Database (Denmark)

    Jacobsen, Søren; Garred, Peter; Madsen, Hans Ole


    OBJECTIVE: To study the association between polymorphisms in the mannose-binding lectin gene (MBL2) and disease activity, physical disability, and joint erosions in patients with newly diagnosed rheumatoid arthritis (RA). METHODS: Patients with early RA (n=158) not previously treated with disease...... modifying antirheumatic drugs, participating in a treatment trial (CIMESTRA study) were examined at inclusion for MBL2 pooled structural genotypes (O/O, A/O, A/A), regulatory MBL2 promoter polymorphism in position -221 (XX, XY, YY), anti-cyclic citrullinated peptide 2 antibodies (anti-CCP2), disease...... activity by Disease Activity Score-28 (DAS28 score), physical disability by Health Assessment Questionnaire (HAQ) score, and erosive changes in hands and feet (Sharp-van der Heijde score). RESULTS: Eight patients were homozygous MBL2 defective (O/O), 101 belonged to an intermediate group, and 49 were MBL2...

  8. Heterogeneous recombination among Hepatitis B virus genotypes. (United States)

    Castelhano, Nadine; Araujo, Natalia M; Arenas, Miguel


    The rapid evolution of Hepatitis B virus (HBV) through both evolutionary forces, mutation and recombination, allows this virus to generate a large variety of adapted variants at both intra and inter-host levels. It can, for instance, generate drug resistance or the diverse viral genotypes that currently exist in the HBV epidemics. Concerning the latter, it is known that recombination played a major role in the emergence and genetic diversification of novel genotypes. In this regard, the quantification of viral recombination in each genotype can provide relevant information to devise expectations about the evolutionary trends of the epidemic. Here we measured the amount of this evolutionary force by estimating global and local recombination rates in >4700 HBV complete genome sequences corresponding to nine (A to I) HBV genotypes. Counterintuitively, we found that genotype E presents extremely high levels of recombination, followed by genotypes B and C. On the other hand, genotype G presents the lowest level, where recombination is almost negligible. We discuss these findings in the light of known characteristics of these genotypes. Additionally, we present a phylogenetic network to depict the evolutionary history of the studied HBV genotypes. This network clearly classified all genotypes into specific groups and indicated that diverse pairs of genotypes are derived from a common ancestor (i.e., C-I, D-E and, F-H) although still the origin of this virus presented large uncertainty. Altogether we conclude that the amount of observed recombination is heterogeneous among HBV genotypes and that this heterogeneity can influence on the future expansion of the epidemic. Copyright © 2017 Elsevier B.V. All rights reserved.

  9. Hepatitis C virus genotypes in Myanmar. (United States)

    Win, Nan Nwe; Kanda, Tatsuo; Nakamoto, Shingo; Yokosuka, Osamu; Shirasawa, Hiroshi


    Myanmar is adjacent to India, Bangladesh, Thailand, Laos and China. In Myanmar, the prevalence of hepatitis C virus (HCV) infection is 2%, and HCV infection accounts for 25% of hepatocellular carcinoma. In this study, we reviewed the prevalence of HCV genotypes in Myanmar. HCV genotypes 1, 3 and 6 were observed in volunteer blood donors in and around the Myanmar city of Yangon. Although there are several reports of HCV genotype 6 and its variants in Myanmar, the distribution of the HCV genotypes has not been well documented in areas other than Yangon. Previous studies showed that treatment with peginterferon and a weight-based dose of ribavirin for 24 or 48 wk could lead to an 80%-100% sustained virological response (SVR) rates in Myanmar. Current interferon-free treatments could lead to higher SVR rates (90%-95%) in patients infected with almost all HCV genotypes other than HCV genotype 3. In an era of heavy reliance on direct-acting antivirals against HCV, there is an increasing need to measure HCV genotypes, and this need will also increase specifically in Myanmar. Current available information of HCV genotypes were mostly from Yangon and other countries than Myanmar. The prevalence of HCV genotypes in Myanmar should be determined.

  10. Hepatitis C Virus: Virology and Genotypes

    KAUST Repository

    Abdelaziz, Ahmed


    Hepatitis C virus (HCV) is a major causative agent of chronic liver disease worldwide. HCV is characterized by genetic heterogeneity, with at least six genotypes identified. The geographic distribution of genotypes has shown variations in different parts of the world over the past decade because of variations in population structure, immigration, and routes of transmission. Genotype differences are of epidemiologic interest and help the study of viral transmission dynamics to trace the source of HCV infection in a given population. HCV genotypes are also of considerable clinical importance because they affect response to antiviral therapy and represent a challenging obstacle for vaccine development.

  11. Evaluation of the Abbott Real Time HCV genotype II assay for Hepatitis C virus genotyping. (United States)

    Sariguzel, Fatma Mutlu; Berk, Elife; Gokahmetoglu, Selma; Ercal, Baris Derya; Celik, Ilhami


    The determination of HCV genotypes and subtypes is very important for the selection of antiviral therapy and epidemiological studies. The aim of this study was to evaluate the performance of Abbott Real Time HCV Genotype II assay in HCV genotyping of HCV infected patients in Kayseri, Turkey. One hundred patients with chronic hepatitis C admitted to our hospital were evaluated between June 2012 and December 2012, HCV RNA levels were determined by the COBAS® AmpliPrep/COBAS® TaqMan® 48 HCV test. HCV genotyping was investigated by the Abbott Real Time HCV Genotype II assay. With the exception of genotype 1, subtypes of HCV genotypes could not be determined by Abbott assay. Sequencing analysis was used as the reference method. Genotypes 1, 2, 3 and 4 were observed in 70, 4, 2 and 24 of the 100 patients, respectively, by two methods. The concordance between the two systems to determine HCV major genotypes was 100%. Of 70 patients with genotype 1, 66 showed infection with subtype 1b and 4 with subtype 1a by Abbott Real Time HCV Genotype II assay. Using sequence analysis, 61 showed infection with subtype 1b and 9 with subtype 1a. In determining of HCV genotype 1 subtypes, the difference between the two methods was not statistically significant (P>0.05). HCV genotype 4 and 3 samples were found to be subtype 4d and 3a, respectively, by sequence analysis. There were four patients with genotype 2. Sequence analysis revealed that two of these patients had type 2a and the other two had type 2b. The Abbott Real Time HCV Genotype II assay yielded results consistent with sequence analysis. However, further optimization of the Abbott Real Time HCV Genotype II assay for subtype identification of HCV is required.

  12. Genotyping isolates of the entomopathogenic fungus Beauveria ...

    African Journals Online (AJOL)

    Multi-locus denaturing gradient gel electrophoresis (DGGE) analysis was developed to investigate the genotypes of Beauveria bassiana sensu lato. ... These results demonstrated that multi-locus DGGE is a potentially useful molecular marker for genotyping, identifying and tracking the fates of experimentally released ...

  13. Genetic relationship among Musa genotypes revealed by ...

    African Journals Online (AJOL)



    Mar 29, 2012 ... A banana germplasm was established containing 44 Musa genotypes collected from various locations in Malaysia. To detect their genetic variation and to rule out duplicates among cultivar, microsatellite markers were used in their analysis. The microsatellite profiles of 44 Musa genotypes of various origins.

  14. Toward fully automated genotyping: Genotyping microsatellite markers by deconvolution

    Energy Technology Data Exchange (ETDEWEB)

    Perlin, M.W.; Lancia, G.; See-Kiong, Ng [Carnegie Mellon Univ., Pittsburgh, PA (United States)


    Dense genetic linkage maps have been constructed for the human and mouse genomes, with average densities of 2.9 cM and 0.35 cM, respectively. These genetic maps are crucial for mapping both Mendelian and complex traits and are useful in clinical genetic diagnosis. Current maps are largely comprised of abundant, easily assayed, and highly polymorphic PCR-based microsatellite markers, primarily dinucleotide (CA){sub n} repeats. One key limitation of these length polymorphisms is the PCR stutter (or slippage) artifact that introduces additional stutter bands. With two (or more) closely spaced alleles, the stutter bands overlap, and it is difficult to accurately determine the correct alleles; this stutter phenomenon has all but precluded full automation, since a human must visually inspect the allele data. We describe here novel deconvolution methods for accurate genotyping that mathematically remove PCR stutter artifact from microsatellite markers. These methods overcome the manual interpretation bottleneck and thereby enable full automation of genetic map construction and use. New functionalities, including the pooling of DNAs and the pooling of markers, are described that may greatly reduce the associated experimentation requirements. 32 refs., 5 figs., 3 tabs.

  15. Genomic evaluations with many more genotypes

    Directory of Open Access Journals (Sweden)

    Wiggans George R


    Full Text Available Abstract Background Genomic evaluations in Holstein dairy cattle have quickly become more reliable over the last two years in many countries as more animals have been genotyped for 50,000 markers. Evaluations can also include animals genotyped with more or fewer markers using new tools such as the 777,000 or 2,900 marker chips recently introduced for cattle. Gains from more markers can be predicted using simulation, whereas strategies to use fewer markers have been compared using subsets of actual genotypes. The overall cost of selection is reduced by genotyping most animals at less than the highest density and imputing their missing genotypes using haplotypes. Algorithms to combine different densities need to be efficient because numbers of genotyped animals and markers may continue to grow quickly. Methods Genotypes for 500,000 markers were simulated for the 33,414 Holsteins that had 50,000 marker genotypes in the North American database. Another 86,465 non-genotyped ancestors were included in the pedigree file, and linkage disequilibrium was generated directly in the base population. Mixed density datasets were created by keeping 50,000 (every tenth of the markers for most animals. Missing genotypes were imputed using a combination of population haplotyping and pedigree haplotyping. Reliabilities of genomic evaluations using linear and nonlinear methods were compared. Results Differing marker sets for a large population were combined with just a few hours of computation. About 95% of paternal alleles were determined correctly, and > 95% of missing genotypes were called correctly. Reliability of breeding values was already high (84.4% with 50,000 simulated markers. The gain in reliability from increasing the number of markers to 500,000 was only 1.6%, but more than half of that gain resulted from genotyping just 1,406 young bulls at higher density. Linear genomic evaluations had reliabilities 1.5% lower than the nonlinear evaluations with 50

  16. Developmental plasticity: re-conceiving the genotype. (United States)

    Sultan, Sonia E


    In recent decades, the phenotype of an organism (i.e. its traits and behaviour) has been studied as the outcome of a developmental 'programme' coded in its genotype. This deterministic view is implicit in the Modern Synthesis approach to adaptive evolution as a sorting process among genetic variants. Studies of developmental pathways have revealed that genotypes are in fact differently expressed depending on environmental conditions. Accordingly, the genotype can be understood as a repertoire of potential developmental outcomes or norm of reaction. Reconceiving the genotype as an environmental response repertoire rather than a fixed developmental programme leads to three critical evolutionary insights. First, plastic responses to specific conditions often comprise functionally appropriate trait adjustments, resulting in an individual-level, developmental mode of adaptive variation. Second, because genotypes are differently expressed depending on the environment, the genetic diversity available to natural selection is itself environmentally contingent. Finally, environmental influences on development can extend across multiple generations via cytoplasmic and epigenetic factors transmitted to progeny individuals, altering their responses to their own, immediate environmental conditions and, in some cases, leading to inherited but non-genetic adaptations. Together, these insights suggest a more nuanced understanding of the genotype and its evolutionary role, as well as a shift in research focus to investigating the complex developmental interactions among genotypes, environments and previous environments.

  17. Genotype X/C recombinant (putative genotype I) of hepatitis B virus is rare in Hanoi, Vietnam--genotypes B4 and C1 predominate. (United States)

    Phung, Thi Bich Thuy; Alestig, Erik; Nguyen, Thanh Liem; Hannoun, Charles; Lindh, Magnus


    There are eight known genotypes of hepatitis B virus, A-H, and several subgenotypes, with rather well-defined geographic distributions. HBV genotypes were evaluated in 153 serum samples from Hanoi, Vietnam. Of the 87 samples that could be genotyped, genotype B was found in 67 (77%) and genotype C in 19 (22%). All genotype C strains were of subgenotype C1, and the majority of genotype B strains were B4, while a few were B2. The genotype X/C recombinant strain, identified previously in Swedish patients of indigenous Vietnamese origin, was found in one sample. This variant, proposed to be classified as genotype I, has been found recently also by others in Vietnam and Laos. The current study indicates that the genotype X/C recombinant may represent approximately 1% of the HBV strains circulating in Vietnam. (c) 2010 Wiley-Liss, Inc.

  18. Studies on hepatic lipidosis and coinciding health and fertility problems of high-producing dairy cows using the "Utrecht fatty liver model of dairy cows". A review. (United States)

    Geelen, M J H; Wensing, T


    Fatty liver or hepatic lipidosis is a major metabolic disorder of high-producing dairy cows that occurs rather frequently in early lactation and is associated with decreased health, production and fertility. A background section of the review explores reasons why high-producing dairy cows are prone to develop fatty liver post partum. Hepatic lipidosis and coinciding health and fertility problems seriously endanger profitability and longevity of the dairy cow. Results from a great number of earlier epidemiological and clinical studies made it clear that a different approach was needed for elucidation of pathogenesis and etiology of this complex of health problems. There was a need for an adequate animal model in which hepatic lipidosis and production, health and fertility problems could be provoked under controlled conditions. It was hypothesized that overconditioning ante partum and feed restriction post partum might induce lipolysis in adipose tissue and triacylglycerol accumulation in the liver following calving. This consideration formed the basis for the experiments, which resulted in the "Utrecht fatty liver model of dairy cows". In this model, post partum triacylglycerol-lipidosis as well as the whole complex of health and fertility problems are induced under well-controlled conditions. The experimental protocol based on this hypothesis produced in all cases (10 feeding trials with over 150 dairy cattle) the intended result, i.e. all experimental cows developed post partum higher hepatic triacylglycerol concentrations than did control cows. The model was evaluated in biochemical, clinical pathology, immunological, clinical and fertility terms. It turned out that in this model, post partum triacylglycerol-lipidosis as well as the whole complex of health and fertility problems were induced under well-controlled conditions.

  19. Hepatitis B virus genotypes circulating in Brazil: molecular characterization of genotype F isolates

    Directory of Open Access Journals (Sweden)

    Virgolino Helaine A


    Full Text Available Abstract Background Hepatitis B virus (HBV isolates have been classified in eight genotypes, A to H, which exhibit distinct geographical distributions. Genotypes A, D and F are predominant in Brazil, a country formed by a miscegenated population, where the proportion of individuals from Caucasian, Amerindian and African origins varies by region. Genotype F, which is the most divergent, is considered indigenous to the Americas. A systematic molecular characterization of HBV isolates from different parts of the world would be invaluable in establishing HBV evolutionary origins and dispersion patterns. A large-scale study is needed to map the region-by-region distribution of the HBV genotypes in Brazil. Results Genotyping by PCR-RFLP of 303 HBV isolates from HBsAg-positive blood donors showed that at least two of the three genotypes, A, D, and F, co-circulate in each of the five geographic regions of Brazil. No other genotypes were identified. Overall, genotype A was most prevalent (48.5%, and most of these isolates were classified as subgenotype A1 (138/153; 90.2%. Genotype D was the most common genotype in the South (84.2% and Central (47.6% regions. The prevalence of genotype F was low (13% countrywide. Nucleotide sequencing of the S gene and a phylogenetic analysis of 32 HBV genotype F isolates showed that a great majority (28/32; 87.5% belonged to subgenotype F2, cluster II. The deduced serotype of 31 of 32 F isolates was adw4. The remaining isolate showed a leucine-to-isoleucine substitution at position 127. Conclusion The presence of genotypes A, D and F, and the absence of other genotypes in a large cohort of HBV infected individuals may reflect the ethnic origins of the Brazilian population. The high prevalence of isolates from subgenotype A1 (of African origin indicates that the African influx during the colonial slavery period had a major impact on the circulation of HBV genotype A currently found in Brazil. Although most genotype F

  20. Forensic SNP genotyping with SNaPshot

    DEFF Research Database (Denmark)

    Fondevila, M; Børsting, C; Phillips, C


    to routine STR profiling, use of SNaPshot is an important part of the development of SNP sets for a wide range of forensic applications with these markers, from genotyping highly degraded DNA with very short amplicons to the introduction of SNPs to ascertain the ancestry and physical characteristics......This review explores the key factors that influence the optimization, routine use, and profile interpretation of the SNaPshot single-base extension (SBE) system applied to forensic single-nucleotide polymorphism (SNP) genotyping. Despite being a mainly complimentary DNA genotyping technique...... of an unidentified contact trace donor. However, this technology, as resourceful as it is, displays several features that depart from the usual STR genotyping far enough to demand a certain degree of expertise from the forensic analyst before tackling the complex casework on which SNaPshot application provides...

  1. HMSRP Hawaiian Monk Seal Microsatellite Genotypes (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Currently ~2,400 Hawaiian monk seal specimens have been analyzed genetically, providing genotypes at 18 microsatellite loci. These data are organized by individual,...

  2. Global distribution of novel rhinovirus genotype

    DEFF Research Database (Denmark)

    Briese, Thomas; Renwick, Neil; Venter, Marietjie


    Global surveillance for a novel rhinovirus genotype indicated its association with community outbreaks and pediatric respiratory disease in Africa, Asia, Australia, Europe, and North America. Molecular dating indicates that these viruses have been circulating for at least 250 years Udgivelsesdato...

  3. Assessment of antibiotic susceptibilities, genotypic characteristics ...

    African Journals Online (AJOL)



    Sep 28, 2011 ... Staphylococcus aureus and Salmonella Typhimurium ... This study was designed to evaluate the antibiotic susceptibilities, genotypic characteristics and ..... Distribution of reference and virulence genes among antibiotic-sensitive S. aureus (SAS), .... environmental factors such as temperature, water activity,.

  4. Hepatitis C Virus: Viral Quasispecies and Genotypes

    Directory of Open Access Journals (Sweden)

    Kyoko Tsukiyama-Kohara


    Full Text Available Hepatitis C virus (HCV mainly replicates in the cytoplasm, where it easily establishes persistent infection, resulting in chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma. Due to its high rate of mutation, HCV forms viral quasispecies, categorized based on the highly variable regions in the envelope protein and nonstructural 5A protein. HCV possesses seven major genotypes, among which genotype 1 is the most prevalent globally. The distribution of HCV genotypes varies based on geography, and each genotype has a different sensitivity to interferon treatment. Recently-developed direct-acting antivirals (DAAs, which target viral proteases or polymerases, mediate drastically better antiviral effects than previous therapeutics. Although treatment with DAAs has led to the development of drug-resistant HCV mutants, the most recently approved DAAs show improved pan-genomic activity, with a higher barrier to viral resistance.

  5. Hepatitis C Virus: Viral Quasispecies and Genotypes. (United States)

    Tsukiyama-Kohara, Kyoko; Kohara, Michinori


    Hepatitis C virus (HCV) mainly replicates in the cytoplasm, where it easily establishes persistent infection, resulting in chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma. Due to its high rate of mutation, HCV forms viral quasispecies, categorized based on the highly variable regions in the envelope protein and nonstructural 5A protein. HCV possesses seven major genotypes, among which genotype 1 is the most prevalent globally. The distribution of HCV genotypes varies based on geography, and each genotype has a different sensitivity to interferon treatment. Recently-developed direct-acting antivirals (DAAs), which target viral proteases or polymerases, mediate drastically better antiviral effects than previous therapeutics. Although treatment with DAAs has led to the development of drug-resistant HCV mutants, the most recently approved DAAs show improved pan-genomic activity, with a higher barrier to viral resistance.

  6. Early seedling development of Medicago truncatula genotypes ...

    African Journals Online (AJOL)



    Jan 8, 2014 ... heat shock proteins; ABA, abscisic acid. Page 2. Amar et al. 323. Figure 1. Seed vigor of M. truncatula genotypes under different salt stress conditions. Results are means ..... (HSPs) that accumulate during seed late maturation.

  7. Hearing impairment in genotyped Wolfram syndrome patients.

    NARCIS (Netherlands)

    Plantinga, R.F.; Pennings, R.J.E.; Huygen, P.L.M.; Bruno, R.; Eller, P.; Barrett, T.G.; Vialettes, B.; Paquis-Fluklinger, V.; Lombardo, F.; Cremers, C.W.R.J.


    OBJECTIVES: Wolfram syndrome is a progressive neurodegenerative syndrome characterized by the features "DIDMOAD" (diabetes insipidus, diabetes mellitus, optic atrophy, and deafness). We sought to study the audiometric data of genotyped Wolfram syndrome patients with sensorineural hearing impairment.

  8. Existence of various human parvovirus B19 genotypes in Chinese plasma pools: genotype 1, genotype 3, putative intergenotypic recombinant variants and new genotypes. (United States)

    Jia, Junting; Ma, Yuyuan; Zhao, Xiong; Huangfu, Chaoji; Zhong, Yadi; Fang, Chi; Fan, Rui; Lv, Maomin; Zhang, Jingang


    Human parvovirus B19 (B19V) is a frequent contaminant of blood and plasma-derived medicinal products. Three distinct genotypes of B19V have been identified. The distribution of the three B19V genotypes has been investigated in various regions or countries. However, in China, data on the existence of different B19V genotypes are limited. One hundred and eighteen B19V-DNA positive source plasma pool samples collected from three Chinese blood products manufacturers were analyzed. The subgenomic NS1/VP1u region junction of B19V was amplified by nested PCR. These amplified products were then cloned and subsequently sequenced. For genotyping, their phylogenetic inferences were constructed based on the NS1/VP1-unique region. Then putative recombination events were analyzed and identified. Phylogenetic analysis of 118 B19V sequences attributed 61.86 % to genotype 1a, 10.17 % to genotype 1b, and 17.80 % to genotype 3b. All the genotype 3b sequences obtained in this study grouped as a specific, closely related cluster with B19V strain D91.1. Four 1a/3b recombinants and 5 new atypical B19V variants with no recombination events were identified. There were at least 3 subtypes (1a, 1b and 3b) of B19V circulating in China. Furthermore, putative B19V 1a/3b recombinants and unclassified strains were identified as well. Such recombinant and unclassified strains may contribute to the genetic diversity of B19V and consequently complicate the B19V infection diagnosis and NAT screening. Further studies will be required to elucidate the biological significance of the recombinant and unclassified strains.

  9. Popcorn genotypes resistance to fall armyworm

    Directory of Open Access Journals (Sweden)

    Nádia Cristina de Oliveira


    Full Text Available ABSTRACT: The aim of this study was to evaluate popcorn genotypes for resistance to the fall armyworm, Spodoptera frugiperda. The experiment used a completely randomized design with 30 replicates. The popcorn genotypes Aelton, Arzm 05 083, Beija-Flor, Colombiana, Composto Chico, Composto Gaúcha, Márcia, Mateus, Ufvm Barão Viçosa, Vanin, and Viviane were evaluated,along with the common maize variety Zapalote Chico. Newly hatched fall armyworm larvae were individually assessed with regard to biological development and consumption of food. The data were subjected to multivariate analyses of variance and genetic divergence among genotypes was evaluated through the clustering methods of Tocher based on generalized Mahalanobis distances and canonical variable analyses. Seven popcorn genotypes, namely, Aelton, Arzm 05 083, Composto Chico, Composto Gaúcha, Márcia, Mateus, and Viviane,were shown to form a cluster (cluster I that had antibiosis as the mechanism of resistance to the pest. Cluster I genotypes and the Zapalote Chico genotype could be used for stacking genes for antibiosis and non-preference resistance.

  10. Cotton genotypes selection through artificial neural networks. (United States)

    Júnior, E G Silva; Cardoso, D B O; Reis, M C; Nascimento, A F O; Bortolin, D I; Martins, M R; Sousa, L B


    Breeding programs currently use statistical analysis to assist in the identification of superior genotypes at various stages of a cultivar's development. Differently from these analyses, the computational intelligence approach has been little explored in genetic improvement of cotton. Thus, this study was carried out with the objective of presenting the use of artificial neural networks as auxiliary tools in the improvement of the cotton to improve fiber quality. To demonstrate the applicability of this approach, this research was carried out using the evaluation data of 40 genotypes. In order to classify the genotypes for fiber quality, the artificial neural networks were trained with replicate data of 20 genotypes of cotton evaluated in the harvests of 2013/14 and 2014/15, regarding fiber length, uniformity of length, fiber strength, micronaire index, elongation, short fiber index, maturity index, reflectance degree, and fiber quality index. This quality index was estimated by means of a weighted average on the determined score (1 to 5) of each characteristic of the HVI evaluated, according to its industry standards. The artificial neural networks presented a high capacity of correct classification of the 20 selected genotypes based on the fiber quality index, so that when using fiber length associated with the short fiber index, fiber maturation, and micronaire index, the artificial neural networks presented better results than using only fiber length and previous associations. It was also observed that to submit data of means of new genotypes to the neural networks trained with data of repetition, provides better results of classification of the genotypes. When observing the results obtained in the present study, it was verified that the artificial neural networks present great potential to be used in the different stages of a genetic improvement program of the cotton, aiming at the improvement of the fiber quality of the future cultivars.

  11. Hepatitis C virus genotypes in Bahawalpur

    International Nuclear Information System (INIS)

    Qazi, M.A.; Fayyaz, M.; Chaudhry, G.M.D.; Jamil, A.


    This study was conducted at Medical Unit-II Bahawal Victoria Hospital / Quaid-e-Azam Medical College Bahawalpur from May 1st , 2005 to December 31st 2005. The objective of this study was to determine hepatitis C virus (HCV) genotypes in Bahawalpur, Pakistan. In consecutive 105 anti-HCV (ELISA-3) positive patients, complete history and physical examination was performed. Liver function tests, complete blood counts and platelet count, blood sugar fasting and 2 hours after breakfast, prothrombin time, serum albumin, serum globulin and abdominal ultrasound were carried out in all the patients. Tru cut biopsy was performed on 17 patients. We studied HCV RNA in all these patients by Nested PCR method. HCV RNA was detected in 98 patients and geno typing assay was done by genotype specific PCR. Among total of 105 anti-HCV positive patients, HCV-RNA was detected in 98 patients. Out of these 98 patients there were 57 (58.2%) males and 41 (42.8%) females. Their age range was 18-75 years. The age 18-29 years 26 (26.5%), 30-39 years 35 (35.7%) and 40-75 37 (37.8%), while 10 (10.2%) patients were diabetics and 34 (34.7%) patients were obese. Liver cirrhosis was present in 10 (10.2%) patients. Forty two (43.9%) patients were symptomatic while 56 (57.1%) were asymptomatic. Out of 98 patients 11 (11.2%) were un type-able and 87 (88.8%) were type able. 70/98 (71.4%) were genotype 3; 10/98 (10.2%) were genotype 1; 03/98 (3.1%) were genotype 2; 03/98 (3.1%) were mixed genotype 2 and 3; 01/98 (1%) were mixed genotype 3a and 3b. Genotype 3 is the most common HCV virus in our area which shows that both virological and biochemical response will be better. Because HCV genotype 3 is more frequent among the drug users which points towards unsafe injection practices in our area. (author)

  12. Phenotypic and genotypic variation in Iranian Pistachios

    Directory of Open Access Journals (Sweden)

    Somayeh Tayefeh Aliakbarkhani


    Full Text Available As Iran is one of the richest pistachio germplasms a few studies have been conducted on different sexes of pistachio trees, in areas where this crop emerged. To this end, 40 male and female Iranian pistachio genotypes from Feizabad region, Khorasan, Iran; were evaluated using morphological characters and randomly amplified polymorphic DNA (RAPD markers. For morphological assessments, 54 variables were considered to investigate similarities between and among the studied genotypes. Morphological data indicated relative superiority in some female genotypes (such as Sefid 1, Sefid Sabuni 2, Garmesiah, and Ghermezdorosht Z regarding characters such as halfcrackedness, the percentages of protein and fat content. 115 polymorphic bands were recorded with 92.83% average polymorphism among all primers. The total resolving power (Rp of the primers was 74.54. The range of genetic similarity varied from about 0.31 to about 0.70. Genotypes were segregated into eight groups at the similarity limit of 0.41. Results of present investigation could be helpful for strategic decisions for maintaining Iranian pistachio genotypes.

  13. Precise genotyping and recombination detection of Enterovirus (United States)


    Enteroviruses (EV) with different genotypes cause diverse infectious diseases in humans and mammals. A correct EV typing result is crucial for effective medical treatment and disease control; however, the emergence of novel viral strains has impaired the performance of available diagnostic tools. Here, we present a web-based tool, named EVIDENCE (EnteroVirus In DEep conception,, for EV genotyping and recombination detection. We introduce the idea of using mixed-ranking scores to evaluate the fitness of prototypes based on relatedness and on the genome regions of interest. Using phylogenetic methods, the most possible genotype is determined based on the closest neighbor among the selected references. To detect possible recombination events, EVIDENCE calculates the sequence distance and phylogenetic relationship among sequences of all sliding windows scanning over the whole genome. Detected recombination events are plotted in an interactive figure for viewing of fine details. In addition, all EV sequences available in GenBank were collected and revised using the latest classification and nomenclature of EV in EVIDENCE. These sequences are built into the database and are retrieved in an indexed catalog, or can be searched for by keywords or by sequence similarity. EVIDENCE is the first web-based tool containing pipelines for genotyping and recombination detection, with updated, built-in, and complete reference sequences to improve sensitivity and specificity. The use of EVIDENCE can accelerate genotype identification, aiding clinical diagnosis and enhancing our understanding of EV evolution. PMID:26678286

  14. Saponin profile of green asparagus genotypes. (United States)

    Vázquez-Castilla, Sara; Jaramillo-Carmona, Sara; Fuentes-Alventosa, Jose María; Jiménez-Araujo, Ana; Rodríguez-Arcos, Rocío; Cermeño-Sacristán, Pedro; Espejo-Calvo, Juan Antonio; Guillén-Bejarano, Rafael


    The main goal of this study was to determine the saponin profiles of different "triguero" asparagus genotypes and to compare them to green asparagus commercial hybrids. The samples consisted of 31 commercial hybrids and 58 genotypes from the Huétor-Tájar (HT) population variety ("triguero"). The saponin analysis by high-performance liquid chromatography-mass spectrometry allowed for the determination of 12 saponins derived from a furostan-type steroidal genin, 4 of which had never been described in the edible part of asparagus. The saponin profile of "triguero" asparagus was a combination of these new saponins and protodioscin. Although protodioscin was the major saponin found in commercial hybrids, some of these 12 saponins were detected as major components in some of the commercial hybrids. The total contents of saponins described in some of these HT genotypes reach values as high as 10-100 times higher than those found in commercial hybrids.

  15. Carcass traits of four rabbit genotypes

    Directory of Open Access Journals (Sweden)

    Ajda Kermauner


    Full Text Available Seventy-three rabbits of four genotypes (A - SIKA maternal line; C - SIKA sire line; AxC - hybrids between line A and C; AxCal - crossbreds between line A and the Californian breed were used to evaluate the effect of genotype on carcass traits. Rabbits were weaned at 35 days and slaughtered at 93 days of age. Rabbits were fed standard feed mixture ad libitum. The highest live weight at slaughter and dressing percentage was achieved by line C, and the lowest in line A. Hybrids between line A and C exhibited slightly worse carcass traits than rabbits in line C, but the differences were not statistically significant. The Californian breed gave worse results than crossbreeding with line C, though in most cases the differences between AxC and AxCal were not significant. The differences between genotypes in hind leg tissue composition, pH and meat colour were not statistically significant.

  16. Genotype x environment interaction for grain yield of wheat genotypes tested under water stress conditions

    International Nuclear Information System (INIS)

    Sail, M.A.; Dahot, M.U.; Mangrio, S.M.; Memon, S.


    Effect of water stress on grain yield in different wheat genotypes was studied under field conditions at various locations. Grain yield is a complex polygenic trait influenced by genotype, environment and genotype x environment (GxE) interaction. To understand the stability among genotypes for grain yield, twenty-one wheat genotypes developed Through hybridization and radiation-induced mutations at Nuclear Institute of Agriculture (NIA) TandoJam were evaluated with four local check varieties (Sarsabz, Thori, Margalla-99 and Chakwal-86) in multi-environmental trails (MET/sub s/). The experiments were conducted over 5 different water stress environments in Sindh. Data on grain yield were recorded from each site and statistically analyzed. Combined analysis of variance for all the environments indicated that the genotype, environment and genotype x environment (GxE) interaction were highly significant (P greater then 0.01) for grain yield. Genotypes differed in their response to various locations. The overall highest site mean yield (4031 kg/ha) recorded at Moro and the lowest (2326 kg/ha) at Thatta. Six genotypes produced significantly (P=0.01) the highest grain yield overall the environments. Stability analysis was applied to estimate stability parameters viz., regression coefficient (b), standard error of regression coefficient and variance due to deviation from regression (S/sub 2/d) genotypes 10/8, BWS-78 produced the highest mean yield over all the environments with low regression coefficient (b=0.68, 0.67 and 0.63 respectively and higher S/sup 2/ d value, showing specific adaptation to poor (un favorable) environments. Genotype 8/7 produced overall higher grain yield (3647 kg/ha) and ranked as third high yielding genotype had regression value close to unity (b=0.9) and low S/sup d/ value, indicating more stability and wide adaptation over the all environments. The knowledge of the presence and magnitude of genotype x environment (GE) interaction is important to

  17. Oilseed rape genotypes response to boron toxicity

    Directory of Open Access Journals (Sweden)

    Savić Jasna


    Full Text Available Response of 16 oilseed rape genotypes to B (boron toxicity was analyzed by comparing the results of two experiments conducted in a glasshouse. In Experiment 1 plants were grown in standard nutrient solutions with 10 µMB (control and 1000 µM B. Relative root and shoot growth varied from 20-120% and 31-117%, respectively. Variation in B concentration in shoots was also wide (206.5-441.7 µg B g-1 DW as well as total B uptake by plant (62.3-281.2 µg B g1. Four selected genotypes were grown in Experiment 2 in pots filled with high B soil (8 kg ha-1 B; B8. Shoot growth was not affected by B8 treatment, while root and shoot B concentration was significantly increased compared to control. Genotypes Panther and Pronto which performed low relative root and shoot growth and high B accumulation in plants in Experiment 1, had good growth in B8 treatment. In Experiment 2 genotype NS-L-7 had significantly lower B concentration in shots under treatment B8, but also very high B accumulation in Experiment 1. In addition, cluster analyses classified genotypes in three groups according to traits contrasting in their significance for analyzing response to B toxicity. The first group included four varieties based on their shared characteristics that have small value for the relative growth of roots and shoots and large values of B concentration in shoot. In the second largest group were connected ten genotypes that are heterogeneous in traits and do not stand out on any characteristic. Genotypes NS-L-7 and Navajo were separated in the third group because they had big relative growth of root and shoot, but also a high concentration of B in the shoot, and high total B uptake. Results showed that none of tested genotypes could not be recommended for breeding process to tolerance for B toxicity. [Projekat Ministarstva nauke Republike Srbije, br. OI 173028

  18. Specificity of the Linear Array HPV Genotyping Test for detecting human papillomavirus genotype 52 (HPV-52)


    Kocjan, Boštjan; Poljak, Mario; Oštrbenk, Anja


    Introduction: HPV-52 is one of the most frequent human papillomavirus (HPV) genotypes causing significant cervical pathology. The most widely used HPV genotyping assay, the Roche Linear Array HPV Genotyping Test (Linear Array), is unable to identify HPV- 52 status in samples containing HPV-33, HPV-35, and/or HPV-58. Methods: Linear Array HPV-52 analytical specificity was established by testing 100 specimens reactive with the Linear Array HPV- 33/35/52/58 cross-reactive probe, but not with the...

  19. An Affymetrix Microarray Design for Microbial Genotyping (United States)


    les échantillons qui ne se prêtent pas aux méthodes culturales de la microbiologie classique. La puce à ADN est une technologie qui permet la... area of microbial genotyping there are multiple platforms that can identify one or a few microbial targets in a single assay iteration. For most

  20. Human papillomavirus genotyping by multiplex pyrosequencing in ...

    Indian Academy of Sciences (India)


    malignant cervical samples ... low- and high-risk HPV genotypes without identifying ... Since these samples were not from “healthy .... major capsid protein, any variation in its coding sequence is .... worldwide: a meta-analysis; Br. J. Cancer 88 63–73.

  1. Physicochemical and sensorial quality of banana genotypes

    Directory of Open Access Journals (Sweden)

    Ronielli Cardoso Reis


    Full Text Available Despite the diversity of banana varieties in Brazil, only a few cultivars have the proper agronomic traits and fruit quality for commercial exploitation. This study aimed at evaluating the physicochemical traits and sensorial acceptance of banana genotypes, in order to identify those with potential for commercial growing. Six improved banana genotypes were assessed (BRS Maravilha, PC 0101, FHIA 18, TM 2803, YB 4203 and BRS Caipira, as well as three commercial cultivars (Grand Naine, Pacovan and Prata Anã. Analyses of peel and pulp color, peel thickness, pulp yield, moisture, pH, soluble solids, titratable acidity, total carotenoids and sensorial acceptance were performed. The BRS Maravilha, FHIA 18, YB 4203 and BRS Caipira genotypes presented physicochemical traits similar to the Grand Naine, Pacovan and Prata Anã commercial cultivars. The BRS Maravilha and TM 2803 genotypes had sensorial acceptance similar to the Prata Anã and Grand Naine cultivars, and are therefore promising for commercial growing, with the advantage of being resistant to the black Sigatoka and Panama disease.

  2. Genotyping of human pappilomavirus in cervical precancerous ...

    African Journals Online (AJOL)

    Background: Cervical cancer caused by human papilloma virus (HPV), is the second most common cancer for women. This cancer is distributed worldwide, with ~80% of cases are found in the developing countries. In Indonesia, data of HPV genotypes are still limited and do not represent all regions of the country. Thus ...

  3. Cryptosporidium Pig Genotype II in Immunocompetent Man

    Czech Academy of Sciences Publication Activity Database

    Kváč, Martin; Květoňová, Dana; Sak, Bohumil; Ditrich, Oleg


    Roč. 15, č. 6 (2009), s. 982-983 ISSN 1080-6040 R&D Projects: GA ČR GP523/07/P117 Institutional research plan: CEZ:AV0Z60220518 Keywords : immunocompetent patients * cryptosporidiosis * Cryptosporidium pig genotype II Subject RIV: GJ - Animal Vermins ; Diseases , Veterinary Medicine Impact factor: 6.794, year: 2009

  4. Morphometric characteristics of Lotus corniculatus L. genotypes ...

    African Journals Online (AJOL)

    The aim of this study was to examine the degree of variability in morphological and agronomic characteristics of 20 Lotus corniculatus L. local genotypes, and also to set aside germplasm that will be used as a source of genetic basis for improvement of the studied properties. In poor quality soils, L. corniculatus L. plays an ...

  5. Genotype X Fertility Interactions in Seedling Sweetgum (United States)

    Scott X. Chang; Daniel J. Robison


    Genotype x fertility interactions may affect the suitability of sweetgum (Liquidambar styraciflua L.) for specific sites or the efficiency of nutrient use. To gain a better understanding of these interactions, 2-year-old sweetgum seedlings from two half-sib families were tested for growth response to N (0 and 100 kg/ha equivalent) and P (0 and 50 kg...

  6. (AMMI) and genotype by environment interaction

    African Journals Online (AJOL)



    Apr 30, 2014 ... Background and justification: Lack of stable high yielding cultivars is one ... of advanced finger millet genotypes evaluated in multiple environments, and (ii) identify stable high yielding .... for interaction principal component axis (IPCA) n, γgn ..... Table 2: Analysis of variance for grain yield using AMMI model.

  7. Impact of inter-genotypic recombination and probe cross-reactivity on the performance of the Abbott RealTime HCV Genotype II assay for hepatitis C genotyping. (United States)

    Sridhar, Siddharth; Yip, Cyril C Y; Chan, Jasper F W; To, Kelvin K W; Cheng, Vincent C C; Yuen, Kwok-Yung


    The Abbott RealTime HCV Genotype II assay (Abbott-RT-HCV assay) is a real-time PCR based genotyping method for hepatitis C virus (HCV). This study measured the impact of inter-genotypic recombination and probe cross-reactivity on the performance of the Abbott-RT-HCV assay. 517 samples were genotyped using the Abbott-RT-HCV assay over a one-year period, 34 (6.6%) were identified as HCV genotype 1 without further subtype designation raising the possibility of inaccurate genotyping. These samples were subjected to confirmatory sequencing. 27 of these 34 (79%) samples were genotype 1b while five (15%) were genotype 6. One HCV isolate was an inter-genotypic 1a/4o recombinant. This is a novel natural HCV recombinant that has never been reported. Inter-genotypic recombination and probe cross-reactivity can affect the accuracy of the Abbott-RT-HCV assay, both of which have significant implications on antiviral regimen choice. Confirmatory sequencing of ambiguous results is crucial for accurate genotyping. Copyright © 2018 Elsevier Inc. All rights reserved.

  8. In Vitro Conservation of Sweet Potato Genotypes

    Directory of Open Access Journals (Sweden)

    Maria de Fátima Arrigoni-Blank


    Full Text Available The aim of this study was to develop a protocol for the in vitro conservation of sweet potato genotypes using the slow growth technique. The first experiment was conducted in a 4×5×2 factorial scheme, testing four genotypes (IPB-007, IPB-052, IPB-072, and IPB-137, five concentrations of abscisic acid (ABA (0.0, 1.0, 2.0, 4.0, and 8.0 mg·L−1, and two temperatures (18 and 25°C. The second experiment was conducted in a 4×3×3 factorial scheme at 18°C, testing four genotypes (IPB-007, IPB-052, IPB-072, and IPB-137, three variations of MS salts (50, 75, and 100%, and three concentrations of sucrose (10, 20, and 30 g·L−1. Every three months, we evaluated the survival (%, shoot height, and shoot viability. In vitro conservation of the sweet potato genotypes IPB-052 and IPB-007 was obtained over three and six months, respectively, using MS medium plus 2.0 mg·L−1 of ABA at either 18 or 25°C. Genotypes IPB-072 and IPB-137 can be kept for three and six months, respectively, in MS medium without ABA at 18°C. It is possible to store IPB-052 and IPB-072 for six months and IPB-007 and IPB-137 for nine months using 30 g·L−1 of sucrose and 50% MS salts.

  9. The potential of plant viruses to promote genotypic diversity via genotype x environment interactions

    DEFF Research Database (Denmark)

    van Mölken, Tamara; Stuefer, Josef F.


    † Background and Aims Genotype by environment (G × E) interactions are important for the long-term persistence of plant species in heterogeneous environments. It has often been suggested that disease is a key factor for the maintenance of genotypic diversity in plant populations. However, empirical...... and the G × E interactions were examined with respect to genotypespecific plant responses to WClMV infection. Thus, the environment is defined as the presence or absence of the virus. † Key Results WClMV had a negative effect on plant performance as shown by a decrease in biomass and number of ramets...... evidence for this contention is scarce. Here virus infection is proposed as a possible candidate for maintaining genotypic diversity in their host plants. † Methods The effects of White clover mosaic virus (WClMV) on the performance and development of different Trifolium repens genotypes were analysed...

  10. Genotypic Variation of Early Maturing Soybean Genotypes for Phosphorus Utilization Efficiency under Field Grown Conditions

    Energy Technology Data Exchange (ETDEWEB)

    Abaidoo, R. C. [Kwame Nkrumah University of Technology, Kumasi (Ghana); International Institute of Tropical Agriculture, Ibadan (Nigeria); Opoku, A.; Boahen, S. [Kwame Nkrumah University of Technology, Kumasi (Ghana); Dare, M. O. [Federal University of Agriculture, Abeokuta (Nigeria)


    Variability in the utilization of phosphorus (P) by 64 early-maturing soybean (Glycine max L. Merr.) genotypes under low-P soil conditions were evaluated in 2009 and 2010 at Shika, Nigeria. Fifteen phenotypic variables; number of nodules, nodule dry weight, grain yield, plant biomass, total biomass, biomass N and P content, Phosphorus Utilization Index (PUI), shoot P Utilization efficiency (PUIS), grain P Utilization efficiency (PUIG), Harvest Index (HI), Biological N fixed (BNF), total N fixed and N and P uptake were measured. The four clusters revealed by cluster analysis were basically divided along (1) plant biomass and uptake, (2) nutrient acquisition and utilization and (3) nodulation components. Three early maturing genotypes, TGx1842-14E, TGx1912-11F and TGx1913-5F, were identified as having high P utilization index and low P uptake. These genotypes could be a potential source for breeding for P use efficiency in early maturing soybean genotypes. (author)

  11. Distribution of genotype network sizes in sequence-to-structure genotype-phenotype maps. (United States)

    Manrubia, Susanna; Cuesta, José A


    An essential quantity to ensure evolvability of populations is the navigability of the genotype space. Navigability, understood as the ease with which alternative phenotypes are reached, relies on the existence of sufficiently large and mutually attainable genotype networks. The size of genotype networks (e.g. the number of RNA sequences folding into a particular secondary structure or the number of DNA sequences coding for the same protein structure) is astronomically large in all functional molecules investigated: an exhaustive experimental or computational study of all RNA folds or all protein structures becomes impossible even for moderately long sequences. Here, we analytically derive the distribution of genotype network sizes for a hierarchy of models which successively incorporate features of increasingly realistic sequence-to-structure genotype-phenotype maps. The main feature of these models relies on the characterization of each phenotype through a prototypical sequence whose sites admit a variable fraction of letters of the alphabet. Our models interpolate between two limit distributions: a power-law distribution, when the ordering of sites in the prototypical sequence is strongly constrained, and a lognormal distribution, as suggested for RNA, when different orderings of the same set of sites yield different phenotypes. Our main result is the qualitative and quantitative identification of those features of sequence-to-structure maps that lead to different distributions of genotype network sizes. © 2017 The Author(s).

  12. Pollen diversity, viability and floral structure of some Musa genotypes

    African Journals Online (AJOL)

    Pollen diversity, viability and floral structure of some Musa genotypes. ... This experiment was designed to study the floral structure, pollen morphology and the potential pollen viability of five Musa genotypes obtained ... HOW TO USE AJOL.

  13. Behavior of durum wheat genotypes under normal irrigation and ...

    African Journals Online (AJOL)

    Behavior of durum wheat genotypes under normal irrigation and drought stress conditions in the greenhouse. ... African Journal of Biotechnology ... Genotypes were grouped in cluster analysis (using Ward's method) based on Yp, Ys and ...

  14. Genetic variability in cowpea (Vigna unguiculata (L.) Walp.) genotypes

    African Journals Online (AJOL)

    sive protein in human diets with grains containing about. 23–25% protein ... Keywords: heritability, phenotype, principal component analysis, variance. Introduction .... be due to genotype, environment, and the interaction of genotype and ...

  15. magnitude of genotype x environment interaction for bacterial leaf

    African Journals Online (AJOL)


    African Crop Science Journal, Vol. ... effects of treatments into genotype, environment, and genotype x environment (G x E) interactions. Results .... method is economically effective (Niño-Liu et al., ..... This phenomenon indicated differences in.

  16. Genotype 3 is the predominant hepatitis C genotype in a multi-ethnic Asian population in Malaysia. (United States)

    Ho, Shiaw-Hooi; Ng, Kee-Peng; Kaur, Harvinder; Goh, Khean-Lee


    Genotypes of hepatitis C virus (HCV) are distributed differently across the world. There is a paucity of such data in a multi-ethnic Asian population like Malaysia. The objectives of this study were to determine the distribution of HCV genotypes between major ethnic groups and to ascertain their association with basic demographic variables like age and gender. This was a cross-sectional prospective study conducted from September 2007 to September 2013. Consecutive patients who were detected to have anti-HCV antibodies in the University of Malaya Medical Centre were included and tested for the presence of HCV RNA using Roche Cobas Amplicor Analyzer and HCV genotype using Roche single Linear Array HCV Genotyping strip. Five hundred and ninety-six subjects were found to have positive anti-HCV antibodies during this period of time. However, only 396 (66.4%) were HCV RNA positive and included in the final analysis. Our results showed that HCV genotype 3 was the predominant genotype with overall frequency of 61.9% followed by genotypes 1 (35.9%), 2 (1.8%) and 6 (0.5%). There was a slightly higher prevalence of HCV genotype 3 among the Malays when compared to the Chinese (P=0.043). No other statistical significant differences were observed in the distribution of HCV genotypes among the major ethnic groups. There was also no association between the predominant genotypes and basic demographic variables. In a multi-ethnic Asian society in Malaysia, genotype 3 is the predominant genotype among all the major ethnic groups with genotype 1 as the second commonest genotype. Both genotypes 2 and 6 are uncommon. Neither genotype 4 nor 5 was detected. There is no identification of HCV genotype according to ethnic origin, age and gender.

  17. HPV genotypes in invasive cervical cancer in Danish women

    DEFF Research Database (Denmark)

    Kirschner, Benny; Junge, Jette; Holl, Katsiaryna


    Human papillomavirus (HPV) genotype distribution in invasive cervical cancers may differ by geographic region. The primary objective of this study was to estimate HPV-genotype distribution in Danish women with a diagnosis of invasive cervical cancer.......Human papillomavirus (HPV) genotype distribution in invasive cervical cancers may differ by geographic region. The primary objective of this study was to estimate HPV-genotype distribution in Danish women with a diagnosis of invasive cervical cancer....

  18. Evaluation of promising sweetpotato genotypes for high altitude ...

    African Journals Online (AJOL)

    The trials were set up to identify sweetpotato genotypes with adaptation to highland agroecologies with special reference to resistance to Ahemaria blight ... growth and at harvest, four genotypes and the local check, Magabari, bad high levels of resistance toA/Jemaria blight. Eight genotypes had total storage root yield ...

  19. Hepatitis B virus Genotypes in West Azarbayjan Province, Northwest Iran

    Directory of Open Access Journals (Sweden)

    Mohammad Hasan Khadem Ansari


    CONCLUSIONS: The results reveal that D genotype is the main genotype of HBV in West Azarbayjan province. Presence of this genotype conformed with the low rate of acute liver diseases caused by hepatitis B chronic infection, cirrhosis of the liver and hepatocellular carcinoma.

  20. Genotype-based personalised nutrition for obesity prevention and ...

    African Journals Online (AJOL)

    Typically, genotype-based personalised nutrition involves genotyping for a number of susceptibility SNPs associated with the prevention, or management, of a particular disease. Dietary advice is then personalised to the individual's genotype to ensure optimal prevention or treatment outcomes. To ensure evidence-based ...

  1. Introduction to a special issue on genotype by environment interaction (United States)

    Expression of a phenotype is a function of the genotype, the environment, and the differential sensitivity of certain genotypes to different environments, also known as genotype by environment (G × E) interaction. This special issue of Crop Science includes a collection of manuscripts that reviews t...

  2. Core Gene Expression and Association of Genotypes with Viral ...

    African Journals Online (AJOL)

    Purpose: To determine genotypic distribution, ribonucleic acid (RNA) RNA viral load and express core gene from Hepatitis C Virus (HCV) infected patients in Punjab, Pakistan. Methods: A total of 1690 HCV RNA positive patients were included in the study. HCV genotyping was tested by type-specific genotyping assay, viral ...

  3. Effect of Genotype and Age on Some Morphometric, Body Linear ...

    African Journals Online (AJOL)

    A population of 231 roosters of the Nigerian indigenous chickens of normal feathered frizzle feathered and naked neck genotypes was evaluated for the effect of genotype and age on some morphometric body linear measurements and semen characteristics of three Nigerian chicken genotypes. 20 roosters from each ...

  4. 21 CFR 862.3360 - Drug metabolizing enzyme genotyping system. (United States)


    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Drug metabolizing enzyme genotyping system. 862... Test Systems § 862.3360 Drug metabolizing enzyme genotyping system. (a) Identification. A drug metabolizing enzyme genotyping system is a device intended for use in testing deoxyribonucleic acid (DNA...

  5. Relationship of status of polymorphic rapd bands with genotypic ...

    African Journals Online (AJOL)

    Relationship of status of polymorphic rapd bands with genotypic adaptation in early finger millet genotypes. S Das, RC Misra, GR Rout, MC Pattanaik, S Aparajita. Abstract. Molecular characterisation of the 15 early duration finger millet (Eleusine coracana G) genotypes was done through RAPD markers. Twenty-five ...

  6. Genotype x Environment Interaction for Tuber Yield, Dry Matter ...

    African Journals Online (AJOL)

    A study was conducted to determine stability of tuber yield, dry matter content and specific gravity, and the nature and magnitude of genotype x environment (G x E) interaction in elite tetraploid potato genotypes. Eleven potato genotypes including two standard checks were evaluated in the eastern part of Ethiopia at ...

  7. [Evaluation of hepatitis B virus genotyping EIA kit]. (United States)

    Tanaka, Yasuhito; Sugauchi, Fuminaka; Matsuuraa, Kentaro; Naganuma, Hatsue; Tatematsu, Kanako; Takagi, Kazumi; Hiramatsu, Kumiko; Kani, Satomi; Gotoh, Takaaki; Wakimoto, Yukio; Mizokami, Masashi


    Clinical significance of Hepatitis B virus(HBV) genotyping is increasingly recognized. The aim of this study was to evaluate reproducibility, accuracy, and sensitivity of an enzyme immunoassay (EIA) based HBV genotyping kit, which designed to discriminate between genotypes to A, B, C, or D by detecting genotype-specific epitopes in PreS2 region. Using the four genotypes panels, the EIA demonstrated complete inter and intra-assay genotyping reproducibility. Serum specimens had stable results after 8 days at 4 degrees C, or 10 cycles of freezing-thawing. In 91 samples that have been genotyped by DNA sequencing, 87(95.6%) were in complete accordance with EIA genotyping. Of examined 344 HBsAg-positive serum specimens, genotypes A, B, C and D were determined in 26 (7.6%), 62 (18.0%), 228 (66.3%), and 9 (2.6%) cases, respectively. Of 19 (5.5%) specimens unclassified by the EIA, 13 were found to have low titer of HBsAg concentration (< 3 IU/ml), and the other 5 had amino acid mutations or deletions within targeted PreS2 epitopes. The EIA allowed genotyping even in HBV DNA negative samples (96.2%). In conclusion, HBV genotype EIA is reliable, sensitive and easy assay for HBV genotyping. The assay would be useful for clinical use.

  8. Genotype by environment interactions and yield stability of stem ...

    African Journals Online (AJOL)

    In a maize breeding program, potential genotypes are usually evaluated in different environments before desirable ones are selected. Genotype x environment (G x E) interaction is associated with the differential performance of genotypes tested at different locations and in different years, and influences selection and ...

  9. Genotype x environment interaction and stability analysis for yield ...

    African Journals Online (AJOL)

    Chickpea is the major pulse crop cultivated in Ethiopia. However, its production is constrained due to genotype instability and environmental variability. This research was carried out to examine the magnitude of environmental effect on yield of chickpea genotypes and to investigate the stability and adaptability of genotypes ...

  10. Reactions of some potato genotypes to late blight in Cameroon ...

    African Journals Online (AJOL)

    Reactions of some potato genotypes to late blight in Cameroon. D. K. Njualem, P. Demo, H. A. Mendoza, J. T. Koi, S. F. Nana. Abstract. Field experiments were conducted in Cameroon in 1995 and 1996 to evaluate reactions of different potato genotypes to late blight. There were significant differences among genotypes for ...

  11. Discovery of novel variants in genotyping arrays improves genotype retention and reduces ascertainment bias

    Directory of Open Access Journals (Sweden)

    Didion John P


    Full Text Available Abstract Background High-density genotyping arrays that measure hybridization of genomic DNA fragments to allele-specific oligonucleotide probes are widely used to genotype single nucleotide polymorphisms (SNPs in genetic studies, including human genome-wide association studies. Hybridization intensities are converted to genotype calls by clustering algorithms that assign each sample to a genotype class at each SNP. Data for SNP probes that do not conform to the expected pattern of clustering are often discarded, contributing to ascertainment bias and resulting in lost information - as much as 50% in a recent genome-wide association study in dogs. Results We identified atypical patterns of hybridization intensities that were highly reproducible and demonstrated that these patterns represent genetic variants that were not accounted for in the design of the array platform. We characterized variable intensity oligonucleotide (VINO probes that display such patterns and are found in all hybridization-based genotyping platforms, including those developed for human, dog, cattle, and mouse. When recognized and properly interpreted, VINOs recovered a substantial fraction of discarded probes and counteracted SNP ascertainment bias. We developed software (MouseDivGeno that identifies VINOs and improves the accuracy of genotype calling. MouseDivGeno produced highly concordant genotype calls when compared with other methods but it uniquely identified more than 786000 VINOs in 351 mouse samples. We used whole-genome sequence from 14 mouse strains to confirm the presence of novel variants explaining 28000 VINOs in those strains. We also identified VINOs in human HapMap 3 samples, many of which were specific to an African population. Incorporating VINOs in phylogenetic analyses substantially improved the accuracy of a Mus species tree and local haplotype assignment in laboratory mouse strains. Conclusion The problems of ascertainment bias and missing

  12. COMT genotype, gambling activity, and cognition

    DEFF Research Database (Denmark)

    Grant, Jon E; Leppink, Eric W; Redden, Sarah A


    adjustment and delay aversion) and the Spatial Working Memory task (total errors). This study adds to the growing literature on the role of COMT in impulsive behaviors by showing that the Val/Val genotype was associated with specific clinical and cognitive elements among young adults who gamble......Neuropsychological studies of adults with problem gambling indicate impairments across multiple cognitive domains. Catechol-O-methyltransferase (COMT) plays a unique role in the regulation of dopamine in the prefrontal cortex, and has been implicated in the cognitive dysfunction evident in problem...... gambling. This study examined adults with varying levels of gambling behavior to determine whether COMT genotype was associated with differences in gambling symptoms and cognitive functioning. 260 non-treatment-seeking adults aged 18-29 years with varying degrees of gambling behavior provided saliva...


    Directory of Open Access Journals (Sweden)

    Irina Ancu


    Full Text Available In Romania the blueberry breeding program started in 1982 and till now was conducted by dr. Paulina Mladin. For inducing the variability, different genetic resources of American blueberry cultivars (V. corymbosum, V. angustifolium were involved in a high number of crosses. For identify the genotype with the best fruit quality, some biometric quality indicators (average fruit weight, size index and basically chemical compounds of fruits including ascorbic acid, dry matter, ash, soluble solids, total sugar, titratable acidity, tanoid substances, pectic substances, protein crude, phosphorus and potassium were determined. Of the eleven chemical studied properties who reflected the fruits quality, for five of them were found no statistically significant differences. The purpose of this paper work was to evaluate fruit quality and to identify the valuable genotypes resulted from Romanian blueberry breeding program.

  14. BCL2 genotypes and prostate cancer survival

    Energy Technology Data Exchange (ETDEWEB)

    Renner, Wilfried [Medical University of Graz, Clinical Institute of Medical and Chemical Laboratory Diagnostics, Graz (Austria); Langsenlehner, Uwe [GKK Outpatient Department, Division of Internal Medicine, Graz (Austria); Krenn-Pilko, Sabine; Langsenlehner, Tanja [Medical University of Graz, Department of Therapeutic Radiology and Oncology, Graz (Austria); Eder, Petra [University Hospital Wuerzburg, Department of Internal Medicine I, Wuerzburg (Germany)


    The antiapoptotic B-cell lymphoma 2 (BCL2) gene is a key player in cancer development and progression. A functional single-nucleotide polymorphism (c.-938C>A, rs2279115) in the inhibitory P2 BCL2 gene promoter has been associated with clinical outcomes in various types of cancer. Aim of the present study was to analyze the role of BCL2-938C>A genotypes in prostate cancer mortality. The association between BCL2-938C>A (rs2279115) genotypes and prostate cancer outcome was studied within the prospective PROCAGENE study comprising 702 prostate cancer patients. During a median follow-up time of 92 months, 120 (17.1%) patients died. A univariate Cox regression model showed a significant association of the CC genotype with reduced cancer-specific survival (CSS; hazard ratio, HR, 2.13, 95% confidence interval, CI, 1.10-4.12; p = 0.024) and overall survival (OS; HR 2.34, 95% CI 1.58-3.47; p < 0.001). In a multivariate Cox regression model including age at diagnosis, risk group, and androgen deprivation therapy, the CC genotype remained a significant predictor of poor CSS (HR 2.05, 95% CI 1.05-3.99; p = 0.034) and OS (HR 2.25, 95% CI 1.51-3.36; p < 0.001). This study provides evidence that the homozygous BCL2-938 CC genotype is associated with OS and C in prostate cancer patients. (orig.) [German] Das antiapoptotische Gen B cell lymphoma 2 (BCL2) spielt eine Schluesselrolle in der Entstehung und Progression von Krebserkrankungen. Ein funktioneller Einzelnukleotid-Polymorphismus (c.-938C>A, rs2279115) im inhibitorischen P2-BCL2-Promotor wurde mit dem klinischen Outcome verschiedener Krebserkrankungen verknuepft. Ziel der vorliegenden Studie war die Untersuchung der Rolle von BCL2-938C>A-Genotypen fuer die Mortalitaet bei Patienten mit Prostatakarzinom. Der Zusammenhang zwischen BCL2-938C>A-Genotypen (rs2279115) und dem Outcome bei Prostatakrebs wurde in der prospektiven PROCAGENE-Studie, die 702 Patienten mit Prostatakarzinom umfasste, untersucht. Waehrend der medianen

  15. Novel approach for CES1 genotyping

    DEFF Research Database (Denmark)

    Bjerre, Ditte; Berg Rasmussen, Henrik


    AIM: Development of a specific procedure for genotyping of CES1A1 (CES1) and CES1A2, a hybrid of CES1A1 and the pseudogene CES1P1. MATERIALS & METHODS: The number of CES1A1 and CES1A2 copies and that of CES1P1 were determined using real-time PCR. Long range PCRs followed by secondary PCRs allowed...

  16. Screening cotton genotypes for seedling drought tolerance

    Directory of Open Access Journals (Sweden)

    Penna Julio C. Viglioni


    Full Text Available The objectives of this study were to adapt a screening method previously used to assess seedling drought tolerance in cereals for use in cotton (Gossypium hirsutum L. and to identify tolerant accessions among a wide range of genotypes. Ninety genotypes were screened in seven growth chamber experiments. Fifteen-day-old seedlings were subjected to four 4-day drought cycles, and plant survival was evaluated after each cycle. Three cycles are probably the minimum required in cotton work. Significant differences (at the 0.05 level or lower among entries were obtained in four of the seven experiments. A "confirmation test" with entries previously evaluated as "tolerant" (high survival and "susceptible" (low survival was run. A number of entries duplicated their earlier performance, but others did not, which indicates the need to reevaluate selections. Germplasms considered tolerant included: `IAC-13-1', `IAC-RM4-SM5', `Minas Sertaneja', `Acala 1517E-1' and `4521'. In general, the technique is simple, though time-consuming, with practical value for screening a large number of genotypes. Results from the screening tests generally agreed with field information. The screening procedure is suitable to select tolerant accessions from among a large number of entries in germplasm collections as a preliminary step in breeding for drought tolerance. This research also demonstrated the need to characterize the internal lack of uniformity in growth chambers to allow for adequate designs of experiments.

  17. Identification of zoonotic genotypes of Giardia duodenalis.

    Directory of Open Access Journals (Sweden)

    Hein Sprong

    Full Text Available Giardia duodenalis, originally regarded as a commensal organism, is the etiologic agent of giardiasis, a gastrointestinal disease of humans and animals. Giardiasis causes major public and veterinary health concerns worldwide. Transmission is either direct, through the faecal-oral route, or indirect, through ingestion of contaminated water or food. Genetic characterization of G. duodenalis isolates has revealed the existence of seven groups (assemblages A to G which differ in their host distribution. Assemblages A and B are found in humans and in many other mammals, but the role of animals in the epidemiology of human infection is still unclear, despite the fact that the zoonotic potential of Giardia was recognised by the WHO some 30 years ago. Here, we performed an extensive genetic characterization of 978 human and 1440 animal isolates, which together comprise 3886 sequences from 4 genetic loci. The data were assembled into a molecular epidemiological database developed by a European network of public and veterinary health Institutions. Genotyping was performed at different levels of resolution (single and multiple loci on the same dataset. The zoonotic potential of both assemblages A and B is evident when studied at the level of assemblages, sub-assemblages, and even at each single locus. However, when genotypes are defined using a multi-locus sequence typing scheme, only 2 multi-locus genotypes (MLG of assemblage A and none of assemblage B appear to have a zoonotic potential. Surprisingly, mixtures of genotypes in individual isolates were repeatedly observed. Possible explanations are the uptake of genetically different Giardia cysts by a host, or subsequent infection of an already infected host, likely without overt symptoms, with a different Giardia species, which may cause disease. Other explanations for mixed genotypes, particularly for assemblage B, are substantial allelic sequence heterogeneity and/or genetic recombination. Although the

  18. Identification of polymorphic inversions from genotypes

    Directory of Open Access Journals (Sweden)

    Cáceres Alejandro


    Full Text Available Abstract Background Polymorphic inversions are a source of genetic variability with a direct impact on recombination frequencies. Given the difficulty of their experimental study, computational methods have been developed to infer their existence in a large number of individuals using genome-wide data of nucleotide variation. Methods based on haplotype tagging of known inversions attempt to classify individuals as having a normal or inverted allele. Other methods that measure differences between linkage disequilibrium attempt to identify regions with inversions but unable to classify subjects accurately, an essential requirement for association studies. Results We present a novel method to both identify polymorphic inversions from genome-wide genotype data and classify individuals as containing a normal or inverted allele. Our method, a generalization of a published method for haplotype data 1, utilizes linkage between groups of SNPs to partition a set of individuals into normal and inverted subpopulations. We employ a sliding window scan to identify regions likely to have an inversion, and accumulation of evidence from neighboring SNPs is used to accurately determine the inversion status of each subject. Further, our approach detects inversions directly from genotype data, thus increasing its usability to current genome-wide association studies (GWAS. Conclusions We demonstrate the accuracy of our method to detect inversions and classify individuals on principled-simulated genotypes, produced by the evolution of an inversion event within a coalescent model 2. We applied our method to real genotype data from HapMap Phase III to characterize the inversion status of two known inversions within the regions 17q21 and 8p23 across 1184 individuals. Finally, we scan the full genomes of the European Origin (CEU and Yoruba (YRI HapMap samples. We find population-based evidence for 9 out of 15 well-established autosomic inversions, and for 52 regions

  19. Genotypic diversity of root and shoot characteristics of

    Directory of Open Access Journals (Sweden)

    ali ganjali


    Full Text Available Root and shoot characteristics of chickpea (Cicer arietinum L. genotypes are believed to be important in drought tolerance. There is a little information about the response of genotypes root growth in hydroponics and greenhouse culture, also the relationships between root size and drought tolerance. This study was conducted to observe whether genotypes differ in root size, and to see that root size is associated with drought tolerance during early vegetative growth. We found significant differences (p0.01 in root dry weight, total root length, tap root length, root area, leaf dry weight, leaf area and shoot biomass per plant among 30 genotypes of chickpea grown in hydroponics culture for three weeks. Each of these parameters correlated with all others, positively. Among 30 genotypes, 10 genotypes with different root sizes were selected and were grown in a greenhouse in sand culture experiment under drought stress (FC %30 for three weeks. There were not linear or non-linear significant correlations between root characters in hydroponics and greenhouse environments. It seems that environmental factors are dominant on genetic factors in seedling stage and so, the expression of genotypics potential for root growth characteristics of genotypes are different in hydroponic and greenhouse conditions. In this study, the selection of genotypes with vigorous roots system in hydroponic condition did not lead to genotypes with the same root characters in greenhouse environment. The genotype×drought interactions for root characters of chickpea seedlings in 30 days were not significant (p

  20. Performance of chickpea genotypes under Swat valley conditions

    International Nuclear Information System (INIS)

    Khan, A.; Rahim, M.; Ahmad, F.; Ali, A.


    Twenty-two genetically diverse chickpeas genotypes were studied for their physiological efficiency to select the most desirable genotype/genotypes for breeding program on chickpea. Genotype 'CM7-1' was found physiologically efficient stain with maximum harvest index (37.33%) followed by genotype 'CM1571-1-A' with harvest index of 35.73%. Genotype '90206' produced maximum biological yield (7463 kg ha/sup -1/) followed by genotypes 'CM31-1' and 'E-2034' with biological yield of 7352 and 7167 kg ha/sup -1/, respectively. Harvest index and economic yield showed significant positive correlation value of (r=+0.595), while negative correlation value of (r = -0.435) was observed between harvest index and biological yield. (author)

  1. Laboratory Information Management Software for genotyping workflows: applications in high throughput crop genotyping

    Directory of Open Access Journals (Sweden)

    Prasanth VP


    Full Text Available Abstract Background With the advances in DNA sequencer-based technologies, it has become possible to automate several steps of the genotyping process leading to increased throughput. To efficiently handle the large amounts of genotypic data generated and help with quality control, there is a strong need for a software system that can help with the tracking of samples and capture and management of data at different steps of the process. Such systems, while serving to manage the workflow precisely, also encourage good laboratory practice by standardizing protocols, recording and annotating data from every step of the workflow. Results A laboratory information management system (LIMS has been designed and implemented at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT that meets the requirements of a moderately high throughput molecular genotyping facility. The application is designed as modules and is simple to learn and use. The application leads the user through each step of the process from starting an experiment to the storing of output data from the genotype detection step with auto-binning of alleles; thus ensuring that every DNA sample is handled in an identical manner and all the necessary data are captured. The application keeps track of DNA samples and generated data. Data entry into the system is through the use of forms for file uploads. The LIMS provides functions to trace back to the electrophoresis gel files or sample source for any genotypic data and for repeating experiments. The LIMS is being presently used for the capture of high throughput SSR (simple-sequence repeat genotyping data from the legume (chickpea, groundnut and pigeonpea and cereal (sorghum and millets crops of importance in the semi-arid tropics. Conclusion A laboratory information management system is available that has been found useful in the management of microsatellite genotype data in a moderately high throughput genotyping

  2. Genotyping of Coxiella burnetii from domestic ruminants in northern Spain

    Directory of Open Access Journals (Sweden)

    Astobiza Ianire


    Full Text Available Abstract Background Information on the genotypic diversity of Coxiella burnetii isolates from infected domestic ruminants in Spain is limited. The aim of this study was to identify the C. burnetii genotypes infecting livestock in Northern Spain and compare them to other European genotypes. A commercial real-time PCR targeting the IS1111a insertion element was used to detect the presence of C. burnetii DNA in domestic ruminants from Spain. Genotypes were determined by a 6-loci Multiple Locus Variable number tandem repeat analysis (MLVA panel and Multispacer Sequence Typing (MST. Results A total of 45 samples from 4 goat herds (placentas, N = 4, 12 dairy cattle herds (vaginal mucus, individual milk, bulk tank milk, aerosols, N = 20 and 5 sheep flocks (placenta, vaginal swabs, faeces, air samples, dust, N = 21 were included in the study. Samples from goats and sheep were obtained from herds which had suffered abortions suspected to be caused by C. burnetii, whereas cattle samples were obtained from animals with reproductive problems compatible with C. burnetii infection, or consisted of bulk tank milk (BTM samples from a Q fever surveillance programme. C. burnetii genotypes identified in ruminants from Spain were compared to those detected in other countries. Three MLVA genotypes were found in 4 goat farms, 7 MLVA genotypes were identified in 12 cattle herds and 4 MLVA genotypes were identified in 5 sheep flocks. Clustering of the MLVA genotypes using the minimum spanning tree method showed a high degree of genetic similarity between most MLVA genotypes. Overall 11 different MLVA genotypes were obtained corresponding to 4 different MST genotypes: MST genotype 13, identified in goat, sheep and cattle from Spain; MST genotype 18, only identified in goats; and, MST genotypes 8 and 20, identified in small ruminants and cattle, respectively. All these genotypes had been previously identified in animal and human clinical samples from several

  3. Audioprofiles and antioxidant enzyme genotypes in presbycusis. (United States)

    Angeli, Simon I; Bared, Anthony; Ouyang, Xiaomei; Du, Li Lin; Yan, Denise; Zhong Liu, Xue


    Audiometric patterns have been shown to indirectly provide information regarding the pathophysiology of presbycusis and be useful in the phenotyping of hereditary deafness. Hospital-based cohort study of adults with presbycusis, comparing the association of audiometric patterns and polymorphisms of antioxidant enzymes that have been linked to presbycusis: GSTT1, GSTM1 and NAT2. All subjects underwent a clinical evaluation and completed questionnaires regarding ototoxicity and noise exposure. Pure-tone threshold audiometry was obtained and subjects' audiograms were classified into specific patterns. DNA was extracted from blood and the polymorphisms of GSTT1, GSTM1, and the NAT2 variants (NAT2* 5A; NAT2* 6A,B) were analyzed by PCR. The audiometric patterns that were more prevalent in our cohort were "High-Frequency Steeply Sloping" or HFSS (33%), "High-Frequency Gently Sloping" or HFGS (31%), and "Flat" (27%), with other patterns being rare. We did not find a statistical significant effect of gender, age, hearing level, and ear side on the audiometric pattern. Subjects with mutant alleles for GSTT1 were more likely to have a HFSS audiogram than subjects with the wild type genotype. In this cohort, there was a similar prevalence for the three audiometric configurations HFSS, HFGS, and Flat, with other configurations being rare. Subjects with mutant alleles for GSTT1 were more likely to have a HFSS audiogram than subjects with the wild type genotype, suggesting that the basal turn of the cochlea is susceptible to GSTT1 regulated oxidative stress. However, further studies of audioprofiles with larger sample sizes may be needed to establish phenotype-genotype correlations in presbycusis. Copyright © 2012 The American Laryngological, Rhinological, and Otological Society, Inc.

  4. Plant genotypic diversity reduces the rate of consumer resource utilization. (United States)

    McArt, Scott H; Thaler, Jennifer S


    While plant species diversity can reduce herbivore densities and herbivory, little is known regarding how plant genotypic diversity alters resource utilization by herbivores. Here, we show that an invasive folivore--the Japanese beetle (Popillia japonica)--increases 28 per cent in abundance, but consumes 24 per cent less foliage in genotypic polycultures compared with monocultures of the common evening primrose (Oenothera biennis). We found strong complementarity for reduced herbivore damage among plant genotypes growing in polycultures and a weak dominance effect of particularly resistant genotypes. Sequential feeding by P. japonica on different genotypes from polycultures resulted in reduced consumption compared with feeding on different plants of the same genotype from monocultures. Thus, diet mixing among plant genotypes reduced herbivore consumption efficiency. Despite positive complementarity driving an increase in fruit production in polycultures, we observed a trade-off between complementarity for increased plant productivity and resistance to herbivory, suggesting costs in the complementary use of resources by plant genotypes may manifest across trophic levels. These results elucidate mechanisms for how plant genotypic diversity simultaneously alters resource utilization by both producers and consumers, and show that population genotypic diversity can increase the resistance of a native plant to an invasive herbivore.

  5. Relationship of some upland rice genotype after gamma irradiation (United States)

    Suliartini, N. W. S.; Wijayanto, T.; Madiki, A.; Boer, D.; Muhidin; Juniawan


    The objective of the research was to group local upland rice genotypes after being treated with gamma irradiation. The research materials were upland rice genotypes resulted from mutation of the second generation and two parents: Pae Loilo (K3D0) and Pae Pongasi (K2D0) Cultivars. The research was conducted at the Indonesian Sweetener and Fiber Crops Research Institute, Malang Regency, and used the augmented design method. Research data were analyzed with R Program. Eight hundred and seventy one genotypes were selected with the selection criteria were based on yields on the average parents added 1.5 standard deviation. Based on the selection, eighty genotypes were analyzed with cluster analyses. Nine observation variables were used to develop cluster dendrogram using average linked method. Genetic distance was measured by euclidean distance. The results of cluster dendrogram showed that tested genotypes were divided into eight groups. Group 1, 2, 7, and 8 each had one genotype, group 3 and 6 each had two genotypes, group 4 had 25 genotypes, and group 5 had 51 genotypes. Check genotypes formed a separate group. Group 6 had the highest yield per plant of 126.11 gram, followed by groups 5 and 4 of 97.63 and 94.08 gram, respectively.

  6. Linking genotypes database with locus-specific database and genotype-phenotype correlation in phenylketonuria. (United States)

    Wettstein, Sarah; Underhaug, Jarl; Perez, Belen; Marsden, Brian D; Yue, Wyatt W; Martinez, Aurora; Blau, Nenad


    The wide range of metabolic phenotypes in phenylketonuria is due to a large number of variants causing variable impairment in phenylalanine hydroxylase function. A total of 834 phenylalanine hydroxylase gene variants from the locus-specific database PAHvdb and genotypes of 4181 phenylketonuria patients from the BIOPKU database were characterized using FoldX, SIFT Blink, Polyphen-2 and SNPs3D algorithms. Obtained data was correlated with residual enzyme activity, patients' phenotype and tetrahydrobiopterin responsiveness. A descriptive analysis of both databases was compiled and an interactive viewer in PAHvdb database was implemented for structure visualization of missense variants. We found a quantitative relationship between phenylalanine hydroxylase protein stability and enzyme activity (r(s) = 0.479), between protein stability and allelic phenotype (r(s) = -0.458), as well as between enzyme activity and allelic phenotype (r(s) = 0.799). Enzyme stability algorithms (FoldX and SNPs3D), allelic phenotype and enzyme activity were most powerful to predict patients' phenotype and tetrahydrobiopterin response. Phenotype prediction was most accurate in deleterious genotypes (≈ 100%), followed by homozygous (92.9%), hemizygous (94.8%), and compound heterozygous genotypes (77.9%), while tetrahydrobiopterin response was correctly predicted in 71.0% of all cases. To our knowledge this is the largest study using algorithms for the prediction of patients' phenotype and tetrahydrobiopterin responsiveness in phenylketonuria patients, using data from the locus-specific and genotypes database.

  7. Antioxidant capacity of anthocyanins from acerola genotypes

    Directory of Open Access Journals (Sweden)

    Vera Lúcia Arroxelas Galvão De Lima


    Full Text Available Anthocyanins from 12 acerola genotypes cultivated at the Active Germplasm Bank at Federal Rural University of Pernambuco were isolated for antioxidant potential evaluation. The antioxidant activity and radical scavenging capacity of the anthocyanin isolates were measured according to the β-carotene bleaching method and 1,1-diphenyl-2-picrylhydrazyl (DPPH free radical scavenging assay, respectively. The antioxidant activity varied from 25.58 to 47.04% at 0.2 mg.mL-1, and it was measured using the β-carotene bleaching method. The free radical scavenging capacity increased according to the increase in concentration and reaction time by the DPPH assay. At 16.7 μg.mL-1 concentration and after 5 minutes and 2 hours reaction time, the percentage of scavenged radicals varied from 36.97 to 63.92% and 73.27 to 94.54%, respectively. Therefore, the antioxidant capacity of acerola anthocyanins varied amongst acerola genotypes and methods used. The anthocyanins present in this fruit may supply substantial dietary source of antioxidant which may promote health and produce disease prevention effects.

  8. [Mexican phenotype and genotype Vibrio cholerae 01]. (United States)

    Giono, S; Gutiérrez Cogno, L; Rodríguez Angeles, G; del Rio Zolezzi, A; Valdespino González, J L; Sepúlveda Amor, J


    This paper presents the phenotypical and genotypical characterization of 26922 Vibrio cholerae 01 strains isolated in Mexico from 1991 to 1993. All strains isolated were El Tor biovar. Strains were sensitive to antibiotics excluding furazolidone, streptomycin and sulfisoxasole to which we found resistance in 97% and we are using this characteristic as epidemiological markers. We detected a marked change in frequency of Inaba serotype from 1991, when it was dominant, with 99.5%, until 1992 when Ogawa serotype turned to be dominant with 95% of isolates. All Vibrio cholerae 01 strains, except one Ogawa strain, were to igenic, and V. choleraeno 01 were not toxigenic by ELISA, PCR and cell culture tests. Dominant ribotype was 5, but we found some strains with 6a pattern and two with ribotype 12. We are searching for ribotype 2 among hemolytic strains in order to learn if there is any relation to Gulf Coast strains prevalent in the USA, but until now we have not found any V. cholerae ribotype 2 in our isolates. Even if rapid tests are recommended for immediate diagnosis of cholera, it is necessary to continue bacterial isolation in order to have strains for phenotyping and genotyping studies that may support epidemiological analysis.

  9. HFE genotype affects exosome phenotype in cancer. (United States)

    Mrowczynski, Oliver D; Madhankumar, A B; Slagle-Webb, Becky; Lee, Sang Y; Zacharia, Brad E; Connor, James R


    Neuroblastoma is the third most common childhood cancer, and timely diagnosis and sensitive therapeutic monitoring remain major challenges. Tumor progression and recurrence is common with little understanding of mechanisms. A major recent focus in cancer biology is the impact of exosomes on metastatic behavior and the tumor microenvironment. Exosomes have been demonstrated to contribute to the oncogenic effect on the surrounding tumor environment and also mediate resistance to therapy. The effect of genotype on exosomal phenotype has not yet been explored. We interrogated exosomes from human neuroblastoma cells that express wild-type or mutant forms of the HFE gene. HFE, one of the most common autosomal recessive polymorphisms in the Caucasian population, originally associated with hemochromatosis, has also been associated with increased tumor burden, therapeutic resistance boost, and negative impact on patient survival. Herein, we demonstrate that changes in genotype cause major differences in the molecular and functional properties of exosomes; specifically, HFE mutant derived exosomes have increased expression of proteins relating to invasion, angiogenesis, and cancer therapeutic resistance. HFE mutant derived exosomes were also shown to transfer this cargo to recipient cells and cause an increased oncogenic functionality in those recipient cells. Copyright © 2017. Published by Elsevier B.V.

  10. Haplotype-Based Genotyping in Polyploids

    Directory of Open Access Journals (Sweden)

    Josh P. Clevenger


    Full Text Available Accurate identification of polymorphisms from sequence data is crucial to unlocking the potential of high throughput sequencing for genomics. Single nucleotide polymorphisms (SNPs are difficult to accurately identify in polyploid crops due to the duplicative nature of polyploid genomes leading to low confidence in the true alignment of short reads. Implementing a haplotype-based method in contrasting subgenome-specific sequences leads to higher accuracy of SNP identification in polyploids. To test this method, a large-scale 48K SNP array (Axiom Arachis2 was developed for Arachis hypogaea (peanut, an allotetraploid, in which 1,674 haplotype-based SNPs were included. Results of the array show that 74% of the haplotype-based SNP markers could be validated, which is considerably higher than previous methods used for peanut. The haplotype method has been implemented in a standalone program, HAPLOSWEEP, which takes as input bam files and a vcf file and identifies haplotype-based markers. Haplotype discovery can be made within single reads or span paired reads, and can leverage long read technology by targeting any length of haplotype. Haplotype-based genotyping is applicable in all allopolyploid genomes and provides confidence in marker identification and in silico-based genotyping for polyploid genomics.

  11. Hearing impairment in genotyped Wolfram syndrome patients. (United States)

    Plantinga, Rutger F; Pennings, Ronald J E; Huygen, Patrick L M; Bruno, Rocco; Eller, Philipp; Barrett, Timothy G; Vialettes, Bernard; Paquis-Fluklinger, Veronique; Lombardo, Fortunato; Cremers, Cor W R J


    Wolfram syndrome is a progressive neurodegenerative syndrome characterized by the features "DIDMOAD" (diabetes insipidus, diabetes mellitus, optic atrophy, and deafness). We sought to study the audiometric data of genotyped Wolfram syndrome patients with sensorineural hearing impairment. Pure tone threshold data of 23 Wolfram syndrome patients were used for cross-sectional analysis in subgroups (age less than 16 years or between 19 and 25 years, gender, and origin). All subgroups, with 1 exception, showed a fairly similar type of hearing impairment with, on average, thresholds of about 25 dB (range, 0 to 65 dB) at 0.25 to 1 kHz, gently sloping downward to about 60 dB (range, 25 to 95 dB) at 8 kHz. The subgroup of Dutch women, which was excluded from the calculations of the average hearing thresholds, showed a higher degree of hearing impairment. Only the latter subgroup showed progression; however, contrary to the previous longitudinal analysis, progression was not significant in the present cross-sectional analysis, presumably because of the high degree of cross-subject variability. This unique collection of audiometric data from genotyped Wolfram syndrome patients shows no substantial progression in sensorineural hearing impairment with advancing age, no relation to the types of WFS1 mutations identified, and, with exclusion of the subgroup of Dutch female patients, no significant sex-related differences.

  12. Deep sequencing analysis of HBV genotype shift and correlation with antiviral efficiency during adefovir dipivoxil therapy.

    Directory of Open Access Journals (Sweden)

    Yuwei Wang

    Full Text Available Viral genotype shift in chronic hepatitis B (CHB patients during antiviral therapy has been reported, but the underlying mechanism remains elusive.38 CHB patients treated with ADV for one year were selected for studying genotype shift by both deep sequencing and Sanger sequencing method.Sanger sequencing method found that 7.9% patients showed mixed genotype before ADV therapy. In contrast, all 38 patients showed mixed genotype before ADV treatment by deep sequencing. 95.5% mixed genotype rate was also obtained from additional 200 treatment-naïve CHB patients. Of the 13 patients with genotype shift, the fraction of the minor genotype in 5 patients (38% increased gradually during the course of ADV treatment. Furthermore, responses to ADV and HBeAg seroconversion were associated with the high rate of genotype shift, suggesting drug and immune pressure may be key factors to induce genotype shift. Interestingly, patients with genotype C had a significantly higher rate of genotype shift than genotype B. In genotype shift group, ADV treatment induced a marked enhancement of genotype B ratio accompanied by a reduction of genotype C ratio, suggesting genotype C may be more sensitive to ADV than genotype B. Moreover, patients with dominant genotype C may have a better therapeutic effect. Finally, genotype shifts was correlated with clinical improvement in terms of ALT.Our findings provided a rational explanation for genotype shift among ADV-treated CHB patients. The genotype and genotype shift might be associated with antiviral efficiency.

  13. The genotype-phenotype map of an evolving digital organism


    Fortuna, Miguel A.; Zaman, Luis; Ofria, Charles; Wagner, Andreas


    To understand how evolving systems bring forth novel and useful phenotypes, it is essential to understand the relationship between genotypic and phenotypic change. Artificial evolving systems can help us understand whether the genotype-phenotype maps of natural evolving systems are highly unusual, and it may help create evolvable artificial systems. Here we characterize the genotype-phenotype map of digital organisms in Avida, a platform for digital evolution. We consider digital organisms fr...

  14. Molecular genotyping of HCV infection in seropositive blood donor (United States)

    Zarin, Siti Noraziah Abu; Ibrahim, Nazlina


    This study is to investigate the prevalence of hepatitis C virus infection in seropositive blood donor. RNA was extracted from 32 positive samples in National Blood Centre and Melaka Hospital. The core and NS5B sequences were obtained from 23 samples. Genotype 3a is most prevalent in this study followed by genotype 1a. Evidence of mixed-genotypes (3a and 1b) infections was found in 5 subjects.

  15. MBL2 gene variants coding for mannose-binding lectin deficiency are associated with increased risk of nephritis in Danish patients with systemic lupus erythematosus

    DEFF Research Database (Denmark)

    Tanha, N; Troelsen, L; From Hermansen, M-L


    .2-5.5) higher risk of developing nephritis, and their risk of death after 10 years was 6.0 times increased (95% CI: 1.0-36). MBL serum levels below 100 ng/ml were associated with a 2.0 (95% CI: 1.2-3.4; p = 0.007) increased risk of developing nephritis. ESRD and histological class of nephritis were...

  16. Genomic Variants Revealed by Invariably Missing Genotypes in Nelore Cattle.

    Directory of Open Access Journals (Sweden)

    Joaquim Manoel da Silva

    Full Text Available High density genotyping panels have been used in a wide range of applications. From population genetics to genome-wide association studies, this technology still offers the lowest cost and the most consistent solution for generating SNP data. However, in spite of the application, part of the generated data is always discarded from final datasets based on quality control criteria used to remove unreliable markers. Some discarded data consists of markers that failed to generate genotypes, labeled as missing genotypes. A subset of missing genotypes that occur in the whole population under study may be caused by technical issues but can also be explained by the presence of genomic variations that are in the vicinity of the assayed SNP and that prevent genotyping probes from annealing. The latter case may contain relevant information because these missing genotypes might be used to identify population-specific genomic variants. In order to assess which case is more prevalent, we used Illumina HD Bovine chip genotypes from 1,709 Nelore (Bos indicus samples. We found 3,200 missing genotypes among the whole population. NGS re-sequencing data from 8 sires were used to verify the presence of genomic variations within their flanking regions in 81.56% of these missing genotypes. Furthermore, we discovered 3,300 novel SNPs/Indels, 31% of which are located in genes that may affect traits of importance for the genetic improvement of cattle production.

  17. Phosphorus use efficiency in pima cotton (Gossypium barbadense L. genotypes

    Directory of Open Access Journals (Sweden)

    Elcio Santos


    Full Text Available In the Brazilian Cerrado, P deficiency restricts cotton production, which requires large amounts of phosphate fertilizer. To improve the yield of cotton crops, genotypes with high P use efficiency must be identified and used. The present study evaluated P uptake and use efficiency of different Gossypium barbadense L. genotypes grown in the Cerrado. The experiment was carried out in a greenhouse with a completely randomized design, 15 x 2 factorial treatment structure (15 genotypes x 2 P levels, and four replicates. The genotypes were MT 69, MT 70, MT 87, MT 91, MT 92, MT 94, MT 101, MT 102, MT 103, MT 105, MT 106, MT 110, MT 112, MT 124, and MT 125; P levels were sufficient (1000 mg pot-1, PS treatment or deficient (PD treatment. Dry matter (DM and P levels were determined in cotton plant parts and used to calculate plant P content and use efficiency. In general, DM and P content were higher in the PS than in the PD treatment, with the exception of root DM and total DM in some genotypes. Genotypes also differed in terms of P uptake and use capacity. In the PS treatment, genotypes MT 92 and MT 102 had the highest response to phosphate fertilization. Genotype MT 69 exhibited the most efficient P uptake in the PD treatment. Genotype MT 124 showed the best shoot physiological efficiency, apparent recovery efficiency, and utilization efficiency, whereas MT 110 exhibited the highest root physiological efficiency.

  18. Welcome to the neighbourhood: interspecific genotype by genotype interactions in Solidago influence above- and belowground biomass and associated communities. (United States)

    Genung, Mark A; Bailey, Joseph K; Schweitzer, Jennifer A


    Intra- and interspecific plant-plant interactions are fundamental to patterns of community assembly and to the mixture effects observed in biodiversity studies. Although much research has been conducted at the species level, very little is understood about how genetic variation within and among interacting species may drive these processes. Using clones of both Solidago altissima and Solidago gigantea, we found that genotypic variation in a plant's neighbours affected both above- and belowground plant traits, and that genotype by genotype interactions between neighbouring plants impacted associated pollinator communities. The traits for which focal plant genotypic variation explained the most variation varied by plant species, whereas neighbour genotypic variation explained the most variation in coarse root biomass. Our results provide new insight into genotypic and species diversity effects in plant-neighbour interactions, the extended consequences of diversity effects, and the potential for evolution in response to competitive or to facilitative plant-neighbour interactions. © 2011 Blackwell Publishing Ltd/CNRS.

  19. Plant genotype, microbial recruitment and nutritional security. (United States)

    Patel, Jai S; Singh, Akanksha; Singh, Harikesh B; Sarma, Birinchi K


    Agricultural food products with high nutritional value should always be preferred over food products with low nutritional value. Efforts are being made to increase nutritional value of food by incorporating dietary supplements to the food products. The same is more desirous if the nutritional value of food is increased under natural environmental conditions especially in agricultural farms. Fragmented researches have demonstrated possibilities in achieving the same. The rhizosphere is vital in this regard for not only health and nutritional status of plants but also for the microorganisms colonizing the rhizosphere. Remarkably robust composition of plant microbiome with respect to other soil environments clearly suggests the role of a plant host in discriminating its colonizers (Zancarini et al., 2012). A large number of biotic and abiotic factors are believed to manipulate the microbial communities in the rhizosphere. However, plant genotype has proven to be the key in giving the final shape of the rhizosphere microbiome (Berendsen et al., 2012; Marques et al., 2014).

  20. Sources of Wilhelm Johannsen's genotype theory. (United States)

    Roll-Hansen, Nils


    This paper describes the historical background and early formation of Wilhelm Johannsen's distinction between genotype and phenotype. It is argued that contrary to a widely accepted interpretation (For instance, W. Provine, 1971. The Origins of Theoretical Population Genetics. Chicago: The University of Chicago Press; Mayr, 1973; F. B. Churchill, 1974. Journal of the History of Biology 7: 5-30; E. Mayr, 1982. The Growth of Biological Thought, Cambridge: Harvard University Press; J. Sapp, 2003. Genesis. The Evolution of Biology. New York: Oxford University Press) his concepts referred primarily to properties of individual organisms and not to statistical averages. Johannsen's concept of genotype was derived from the idea of species in the tradition of biological systematics from Linnaeus to de Vries: An individual belonged to a group - species, subspecies, elementary species - by representing a certain underlying type (S. Müller-Wille and V. Orel, 2007. Annals of Science 64: 171-215). Johannsen sharpened this idea theoretically in the light of recent biological discoveries, not least those of cytology. He tested and confirmed it experimentally combining the methods of biometry, as developed by Francis Galton, with the individual selection method and pedigree analysis, as developed for instance by Louis Vilmorin. The term "genotype" was introduced in W. Johannsen's 1909 (Elemente der Exakten Erblichkeitslehre. Jena: Gustav Fischer) treatise, but the idea of a stable underlying biological "type" distinct from observable properties was the core idea of his classical bean selection experiment published 6 years earlier (W. Johannsen, 1903. Ueber Erblichkeit in Populationen und reinen Linien. Eine Beitrag zur Beleuchtung schwebender Selektionsfragen, Jena: Gustav Fischer, pp. 58-59). The individual ontological foundation of population analysis was a self-evident presupposition in Johannsen's studies of heredity in populations from their start in the early 1890s till his

  1. Identification of Zoonotic Genotypes of Giardia duodenalis

    DEFF Research Database (Denmark)

    Sprong, H.; Cacciò, S.M.; van der Giessen, J.W.B


    Giardia duodenalis, originally regarded as a commensal organism, is the etiologic agent of giardiasis, a gastrointestinal disease of humans and animals. Giardiasis causes major public and veterinary health concerns worldwide. Transmission is either direct, through the faecal-oral route, or indirect......, through ingestion of contaminated water or food. Genetic characterization of G. duodenalis isolates has revealed the existence of seven groups (assemblages A to G) which differ in their host distribution. Assemblages A and B are found in humans and in many other mammals, but the role of animals......, mixtures of genotypes in individual isolates were repeatedly observed. Possible explanations are the uptake of genetically different Giardia cysts by a host, or subsequent infection of an already infected host, likely without overt symptoms, with a different Giardia species, which may cause disease. Other...

  2. Automated genotyping of dinucleotide repeat markers

    Energy Technology Data Exchange (ETDEWEB)

    Perlin, M.W.; Hoffman, E.P. [Carnegie Mellon Univ., Pittsburgh, PA (United States)]|[Univ. of Pittsburgh, PA (United States)


    The dinucleotide repeats (i.e., microsatellites) such as CA-repeats are a highly polymorphic, highly abundant class of PCR-amplifiable markers that have greatly streamlined genetic mapping experimentation. It is expected that over 30,000 such markers (including tri- and tetranucleotide repeats) will be characterized for routine use in the next few years. Since only size determination, and not sequencing, is required to determine alleles, in principle, dinucleotide repeat genotyping is easily performed on electrophoretic gels, and can be automated using DNA sequencers. Unfortunately, PCR stuttering with these markers generates not one band for each allele, but a pattern of bands. Since closely spaced alleles must be disambiguated by human scoring, this poses a key obstacle to full automation. We have developed methods that overcome this obstacle. Our model is that the observed data is generated by arithmetic superposition (i.e., convolution) of multiple allele patterns. By quantitatively measuring the size of each component band, and exploiting the unique stutter pattern associated with each marker, closely spaced alleles can be deconvolved; this unambiguously reconstructs the {open_quotes}true{close_quotes} allele bands, with stutter artifact removed. We used this approach in a system for automated diagnosis of (X-linked) Duchenne muscular dystrophy; four multiplexed CA-repeats within the dystrophin gene were assayed on a DNA sequencer. Our method accurately detected small variations in gel migration that shifted the allele size estimate. In 167 nonmutated alleles, 89% (149/167) showed no size variation, 9% (15/167) showed 1 bp variation, and 2% (3/167) showed 2 bp variation. We are currently developing a library of dinucleotide repeat patterns; together with our deconvolution methods, this library will enable fully automated genotyping of dinucleotide repeats from sizing data.

  3. Improved Ancestry Estimation for both Genotyping and Sequencing Data using Projection Procrustes Analysis and Genotype Imputation (United States)

    Wang, Chaolong; Zhan, Xiaowei; Liang, Liming; Abecasis, Gonçalo R.; Lin, Xihong


    Accurate estimation of individual ancestry is important in genetic association studies, especially when a large number of samples are collected from multiple sources. However, existing approaches developed for genome-wide SNP data do not work well with modest amounts of genetic data, such as in targeted sequencing or exome chip genotyping experiments. We propose a statistical framework to estimate individual ancestry in a principal component ancestry map generated by a reference set of individuals. This framework extends and improves upon our previous method for estimating ancestry using low-coverage sequence reads (LASER 1.0) to analyze either genotyping or sequencing data. In particular, we introduce a projection Procrustes analysis approach that uses high-dimensional principal components to estimate ancestry in a low-dimensional reference space. Using extensive simulations and empirical data examples, we show that our new method (LASER 2.0), combined with genotype imputation on the reference individuals, can substantially outperform LASER 1.0 in estimating fine-scale genetic ancestry. Specifically, LASER 2.0 can accurately estimate fine-scale ancestry within Europe using either exome chip genotypes or targeted sequencing data with off-target coverage as low as 0.05×. Under the framework of LASER 2.0, we can estimate individual ancestry in a shared reference space for samples assayed at different loci or by different techniques. Therefore, our ancestry estimation method will accelerate discovery in disease association studies not only by helping model ancestry within individual studies but also by facilitating combined analysis of genetic data from multiple sources. PMID:26027497

  4. Genotypic and phenotypic characterization of Chikungunya virus of different genotypes from Malaysia.

    Directory of Open Access Journals (Sweden)

    I-Ching Sam

    Full Text Available BACKGROUND: Mosquito-borne Chikungunya virus (CHIKV has recently re-emerged globally. The epidemic East/Central/South African (ECSA strains have spread for the first time to Asia, which previously only had endemic Asian strains. In Malaysia, the ECSA strain caused an extensive nationwide outbreak in 2008, while the Asian strains only caused limited outbreaks prior to this. To gain insight into these observed epidemiological differences, we compared genotypic and phenotypic characteristics of CHIKV of Asian and ECSA genotypes isolated in Malaysia. METHODS AND FINDINGS: CHIKV of Asian and ECSA genotypes were isolated from patients during outbreaks in Bagan Panchor in 2006, and Johor in 2008. Sequencing of the CHIKV strains revealed 96.8% amino acid similarity, including an unusual 7 residue deletion in the nsP3 protein of the Asian strain. CHIKV replication in cells and Aedes mosquitoes was measured by virus titration. There were no differences in mammalian cell lines. The ECSA strain reached significantly higher titres in Ae. albopictus cells (C6/36. Both CHIKV strains infected Ae. albopictus mosquitoes at a higher rate than Ae. aegypti, but when compared to each other, the ECSA strain had much higher midgut infection and replication, and salivary gland dissemination, while the Asian strain infected Ae. aegypti at higher rates. CONCLUSIONS: The greater ability of the ECSA strain to replicate in Ae. albopictus may explain why it spread far more quickly and extensively in humans in Malaysia than the Asian strain ever did, particularly in rural areas where Ae. albopictus predominates. Intergenotypic genetic differences were found at E1, E2, and nsP3 sites previously reported to be determinants of host adaptability in alphaviruses. Transmission of CHIKV in humans is influenced by virus strain and vector species, which has implications for regions with more than one circulating CHIKV genotype and Aedes species.

  5. Methods for discovering and validating relationships among genotyped animals (United States)

    Genomic selection based on single-nucleotide polymorphisms (SNPs) has led to the collection of genotypes for over 2.2 million animals by the Council on Dairy Cattle Breeding in the United States. To assure that a genotype is assigned to the correct animal and that the animal’s pedigree is correct, t...

  6. Variation of meat quality traits among five genotypes of chicken. (United States)

    Tang, H; Gong, Y Z; Wu, C X; Jiang, J; Wang, Y; Li, K


    The main objective of this study was to examine the diversity of meat quality traits among 5 chicken genotypes. The genotypes included 2 Chinese native breeds (Wenchang,WCH, and Xianju), 1 commercial broiler line (Avian, AV), 1 commercial layer line (Hy-Line Brown, HLB), and 1 Chinese commercial broiler line (Lingnanhuang, LNH) synthesized by exotic and native breeds, which were slaughtered at their market ages: 16, 7, 16, and 8 wk, respectively. The effects of genotype, muscle type, and sex on meat quality traits were examined. Birds from slow-growing genotypes (WCH, Xianju, and HLB) exhibited higher shear value, inosine-5'-monophosphate concentration, lower cook loss, and more fat than those from fast-growing genotypes (AV and LNH). Chickens from WCH possessed the lowest expressible moisture, cook loss, and the highest lipid (%) among the 3 slow-growing genotypes. The HLB birds were intermediate in expressible moisture and cook loss and lowest in lipid among all genotypes. The LNH cross birds were similar to AV broilers in most meat quality parameters, although they had a lower shear force value and higher fat content than AV broilers. Breast muscle had higher expressible moisture, shear force, protein (%), inosine-5'-monophosphate content, lower cook loss, and lipid (%) than leg muscle. Muscles from male chickens had higher expressible moisture than those from the females. Variability of meat quality characteristics is mainly related to genotype and muscle type differences.

  7. Screening of Wheat Genotypes for Boron Efficiency in Bangladesh (United States)

    A number of Bangladeshi wheat genotypes (varieties and advanced lines) have been tested for boron efficiency through sand culture experiments over two years (2007-08 & 2008-09) against two Thai check varieties ‘Fang 60’ (boron efficient) and ‘SW41’ (boron inefficient). Performances of the genotypes ...

  8. Crossbreeding of large white and Nsukka local pigs: Genotype and ...

    African Journals Online (AJOL)

    5-Blood samples from 80 pigs of 4 genotypes - the Nsukka local (Lo), the exotic Large White (LW), the one-way F1 (LW x Lo) and the F2 crosses belonging to 5 age groups, were analyzed, to determine the mean values of the haematological parameters in the genotypes and different age groups and to check if and how the ...

  9. Enhanced fodder yield of maize genotypes under saline irrigation is ...

    African Journals Online (AJOL)

    Poor quality irrigation water adversely affects the growth and yield of crops. This study was designed to evaluate the growth, fodder yield and ionic concentration of three promising maize (Zea mays L.) genotypes under the influence of varying quality irrigation water, with different salinity levels. The genotypes, such as ...

  10. Breeding of a Tomato Genotype Readily Accessible to Genetic Manipulation

    NARCIS (Netherlands)

    Koornneef, Maarten; Hanhart, Corrie; Jongsma, Maarten; Toma, Ingrid; Weide, Rob; Zabel, Pim; Hille, Jacques


    A tomato genotype, superior in regenerating plants from cell cultures, was obtained by transferring regeneration capacity from Lycopersicon peruvianum into L. esculentum by classical breeding. This genotype, MsK93, greatly facilitates genetic manipulation of tomato, as was demonstrated by successful

  11. Application of mixed models for the assessment genotype and ...

    African Journals Online (AJOL)

    Application of mixed models for the assessment genotype and environment interactions in cotton ( Gossypium hirsutum ) cultivars in Mozambique. ... The cultivars ISA 205, STAM 42 and REMU 40 showed superior productivity when they were selected by the Harmonic Mean of Genotypic Values (HMGV) criterion in relation ...

  12. The influence of host genotype X environment Interactions on the ...

    African Journals Online (AJOL)

    Mean squares for environments, genotypes and G x E interactions were highly significant (P<0.0001) for anthracnose infection. Significant G x E interactions, accounting for 19% of the treatment sums of squares, indicated that genotypes responded differentially to anthracnose infection across environments. The additive ...

  13. The genotype-phenotype map of an evolving digital organism.

    Directory of Open Access Journals (Sweden)

    Miguel A Fortuna


    Full Text Available To understand how evolving systems bring forth novel and useful phenotypes, it is essential to understand the relationship between genotypic and phenotypic change. Artificial evolving systems can help us understand whether the genotype-phenotype maps of natural evolving systems are highly unusual, and it may help create evolvable artificial systems. Here we characterize the genotype-phenotype map of digital organisms in Avida, a platform for digital evolution. We consider digital organisms from a vast space of 10141 genotypes (instruction sequences, which can form 512 different phenotypes. These phenotypes are distinguished by different Boolean logic functions they can compute, as well as by the complexity of these functions. We observe several properties with parallels in natural systems, such as connected genotype networks and asymmetric phenotypic transitions. The likely common cause is robustness to genotypic change. We describe an intriguing tension between phenotypic complexity and evolvability that may have implications for biological evolution. On the one hand, genotypic change is more likely to yield novel phenotypes in more complex organisms. On the other hand, the total number of novel phenotypes reachable through genotypic change is highest for organisms with simple phenotypes. Artificial evolving systems can help us study aspects of biological evolvability that are not accessible in vastly more complex natural systems. They can also help identify properties, such as robustness, that are required for both human-designed artificial systems and synthetic biological systems to be evolvable.

  14. The genotype-phenotype map of an evolving digital organism. (United States)

    Fortuna, Miguel A; Zaman, Luis; Ofria, Charles; Wagner, Andreas


    To understand how evolving systems bring forth novel and useful phenotypes, it is essential to understand the relationship between genotypic and phenotypic change. Artificial evolving systems can help us understand whether the genotype-phenotype maps of natural evolving systems are highly unusual, and it may help create evolvable artificial systems. Here we characterize the genotype-phenotype map of digital organisms in Avida, a platform for digital evolution. We consider digital organisms from a vast space of 10141 genotypes (instruction sequences), which can form 512 different phenotypes. These phenotypes are distinguished by different Boolean logic functions they can compute, as well as by the complexity of these functions. We observe several properties with parallels in natural systems, such as connected genotype networks and asymmetric phenotypic transitions. The likely common cause is robustness to genotypic change. We describe an intriguing tension between phenotypic complexity and evolvability that may have implications for biological evolution. On the one hand, genotypic change is more likely to yield novel phenotypes in more complex organisms. On the other hand, the total number of novel phenotypes reachable through genotypic change is highest for organisms with simple phenotypes. Artificial evolving systems can help us study aspects of biological evolvability that are not accessible in vastly more complex natural systems. They can also help identify properties, such as robustness, that are required for both human-designed artificial systems and synthetic biological systems to be evolvable.

  15. The influence of temperature on photosynthesis of different tomato genotypes

    NARCIS (Netherlands)

    Gosiewski, W.; Nilwik, H.J.M.; Bierhuizen, J.F.


    Net photosynthesis and dark respiration from whole plants of various tomato genotypes were measured in a closed system. At low irradiance (27 W m−2) and low external CO2 concentration (550 mg m−3), net photosynthesis of 10 genotypes was found to vary between 0.122 and 0.209 mg CO2 m−2 s−1.

  16. characterisation of common bean genotypes based on storage

    African Journals Online (AJOL)


    of pliers and then ground to fine powder with a ... segregation of genotypes were Rm 23.75, 32.50,. 33.75, 22.50 ... Figure 1. Positions of Phaseolus vulgarisL. genotypes on the first and second correspondence scores based on storage protein.

  17. Integrated analysis for genotypic adaptation in rice | Das | African ...

    African Journals Online (AJOL)

    Integrated analysis for genotypic adaptation in rice. S Das, RC Misra, MC Pattnaik, SK Sinha. Abstract. Development of varieties with high yield potential coupled with wide adaptability is an important plant breeding objective. The presence of genotype by environment (GxE) interaction plays a crucial role in determining the ...

  18. Characteristics of Streptococcus mutans genotypes and dental caries in children (United States)

    Cheon, Kyounga; Moser, Stephen A.; Wiener, Howard W.; Whiddon, Jennifer; Momeni, Stephanie S.; Ruby, John D.; Cutter, Gary R.; Childers, Noel K.


    This longitudinal cohort study evaluated the diversity, commonality, and stability of Streptococcus mutans genotypes associated with dental caries history. Sixty-seven 5 and 6 yr-old children, considered being at high caries risk, had plaque collected from baseline through 36 months for S. mutans isolation and genotyping with repetitive extragenic palindromic-PCR (4,392 total isolates). Decayed, missing, filled surfaces (dmfs/DMFS) for each child were recorded at baseline. At baseline, 18 distinct genotypes were found among 911 S. mutans isolates from 67 children (diversity) and 13 genotypes were shared by at least 2 children (commonality). The number of genotypes per individual was positively associated with the proportion of decayed surfaces (p-ds) at baseline. Twenty-four of the 39 children who were available at follow-up visits maintained a predominant genotype for the follow-up periods (stability) and was negatively associated with p-ds. The observed diversity, commonality, and stability of S. mutans genotypes represent a pattern of dental caries epidemiology in this high caries risk community, which suggest fewer decayed surfaces are significantly associated with lower diversity and stability of S. mutans genotypes. PMID:23659236

  19. Beijing/W genotype Mycobacterium tuberculosis and drug resistance.

    NARCIS (Netherlands)

    Glynn, Judith R; Kremer, Kristin; Borgdorff, Martien W; Rodriguez, Mar Pujades; Soolingen, Dick van


    Beijing/W genotype Mycobacterium tuberculosis is widespread, may be increasing, and may have a predilection for drug resistance. Individual-level data on >29,000 patients from 49 studies in 35 countries were combined to assess the Beijing genotype's prevalence worldwide, trends over time and with

  20. Apolipoprotein E genotype, cardiovascular biomarkers and risk of stroke

    DEFF Research Database (Denmark)

    Khan, Tauseef A; Shah, Tina; Prieto, David


    At the APOE gene, encoding apolipoprotein E, genotypes of the ε2/ε3/ε4 alleles associated with higher LDL-cholesterol (LDL-C) levels are also associated with higher coronary risk. However, the association of APOE genotype with other cardiovascular biomarkers and risk of ischaemic stroke is less c...

  1. Genotype dependent callus induction and shoot regeneration in ...

    African Journals Online (AJOL)

    This study aims to observe the effect of genotype, hormone and culture conditions on sunflower (Helianthus annuus L.) callus induction and indirect plant regeneration. Calli were obtained from hypocotyl and cotyledon explants of five different sunflower genotypes; Trakya 80, Trakya 129, Trakya 259, Trakya 2098 and ...

  2. Efficiency and response of conilon coffee genotypes to nitrogen supply

    African Journals Online (AJOL)

    The objective of the study was to differentiate genotypes with higher efficiency and responsiveness to nitrogen supply, to understand how the nitrogen supply can impact the dry matter allocation and the accumulation of this nutrient in the different plant compartments of genotypes of conilon coffee, cultivated under ...

  3. Haemoglobin genotype of children with severe malaria seen at the ...

    African Journals Online (AJOL)

    Abstract: Introduction: Types of haemoglobin (Hb) genotype have been found to be crucial to the rate of red blood cell parasite invasion, multiplication, and destruction as well as outcome of malaria disease. In a bid to provide more information on the relationship between Hb genotype and level of protection conferred by ...

  4. participatory selection of mungbean genotypes in uganda abstract

    African Journals Online (AJOL)



    May 29, 2017 ... that there were no significant differences in genotype choices based on gender ... However, there were significant genotype preference differences between eastern and northern regions (χ2 = ..... for southern Ethiopia. ... of improved cowpea cultivars in the Guinea and Sudan savanna zones of north east.

  5. Genetic variation of response to water deficit in parental genotypes ...

    African Journals Online (AJOL)


    In this study, we investigated morphological and photosynthetic responses to water deficit in parental genotypes of M. ... for adaptation to water deficit in legumes is a prerequisite for any research aiming to improve legume yields. ...... tolerant genotypes in rainfed lowland rice. Field Crop. Res. 99:48-58. Rouached A, Slama I, ...

  6. Clusters of incompatible genotypes evolve with limited dispersal (United States)

    Erin L. Landguth; Norman A. Johnson; Samuel A. Cushman


    Theoretical and empirical studies have shown heterogeneous selection to be the primary driver for the evolution of reproductively isolated genotypes in the absence of geographic barriers. Here, we ask whether limited dispersal alone can lead to the evolution of reproductively isolated genotypes despite the absence of any geographic barriers or heterogeneous...

  7. Evaluation of sorghum genotypes under drought stress conditions ...

    African Journals Online (AJOL)

    Seven genotypes of sorghum (Sorghum bicolour (L.) Moench) were studied in both drought and normal conditions. In each condition, the genotypes were evaluated using a split plot based randomized complete block design with three replications. Drought tolerance indices including stability tolerance index (STI), mean ...

  8. Genotyping-By-Sequencing for Plant Genetic Diversity Analysis: A Lab Guide for SNP Genotyping

    Directory of Open Access Journals (Sweden)

    Gregory W. Peterson


    Full Text Available Genotyping-by-sequencing (GBS has recently emerged as a promising genomic approach for exploring plant genetic diversity on a genome-wide scale. However, many uncertainties and challenges remain in the application of GBS, particularly in non-model species. Here, we present a GBS protocol we developed and use for plant genetic diversity analysis. It uses two restriction enzymes to reduce genome complexity, applies Illumina multiplexing indexes for barcoding and has a custom bioinformatics pipeline for genotyping. This genetic diversity-focused GBS (gd-GBS protocol can serve as an easy-to-follow lab guide to assist a researcher through every step of a GBS application with five main components: sample preparation, library assembly, sequencing, SNP calling and diversity analysis. Specifically, in this presentation, we provide a brief overview of the GBS approach, describe the gd-GBS procedures, illustrate it with an application to analyze genetic diversity in 20 flax (Linum usitatissimum L. accessions and discuss related issues in GBS application. Following these lab bench procedures and using the custom bioinformatics pipeline, one could generate genome-wide SNP genotype data for a conventional genetic diversity analysis of a non-model plant species.

  9. Genotypic character relationship and phenotypic path coefficient analysis in chili pepper genotypes grown under tropical condition. (United States)

    Usman, Magaji G; Rafii, Mohd Y; Martini, Mohammad Y; Oladosu, Yusuff; Kashiani, Pedram


    Studies on genotypic and phenotypic correlations among characters of crop plants are useful in planning, evaluating and setting selection criteria for the desired characters in a breeding program. The present study aimed to estimate the phenotypic correlation coefficients among yield and yield attributed characters and to work out the direct and indirect effects of yield-related characters on yield per plant using path coefficient analysis. Twenty-six genotypes of chili pepper were laid out in a randomized complete block design with three replications. Yield per plant showed positive and highly significant (P ≤ 0.01) correlations with most of the characters studied at both the phenotypic and genotypic levels. By contrast, disease incidence and days to flowering showed a significant negative association with yield. Fruit weight and number of fruits exerted positive direct effect on yield and also had a positive and significant (P ≤ 0.01) correlation with yield per plant. However, fruit length showed a low negative direct effect with a strong and positive indirect effect through fruit weight on yield and had a positive and significant association with yield. Longer fruits, heavy fruits and a high number of fruits are variables that are related to higher yields of chili pepper under tropical conditions and hence could be used as a reliable indicator in indirect selection for yield. © 2016 Society of Chemical Industry. © 2016 Society of Chemical Industry.

  10. Genotypic diversity of european Phytophthora ramorum isolates based on SSR analysis (United States)

    Kris Van Poucke; Annelies Vercauteren; Martine Maes; Sabine Werres; Kurt Heungens


    in Scotland were genotyped using seven microsatellite markers as described by Vercauteren et al. (2010). Thirty multilocus genotypes were identified within the Scottish population, with 51 percent of the isolates belonging to the main European genotype EU1MG1 and 13 unique detected genotypes. Ten of those genotypes were site specific, often represented by...

  11. SNPMClust: Bivariate Gaussian Genotype Clustering and Calling for Illumina Microarrays

    Directory of Open Access Journals (Sweden)

    Stephen W. Erickson


    Full Text Available SNPMClust is an R package for genotype clustering and calling with Illumina microarrays. It was originally developed for studies using the GoldenGate custom genotyping platform but can be used with other Illumina platforms, including Infinium BeadChip. The algorithm first rescales the fluorescent signal intensity data, adds empirically derived pseudo-data to minor allele genotype clusters, then uses the package mclust for bivariate Gaussian model fitting. We compared the accuracy and sensitivity of SNPMClust to that of GenCall, Illumina's proprietary algorithm, on a data set of 94 whole-genome amplified buccal (cheek swab DNA samples. These samples were genotyped on a custom panel which included 1064 SNPs for which the true genotype was known with high confidence. SNPMClust produced uniformly lower false call rates over a wide range of overall call rates.

  12. Micropropagation of six Paulownia genotypes through tissue culture

    Directory of Open Access Journals (Sweden)

    Lydia Shtereva


    Full Text Available We investigated the effect of genotype and culture medium on the in vitro germination and development of plantlets from seeds of 6 different Paulownia genotypes (P. tomentosa, hybrid lines P. tomentosa P. fortunei (Mega, Ganter and Caroline, P. elongata and hybrid line P. elongata P. fortunei. Nodal and shoot tip explants were used for micropropagation of Paulownia genotypes by manipulating plant growth regulators. The highest germination percentage for all genotypes was obtained for seeds inoculated on medium supplemented with 50 mg*L GA3 (MSG2. On Thidiazuron containing media, the explants of hybrid line P. elongata P. fortunei exhibited the highest frequency of axillary shoot proliferation following by P. tomentosa P. fortunei. The results are discussed with the perspective of applying an improved protocol for in vitro seed germination and plantlet formation in several economically valuable Paulownia genotypes.

  13. Genetic and other factors determining mannose-binding lectin levels in American Indians: the Strong Heart Study

    DEFF Research Database (Denmark)

    Best, Lyle G; Ferrell, Robert E; Decroo, Susan


    control of MBL2 expression is complex and genetic background effects in specific populations are largely unknown. METHODS: The Strong Heart Study is a longitudinal, cohort study of cardiovascular disease among American Indians. A subset of individuals genotyped for the above mentioned case-control study...... in Caucasian and other populations, result in markedly reduced expression of functional protein. Prospective epidemiologic studies, including a nested, case-control study from the present population, have demonstrated the ability of MBL2 genotypes to predict complications of atherosclerosis,. The genetic...

  14. The phenotype, psychotype and genotype of bruxism (United States)

    Cruz-Fierro, Norma; Martínez-Fierro, Margarita; Cerda-Flores, Ricardo M.; Gómez-Govea, Mayra A.; Delgado-Enciso, Iván; Martínez-De-Villarreal, Laura E.; González-Ramírez, Mónica T.; Rodríguez-Sánchez, Irám Pablo


    Bruxism is a jaw muscle activity that involves physio-pathological, psycho-social, hereditary and genetic factors. The purpose of this study was to determine the associations between self-reported bruxism, anxiety, and neuroticism personality trait with the rs6313 polymorphism in the gene HTR2A. A sample of 171 subjects of both sexes (14–53 years of age) was included. The control group (group 1, n=60) exhibited no signs or symptoms of bruxism. The case group had signs and symptoms of bruxism (n=112) and was subdivided into group 2, bruxism during sleep (n=22); group 3, awake bruxism (n=44); and group 4 combined bruxism (n=46). As diagnostic tools, the Self-Reported Bruxism Questionnaire (SBQ), the Beck Anxiety Inventory (BAI) and the Eysenck Personality Questionnaire Revised-Abbreviated (EPQR-A) were used. HTR2A (rs6313) SNPs were determined by qPCR for all the participants. The packages SPSS, maxLik and EPI-INFO were used for data analysis. The combined bruxism group reported higher scores in bruxism symptoms, mean = 32.21; anxiety symptoms, mean = 14.80; and neuroticism, mean = 3.26. Combined bruxism was associated with a higher degree of neuroticism (OR=15.0; CI 1.52–148.32) and anxiety in grade 3-moderate (OR=3.56; CI 1.27–10.03), and grade 4-severe (OR=8.40; CI 1.45–48.61), as determined using EPISODE computer software. Genotypic homogeneity analysis revealed no significant differences in allele frequency (P=0.612) among the four groups. The population was in Hardy-Weinberg equilibrium (maxLik package). In conclusion, the three instruments confirm traits of bruxism, anxiety and neuroticism in individuals with bruxism. These data were ratified when the sample was divided by genotypic homogeneity. On the other hand, there was no significant difference between the groups in the SNPs rs6313 from the HTR2A gene. PMID:29599979

  15. Rotavirus genotype shifts among Swedish children and adults-Application of a real-time PCR genotyping. (United States)

    Andersson, Maria; Lindh, Magnus


    It is well known that human rotavirus group A is the most important cause of severe diarrhoea in infants and young children. Less is known about rotavirus infections in other age groups, and about how rotavirus genotypes change over time in different age groups. Develop a real-time PCR to easily genotype rotavirus strains in order to monitor the pattern of circulating genotypes. In this study, rotavirus strains in clinical samples from children and adults in Western Sweden during 2010-2014 were retrospectively genotyped by using specific amplification of VP 4 and VP 7 genes with a new developed real-rime PCR. A genotype was identified in 97% of 775 rotavirus strains. G1P[8] was the most common genotype representing 34.9%, followed by G2P[4] (28.3%), G9P[8] (11.5%), G3P[8] (8.1%), and G4P[8] (7.9%) The genotype distribution changed over time, from predominance of G1P[8] in 2010-2012 to predominance of G2P[4] in 2013-2014. There were also age-related differences, with G1P[8] being the most common genotype in children under 2 years (47.6%), and G2P[4] the most common in those over 70 years of age (46.1%.). The shift to G2P[4] in 2013-2014 was associated with a change in the age distribution, with a greater number of rotavirus positive cases in elderly than in children. By using a new real-time PCR method for genotyping we found that genotype distribution was age related and changed over time with a decreasing proportion of G1P[8]. Copyright © 2017. Published by Elsevier B.V.

  16. Genotyping of vacA alleles of Helicobacter pylori strains recovered ...

    African Journals Online (AJOL)

    commonly detected genotypes in the meat-based foods, viz, vegetable sandwich and ready to eat fish, were vacA ... Keywords: Helicobacter pylori, VacA genotypes, Genotyping, Food items ..... Microbiology and Quality Control, Islamic Azad.

  17. A SNP Genotyping Array for Hexaploid Oat

    Directory of Open Access Journals (Sweden)

    Nicholas A. Tinker


    Full Text Available Recognizing a need in cultivated hexaploid oat ( L. for a reliable set of reference single nucleotide polymorphisms (SNPs, we have developed a 6000 (6K BeadChip design containing 257 Infinium I and 5486 Infinium II designs corresponding to 5743 SNPs. Of those, 4975 SNPs yielded successful assays after array manufacturing. These SNPs were discovered based on a variety of bioinformatics pipelines in complementary DNA (cDNA and genomic DNA originating from 20 or more diverse oat cultivars. The array was validated in 1100 samples from six recombinant inbred line (RIL mapping populations and sets of diverse oat cultivars and breeding lines, and provided approximately 3500 discernible Mendelian polymorphisms. Here, we present an annotation of these SNPs, including methods of discovery, gene identification and orthology, population-genetic characteristics, and tentative positions on an oat consensus map. We also evaluate a new cluster-based method of calling SNPs. The SNP design sequences are made publicly available, and the full SNP genotyping platform is available for commercial purchase from an independent third party.

  18. Genotyping of Canine parvovirus in western Mexico. (United States)

    Pedroza-Roldán, César; Páez-Magallan, Varinia; Charles-Niño, Claudia; Elizondo-Quiroga, Darwin; De Cervantes-Mireles, Raúl Leonel; López-Amezcua, Mario Alberto


    Canine parvovirus (CPV) is one of the most common infectious agents related to high morbidity rates in dogs. In addition, the virus is associated with severe gastroenteritis, diarrhea, and vomiting, resulting in high death rates, especially in puppies and nonvaccinated dogs. To date, there are 3 variants of the virus (CPV-2a, CPV-2b, and CPV-2c) circulating worldwide. In Mexico, reports describing the viral variants circulating in dog populations are lacking. In response to this deficiency, a total of 41 fecal samples of suspected dogs were collected from October 2013 through April 2014 in the Veterinary Hospital of the University of Guadalajara in western Mexico. From these, 24 samples resulted positive by polymerase chain reaction, and the viral variant was determined by restriction fragment length polymorphism. Five positive diagnosed samples were selected for partial sequencing of the vp2 gene and codon analysis. The results demonstrated that the current dominant viral variant in Mexico is CPV-2c. The current study describes the genotyping of CPV strains, providing valuable evidence of the dominant frequency of this virus in a dog population from western Mexico. © 2014 The Author(s).

  19. Antixenosis of bean genotypes to Chrysodeixis includens (Lepidoptera: Noctuidae

    Directory of Open Access Journals (Sweden)

    Rafaela Morando


    Full Text Available The objective of this work was to evaluate bean genotypes for resistance to soybean looper (Chrysodeixis includens. Initially, free-choice tests were carried out with 59 genotypes, divided into three groups according to leaf color intensity (dark green, light green, and medium green, in order to evaluate oviposition preference. Subsequently, 12 genotypes with high potential for resistance were selected, as well as two susceptible commercial standards. With these genotypes, new tests were performed for oviposition in a greenhouse, besides tests for attractiveness and consumption under laboratory conditions (26±2ºC, 65±10% RH, and 14 h light: 10 h dark photophase. In the no-choice test with adults, in the greenhouse, the 'IAC Jabola', Arcelina 1, 'IAC Boreal', 'Flor de Mayo', and 'IAC Formoso' genotypes were the least oviposited, showing antixenosis-type resistance for oviposition. In the free-choice test with larvae, Arcelina 4, 'BRS Horizonte', 'Pérola', H96A102-1-1-1-52, 'IAC Boreal', 'IAC Harmonia', and 'IAC Formoso' were the less consumed genotypes, which indicates antixenosis to feeding. In the no-choice test, all genotypes (except for 'IAPAR 57' expressed moderate levels of antixenosis to feeding against C. includens larvae.

  20. Porphyromonas gingivalis Fim-A genotype distribution among Colombians (United States)

    Jaramillo, Adriana; Parra, Beatriz; Botero, Javier Enrique; Contreras, Adolfo


    Introduction: Porphyromonas gingivalis is associated with periodontitis and exhibit a wide array of virulence factors, including fimbriae which is encoded by the FimA gene representing six known genotypes. Objetive: To identify FimA genotypes of P. gingivalis in subjects from Cali-Colombia, including the co-infection with Aggregatibacter actinomycetemcomitans, Treponema denticola, and Tannerella forsythia. Methods: Subgingival samples were collected from 151 people exhibiting diverse periodontal condition. The occurrence of P. gingivalis, FimA genotypes and other bacteria was determined by PCR. Results: P. gingivalis was positive in 85 patients. Genotype FimA II was more prevalent without reach significant differences among study groups (54.3%), FimA IV was also prevalent in gingivitis (13.0%). A high correlation (p= 0.000) was found among P. gingivalis, T. denticola, and T. forsythia co-infection. The FimA II genotype correlated with concomitant detection of T. denticola and T. forsythia. Conclusions: Porphyromonas gingivalis was high even in the healthy group at the study population. A trend toward a greater frequency of FimA II genotype in patients with moderate and severe periodontitis was determined. The FimA II genotype was also associated with increased pocket depth, greater loss of attachment level, and patients co-infected with T. denticola and T. forsythia. PMID:26600627

  1. Assessing accuracy of genotype imputation in American Indians.

    Directory of Open Access Journals (Sweden)

    Alka Malhotra

    Full Text Available Genotype imputation is commonly used in genetic association studies to test untyped variants using information on linkage disequilibrium (LD with typed markers. Imputing genotypes requires a suitable reference population in which the LD pattern is known, most often one selected from HapMap. However, some populations, such as American Indians, are not represented in HapMap. In the present study, we assessed accuracy of imputation using HapMap reference populations in a genome-wide association study in Pima Indians.Data from six randomly selected chromosomes were used. Genotypes in the study population were masked (either 1% or 20% of SNPs available for a given chromosome. The masked genotypes were then imputed using the software Markov Chain Haplotyping Algorithm. Using four HapMap reference populations, average genotype error rates ranged from 7.86% for Mexican Americans to 22.30% for Yoruba. In contrast, use of the original Pima Indian data as a reference resulted in an average error rate of 1.73%.Our results suggest that the use of HapMap reference populations results in substantial inaccuracy in the imputation of genotypes in American Indians. A possible solution would be to densely genotype or sequence a reference American Indian population.

  2. Genetic similarity of soybean genotypes revealed by seed protein

    Directory of Open Access Journals (Sweden)

    Nikolić Ana


    Full Text Available More accurate and complete descriptions of genotypes could help determinate future breeding strategies and facilitate introgression of new genotypes in current soybean genetic pool. The objective of this study was to characterize 20 soybean genotypes from the Maize Research Institute "Zemun Polje" collection, which have good agronomic performances, high yield, lodging and drought resistance, and low shuttering by seed proteins as biochemical markers. Seed proteins were isolated and separated by PAA electrophoresis. On the basis of the presence/absence of protein fractions coefficients of similarity were calculated as Dice and Roger and Tanamoto coefficient between pairs of genotypes. The similarity matrix was submitted for hierarchical cluster analysis of un weighted pair group using arithmetic average (UPGMA method and necessary computation were performed using NTSYS-pc program. Protein seed analysis confirmed low level of genetic diversity in soybean. The highest genetic similarity was between genotypes P9272 and Kador. According to obtained results, soybean genotypes were assigned in two larger groups and coefficients of similarity showed similar results. Because of the lack of pedigree data for analyzed genotypes, correspondence with marker data could not be determined. In plant with a narrow genetic base in their gene pool, such as soybean, protein markers may not be sufficient for characterization and study of genetic diversity.

  3. MMP-8 genotypes influence the inflammatory response in human endotoxemia. (United States)

    Rella, Judith M; Jilma, Bernd; Fabry, Astrid; Kaynar, A Murat; Mayr, Florian B


    Clinical studies have reported associations between MMP-8 genotypes and clinical outcomes without exploring underlying mechanisms. This study aims to understand the influence of the rs1940475 SNP on downstream chemokine and cytokine response in human endotoxemia. Rs1940475 was genotyped in 44 healthy Caucasian males, who were challenged with an intravenous bolus of 2 ng/kg lipopolysaccharide (LPS). Plasma levels of tumor necrosis factor (TNF), interleukin (IL)-6, IL-8, and macrophage inflammatory protein (MIP)-1α were measured at baseline and 2, 4, 6, and 24 h after LPS infusion with high-sensitivity enzyme immunoassays. Peak TNF levels at 2 h after LPS infusion were significantly higher in subjects with AA genotype compared to subjects with AG or GG genotypes (185 pg/mL [IQR, 154-234] vs. 94 pg/mL [IQR, 65-125] vs. 107 pg/mL [IQR, 80-241], respectively; p = 0.03 between groups). Peak IL-6 levels were trend-wise higher in subjects with AA genotype compared to those with AG or GG genotypes (566 pg/mL [IQR, 294-644] vs. 278 pg/mL [IQR, 184-539] and 329 pg/mL [IQR, 240-492], respectively; p = 0.15 between groups). In contrast, peak MIP-1α at 2 h was highest in GG genotype carriers compared to those with AG or AA genotypes (602 pg/mL [IQR, 449-727] vs. 389 pg/mL [IQR, 375-490] and 510 pg/mL [425-813], respectively; p < 0.03 between groups). AA genotype carriers had highest peak TNF and IL-6 levels after LPS challenge, whereas peak MIP-1α levels were highest in GG carriers. This indicates that the rs1940475 SNP modifies the host response to inflammatory stimuli, which may in part explain previously shown associations with clinical outcomes.

  4. Genotype by sex and genotype by age interactions with sedentary behavior: the Portuguese Healthy Family Study.

    Directory of Open Access Journals (Sweden)

    Daniel M V Santos

    Full Text Available Sedentary behavior (SB expression and its underlying causal factors have been progressively studied, as it is a major determinant of decreased health quality. In the present study we applied Genotype x Age (GxAge and Genotype x Sex (GxSex interaction methods to determine if the phenotypic expression of different SB traits is influenced by an interaction between genetic architecture and both age and sex. A total of 1345 subjects, comprising 249 fathers, 327 mothers, 334 sons and 325 daughters, from 339 families of The Portuguese Healthy Family Study were included in the analysis. SB traits were assessed by means of a 3-d physical activity recall, the Baecke and IPAQ questionnaires. GxAge and GxSex interactions were analyzed using SOLAR 4.0 software. Sedentary behaviour heritability estimates were not always statistically significant (p>0.05 and ranged from 3% to 27%. The GxSex and GxAge interaction models were significantly better than the single polygenic models for TV (min/day, EEsed (kcal/day, personal computer (PC usage and physical activty (PA tertiles. The GxAge model is also significantly better than the polygenic model for Sed (min/day. For EEsed, PA tertiles, PC and Sed, the GxAge interaction was significant because the genetic correlation between SB environments was significantly different from 1. Further, PC and Sed variance heterogeneity among distinct ages were observed. The GxSex interaction was significant for EEsed due to genetic variance heterogeneity between genders and for PC due to a genetic correlation less than 1 across both sexes. Our results suggest that SB expression may be influenced by the interactions between genotype with both sex and age. Further, different sedentary behaviors seem to have distinct genetic architectures and are differentially affected by age and sex.

  5. Evaluation of Soybean and Cowpea Genotypes for Phosphorus Use Efficiency

    Energy Technology Data Exchange (ETDEWEB)

    Kumaga, F. K.; Ofori, K.; Adiku, S. K.; Kugblenu, Y. O.; Asante, W.; Seidu, H. [College of Agriculture and Consumer Sciences, University of Ghana, Legon, Accra (Ghana); Adu-Gyamfi, J. J. [Soil and Water Management and Crop Nutrition Laboratory, International Atomic Energy Agency, Vienna (Austria)


    Initial screening of one hundred and fifty-two (152) and fifty (50) genotypes of soybean and cowpea, respectively, were conducted at the early growth stage to evaluate root traits associated with phosphorus (P) efficiency. Fifty soybean genotypes were subsequently selected and evaluated on a tropical low P soil (Lixisol) for growth and yield under low and adequate P availability. Plants were sampled at twelve and thirty days after sowing and at maturity. Six cowpea genotypes were also selected and evaluated in pots filled with Alfisol under low, moderate and high P availability. Plants were sampled at forty days and assessed for shoot yield and nodulation under low P availability. Using Principal Component Analysis (PCA), Phosphorus Efficiency Index (PEI) was used to determine P efficiency of soybean and cowpea genotypes. A wide variation in root traits for soybean and cowpea at the early growth stage was found, and allometric analysis showed a significant correlation between the root and shoot parameters at this stage. The study provided an opportunity to compare root traits of newly developed cowpea genotypes (early maturing, medium maturing, dual purpose and Striga resistant lines) with older released cultivars. There were significant differences in root length among the groups. In general, dual purpose, Striga resistant and medium/early maturing genotypes showed the longest roots while the older varieties showed the least total root length. Field and pot results also showed differential growth of soybean and cowpea with low P availability. Further, PCA of the results indicated that soybean genotypes could be grouped into three distinct P efficiency categories. Retaining the PC and the relative weight for each genotype in combination with yield potential under high P, four categories of responsiveness to P were obtained. Cowpea genotypes were grouped into three P efficiency categories and two categories of responsiveness to P. The study also found genetic

  6. Genotyping-by-sequencing data of 272 crested wheatgrass (Agropyron cristatum genotypes

    Directory of Open Access Journals (Sweden)

    Pingchuan Li


    Full Text Available Crested wheatgrass [Agropyron cristatum L. (Gaertn.] is an important cool-season forage grass widely used for early spring grazing. However, the genomic resources for this non-model plant are still lacking. Our goal was to generate the first set of next generation sequencing data using the genotyping-by-sequencing technique. A total of 272 crested wheatgrass plants representing seven breeding lines, five cultivars and five geographically diverse accessions were sequenced with an Illumina MiSeq instrument. These sequence datasets were processed using different bioinformatics tools to generate contigs for diploid and tetraploid plants and SNPs for diploid plants. Together, these genomic resources form a fundamental basis for genomic studies of crested wheatgrass and other wheatgrass species. The raw reads were deposited into Sequence Read Archive (SRA database under NCBI accession SRP115373 ( and the supplementary datasets are accessible in Figshare (10.6084/m9.figshare.5345092. Keywords: Crested wheatgrass, Genotyping-by-sequencing, Diploid, Tetraploid, Raw sequence data

  7. Hepatitis E Virus Genotype 3 in Sewage and Genotype 1 in Acute Hepatitis Cases, Israel (United States)

    Ram, Daniela; Manor, Yossi; Gozlan, Yael; Schwartz, Eli; Ben-Ari, Ziv; Mendelson, Ella; Mor, Orna


    Hepatitis E virus (HEV) is an emerging infectious agent in developed countries. HEV genotypes 1 (G1) and 3 (G3) have been identified in environmental and clinical samples in Europe. In Israel, the overall prevalence of anti-HEV IgG antibodies was found to be 10.6%; however, reports of HEV infection are scarce. In this study, the presence of HEV in Israel was investigated using 169 sewage samples from 32 treatment facilities and 49 samples from acute hepatitis patients, all collected between 2013 and 2015. Fourteen sewage samples, from Haifa (11/18 samples), Tel Aviv (2/29 samples), and Beer Sheva (1/17 samples), regions with good sanitary conditions and middle-high socioeconomic populations, were HEV positive. Among the patient samples, 6.1% (3/49) were HEV positive, all returning travelers from India. Genotype analysis revealed G1 HEV in patients and G3 HEV sequences in sewage. Evidence that HEV could be establishing itself in our region may justify more active surveillance to monitor its spread. PMID:27246446

  8. Connecting functional and statistical definitions of genotype by genotype interactions in coevolutionary studies

    Directory of Open Access Journals (Sweden)

    Katy Denise Heath


    Full Text Available Predicting how species interactions evolve requires that we understand the mechanistic basis of coevolution, and thus the functional genotype-by-genotype interactions (G × G that drive reciprocal natural selection. Theory on host-parasite coevolution provides testable hypotheses for empiricists, but depends upon models of functional G × G that remain loosely tethered to the molecular details of any particular system. In practice, reciprocal cross-infection studies are often used to partition the variation in infection or fitness in a population that is attributable to G × G (statistical G × G. Here we use simulations to demonstrate that within-population statistical G × G likely tells us little about the existence of coevolution, its strength, or the genetic basis of functional G × G. Combined with studies of multiple populations or points in time, mapping and molecular techniques can bridge the gap between natural variation and mechanistic models of coevolution, while model-based statistics can formally confront coevolutionary models with cross-infection data. Together these approaches provide a robust framework for inferring the infection genetics underlying statistical G × G, helping unravel the genetic basis of coevolution.

  9. Analysis of the genetic diversity of four rabbit genotypes using ...

    African Journals Online (AJOL)



    May 15, 2013 ... consumption and low cost, it has been widely utilized in genetics analysis in ... isozyme variation among the selected individuals within each rabbit genotype. ... with different embryo survival (Bolet and Theau-Clement, 1994).

  10. Genotype x environment interaction and stability analysis for yield ...

    African Journals Online (AJOL)



    . Combined analysis of variance (ANOVA) for yield and yield components revealed highly significant .... yield stability among varieties, multi-location trials with ... Mean grain yield (kg/ha) of 17 Kabuli-type chickpea genotypes ...

  11. Sofosbuvir based treatment of chronic hepatitis C genotype 3 infections

    DEFF Research Database (Denmark)

    Dalgard, Olav; Weiland, Ola; Noraberg, Geir


    BACKGROUND AND AIMS: Chronic hepatitis C virus (HCV) genotype 3 infection with advanced liver disease has emerged as the most challenging to treat. We retrospectively assessed the treatment outcome of sofosbuvir (SOF) based regimes for treatment of HCV genotype 3 infections in a real life setting...... in Scandinavia. METHODS: Consecutive patients with chronic HCV genotype 3 infection were enrolled at 16 treatment centers in Denmark, Sweden, Norway and Finland. Patients who had received a SOF containing regimen were included. The fibrosis stage was evaluated by liver biopsy or transient liver elastography...... was similar for all treatment regimens, but lower in men (p = 0.042), and in patients with decompensated liver disease (p = 0.004). CONCLUSION: We found that sofosbuvir based treatment in a real-life setting could offer SVR rates exceeding 90% in patients with HCV genotype 3 infection and advanced liver...

  12. Evaluation of 14 winter bread wheat genotypes in normal irrigation ...

    African Journals Online (AJOL)

    Evaluation of 14 winter bread wheat genotypes in normal irrigation and stress conditions after anthesis stage. ... African Journal of Biotechnology ... Using biplot graphic method, comparison of indices amounts and mean rating of indices for ...

  13. adaptation of introduced mungbean genotypes in uganda abstract

    African Journals Online (AJOL)


    locations in Uganda, to determine the adaptability of introduced mungbean genotypes, and identify ... The six test multi-locations were grouped into two candidate mega-environments for ..... interactions: Challenges and opportunities for.

  14. cyanide cassava genotypes in acid ultisols of south eastern Nigeria

    African Journals Online (AJOL)

    ENGR C.J


    Jan 29, 2014 ... Thirty-eight high and low cyanide cassava genotypes were evaluated for growth and .... sium (K) and sodium (Na) were determined by Flamephoto-metory .... outlined for randomized complete block design (Steel et al., 1997).

  15. Molecular methods for bacterial genotyping and analyzed gene regions

    Directory of Open Access Journals (Sweden)

    İbrahim Halil Yıldırım1, Seval Cing Yıldırım2, Nadir Koçak3


    Full Text Available Bacterial strain typing is an important process for diagnosis, treatment and epidemiological investigations. Current bacterial strain typing methods may be classified into two main categories: phenotyping and genotyping. Phenotypic characters are the reflection of genetic contents. Genotyping, which refers discrimination of bacterial strains based on their genetic content, has recently become widely used for bacterial strain typing. The methods already used in genotypingof bacteria are quite different from each other. In this review we tried to summarize the basic principles of DNA-based methods used in genotyping of bacteria and describe some important DNA regions that are used in genotyping of bacteria. J Microbiol Infect Dis 2011;1(1:42-46.

  16. Effects of nutritional supplementation and genotype on milk ...

    African Journals Online (AJOL)

    Effects of nutritional supplementation and genotype on milk production and fertility of lactating dairy ... Bulletin of Animal Health and Production in Africa ... The objective of this study was to determine effects of nutrition on milk production and ...

  17. Effects of genotype x bradyrhizobium inoculation or x fertilizer n ...

    African Journals Online (AJOL)

    Genotype x inoculation interaction was significant only for protein and oil content in one year. .... main-plot factor. ... components and expected genetic gains invoiving yield srrnin. ... Combined analysis of the cu ltivar experiment was carried.

  18. Characterization of cowpea genotype resistance to Callosobruchus maculatus

    Directory of Open Access Journals (Sweden)

    Maria de Jesus Passos de Castro


    Full Text Available The objective of this work was to characterize the resistance of 50 cowpea (Vigna unguiculata genotypes to Callosobruchus maculatus. A completely randomized design with five replicates per treatment (genotype was used. No-choice tests were performed using the 50 cowpea genotypes to evaluate the preference for oviposition and the development of the weevil. The genotypes IT85 F-2687, MN05-841 B-49, MNC99-508-1, MNC99-510-8, TVu 1593, Canapuzinho-1-2, and Sanzi Sambili show non-preference-type resistance (oviposition and feeding. IT81 D-1045 Ereto and IT81 D-1045 Enramador exhibit antibiosis against C. maculatus and descend from resistant genitors, which grants them potential to be used in future crossings to obtain cowpea varieties with higher levels of resistance.

  19. Multiple centroid method to evaluate the adaptability of alfalfa genotypes

    Directory of Open Access Journals (Sweden)

    Moysés Nascimento


    Full Text Available This study aimed to evaluate the efficiency of multiple centroids to study the adaptability of alfalfa genotypes (Medicago sativa L.. In this method, the genotypes are compared with ideotypes defined by the bissegmented regression model, according to the researcher's interest. Thus, genotype classification is carried out as determined by the objective of the researcher and the proposed recommendation strategy. Despite the great potential of the method, it needs to be evaluated under the biological context (with real data. In this context, we used data on the evaluation of dry matter production of 92 alfalfa cultivars, with 20 cuttings, from an experiment in randomized blocks with two repetitions carried out from November 2004 to June 2006. The multiple centroid method proved efficient for classifying alfalfa genotypes. Moreover, it showed no unambiguous indications and provided that ideotypes were defined according to the researcher's interest, facilitating data interpretation.

  20. A preliminary investigation into genotype x environment interaction ...

    African Journals Online (AJOL)



    Aug 24, 2014 ... Genotype x environment interaction (G x E) in dairy cattle is a contentious ... environments, if it exists, with a negative impact on genetic response ..... interaction for Holstein milk yield in Colombia, Mexico and Puerto Rico.

  1. Giardia and Cryptosporidium species and genotypes in coyotes (Canis latrans). (United States)

    Trout, James M; Santín, Mónica; Fayer, Ronald


    Feces and duodenal scrapings were collected from 22 coyotes (Canis latrans) killed in managed hunts in northeastern Pennsylvania. Polymerase chain reaction (PCR) methods were used to detect Giardia and Cryptosporidium spp. PCR-amplified fragments of Giardia and Cryptosporidium spp. SSU-rRNA genes were subjected to DNA sequence analysis for species/genotype determination. Seven coyotes (32%) were positive for G. duodenalis: three assemblage C, three assemblage D, and one assemblage B. Six coyotes (27%) were positive for Cryptosporidium spp. One isolate shared 99.7% homology with C. muris, whereas five others (23%) shared 100% homology with C. canis, coyote genotype. This is the first report on multiple genotypes of Giardia spp. in coyotes and on the prevalence of Cryptosporidium spp. genotypes in coyotes.

  2. Large SNP arrays for genotyping in crop plants

    Indian Academy of Sciences (India)


    Oct 15, 2012 ... in human has been paralleled by the simultaneous develop- ment of ... In crop plants, the development of large genotyping arrays started much ..... via deep resequencing of reduced representation libraries with the Illumina ...

  3. Efficiency and response of conilon coffee genotypes to nitrogen supply

    African Journals Online (AJOL)



    Aug 31, 2016 ... tolerance to the deficit of these nutrients in the soil. (Colodetti et al., 2014; ... be passive of exploration using genotypes of rapid growth and low nutritional ... amino acids, proteins, nucleotides, hormones and chlorophyll ...

  4. Pollen diversity, viability and floral structure of some Musa genotypes

    African Journals Online (AJOL)

    Prof. Ogunji

    Pollen diversity, viability and floral structure of some Musa genotypes ... at the Faculty of Agriculture & Natural Resources Management farm, Ebonyi State University,. Abakaliki. ..... Roots, tuber, plantains and bananas in human nutrition. Rome,.

  5. High-throughput mouse genotyping using robotics automation. (United States)

    Linask, Kaari L; Lo, Cecilia W


    The use of mouse models is rapidly expanding in biomedical research. This has dictated the need for the rapid genotyping of mutant mouse colonies for more efficient utilization of animal holding space. We have established a high-throughput protocol for mouse genotyping using two robotics workstations: a liquid-handling robot to assemble PCR and a microfluidics electrophoresis robot for PCR product analysis. This dual-robotics setup incurs lower start-up costs than a fully automated system while still minimizing human intervention. Essential to this automation scheme is the construction of a database containing customized scripts for programming the robotics workstations. Using these scripts and the robotics systems, multiple combinations of genotyping reactions can be assembled simultaneously, allowing even complex genotyping data to be generated rapidly with consistency and accuracy. A detailed protocol, database, scripts, and additional background information are available at

  6. Genotype x environment interaction and stability analysis for yield ...

    African Journals Online (AJOL)



    May 6, 2015 ... 4Ethiopian Institute of Agriculture Research, Debre Zeit Agriculture Research Center, Ethiopia. Received .... interaction on seed yield of Kabuli -chickpea genotypes .... becomes important for the chickpea breeders in terms of.

  7. Assessment of genotype x environment interaction on yield and ...

    African Journals Online (AJOL)



    Apr 11, 2011 ... yield and yield components of durum wheat genotypes ... The results of combined analysis of variance showed a strong influence of the ... Stability is defined as the early prediction of environmental im- ... Many resear-.

  8. Genetic diversity of maize genotypes on the basis of morpho ...

    African Journals Online (AJOL)

    Genetic diversity of maize genotypes on the basis of morpho-physiological and simple sequence repeat (SSR) markers. Ashish Kumar, Arunita Rakshit, Naresh K Mangilipelli, Y Varalaxmi, T Vijayalakshmi, Jainender M Vanaja, SK Yadav, B Venkateswarlu, M Maheswari ...

  9. The Comparison of Growth, Slaughter and Carcass Traits of Meat Chicken Genotype Produced by Back-Crossing with A Commercial Broiler Genotype

    Directory of Open Access Journals (Sweden)

    Musa Sarıca


    Full Text Available This study was conducted to determine the growth and some slaughter traits between commercial fast growing chickens and three-way cross M2 genotypes. 260 male female mixed chickens from each genotype was reared 10 replicate per genotype in the same house. Two different slaughtering ages were applied to commercial chickens and slaughtered at 6 and 7 weeks of age for comparing with cross genotypes. F chickens reached to slaughtering age at 42 days, whereas cross groups reached at 49 days. Genotypes consumed same amount of feed until slaughtering ages, but F genotype had better feed conversion ratio. The differences between dressing percentage and carcass parts ratios of genotypes were found significant, and F genotype had higher dressing percentage. Carcass parts of all genotypes were found in acceptable limits.


    Directory of Open Access Journals (Sweden)

    Heni Safitri


    Full Text Available Salinity is one of the most serious problems in rice cultivation. Salinity drastically reduced plant growth and yield, especially at seedling stage. Several rice genotypes have been produced, but their tolerance to salinity has not yet been evaluated. The study aimed to evaluate salinity tolerance of rice genotypes at seedling stage. The glasshouse experiment was conducted at Cimanggu Experimental Station, Bogor, from April to May 2013. Thirteen rice genotypes and two check varieties, namely Pokkali (salt tolerant and IR29 (salt sensitive were tested at seedling stage. The experiment was arranged in a randomized complete block design with three replications and two factors, namely the levels of NaCl (0 and 120 mM and 13 genotypes of rice. Rice seedlings were grown in the nutrient culture (hydroponic supplemented with NaCl at different levels. The growth and salinity injury levels of the genotypes were recorded periodically. The results showed that salinity level of 120 mM NaCl reduced seedling growth of all rice genotypes, but the tolerant ones were survived after 14 days or until the sensitive check variety died. Based on the visual injury symptoms on the leaves, five genotypes, i.e. Dendang, Inpara 5, Inpari 29, IR77674-3B-8-2-2-14-4-AJY2, and IR81493-BBB-6-B- 2-1-2 were tolerant to 120 mM salinity level, while Inpara 4 was comparable to salt sensitive IR29. Hence, Inpara 4 could be used as a salinity sensitive genotype for future research of testing tolerant variety. Further evaluation is needed to confirm their salinity tolerance under field conditions. 

  11. Antioxidant Defense Mechanisms of Salinity Tolerance in Rice Genotypes

    Directory of Open Access Journals (Sweden)

    Mohammad Golam Kibria


    Full Text Available In order to elucidate the role of antioxidant responses in salinity tolerance in rice genotypes under salt stress, experiments were conducted using four rice varieties, including salt-sensitive BRRI dhan 28 and three salt-tolerant varieties BRRI dhan 47, BINA dhan 8 and BINA dhan 10. Thirty-day-old rice seedlings were transplanted into pots. At the active tillering stage (35 d after transplanting, plants were exposed to different salinity levels (0, 20, 40 and 60 mmol/L NaCl. Salt stress caused a significant reduction in growth for all the rice genotypes. Growth reduction was higher in the salt-sensitive genotype than in the salt-tolerant ones, and BINA dhan 10 showed higher salt tolerance in all measured physiological parameters. The reduction in shoot and root biomass was found to be minimal in BINA dhan 10. Chlorophyll content significantly decreased under salt stress except for BINA dhan 10. Proline content significantly increased in salt-tolerant rice genotypes with increased salt concentration, and the highest proline content was obtained from BINA dhan 10 under salt stress. Catalase and ascorbate peroxidase activities significantly decreased in salt-sensitive genotype whereas significantly increased in salt-tolerant ones with increasing salt concentration. However, salt stress significantly decreased guaiacol peroxidase activity in all the rice genotypes irrespective of salt tolerance. K+/Na+ ratio also significantly decreased in shoots and roots of all the rice genotypes. The salt-tolerant genotype BINA dhan 10 maintained higher levels of chlorophyll and proline contents as well as catalase and ascorbate peroxidase activities under salt stress, thus, this might be the underlying mechanism for salt tolerance.

  12. Comparative salinity responses among tomato genotypes and rootstocks

    International Nuclear Information System (INIS)

    Oztekin, G.B.; Tuzel, Y.


    Salinity is a major constraint limiting agricultural crop productivity in the world. However, plant species and cultivars differ greatly in their response to salinity. This study was conducted in a greenhouse to determine the response of 4 commercial tomato rootstocks, 21 cultivars and 8 candidate varieties to salinity stress. Seeds were germinated in peat and when the plants were at the fifth-true leaf stage, salt treatment was initiated except control treatment. NaCl was added to nutrient solution daily with 25 mM concentration and had been reached to 200 mM final concentration. On harvest day, genotypes were classified based on the severity of leaf symptoms caused by NaCl treatment. After symptom scoring, the plants were harvested and leaf number, root length, stem length and diameter per plant were measured. The plants were separated into shoots and roots for dry matter production. Our results showed that, on average, NaCl stress decreased all parameters and the rootstocks gave the highest performance than genotypes. Among all rootstocks, three varieties (2211 and 2275) and ten genotypes (Astona, Astona RN, Caracas, Deniz, Durinta, Export, Gokce, Target, Yeni Talya and 144 HY) were selected as tolerant with slight chlorosis whereas the genotype Malike was selected as sensitive with severe chlorosis. Candidate varieties 2316 and 1482 were the most sensitive ones. Plant growth and dry matter production differed among the tested genotypes. However no correlation was found between plant growth and dry matter production. Rootstock Beaufort gave the highest shoot dry matter although Heman had highest root dry matter. Newton showed more shoot and root dry matter than other genotypes. It is concluded that screening of genotypes based on severity of symptoms at early stage of development and their dry matter production could be used as a tool to indicate genotypic variation to salt stress. (author)

  13. Prevalence of American Foulbrood and Paenibacillus Larvae Genotypes in Bulgaria


    RUSENOVA, Nikolina; PARVANOV, Parvan


    This study aimed to analyse the prevalence of American foulbrood and Paenibacillus larvae genotypes in Bulgaria. For this purpose, data concerning American foulbrood outbreaks were used. Also, available data on the number of destroyed bee families covering a twenty-five-year period (1989 - 2013) was collected from the register of Bulgarian Food Safety Agency. In addition, Paenibacillus larvae genotypes in 15 apiaries were established by rep - PCR with BOXA1R and MBOREP1 primers. Results showe...

  14. Genotype-Specific Measles Transmissibility: A Branching Process Analysis. (United States)

    Ackley, Sarah F; Hacker, Jill K; Enanoria, Wayne T A; Worden, Lee; Blumberg, Seth; Porco, Travis C; Zipprich, Jennifer


    Substantial heterogeneity in measles outbreak sizes may be due to genotype-specific transmissibility. Using a branching process analysis, we characterize differences in measles transmission by estimating the association between genotype and the reproduction number R among postelimination California measles cases during 2000-2015 (400 cases, 165 outbreaks). Assuming a negative binomial secondary case distribution, we fit a branching process model to the distribution of outbreak sizes using maximum likelihood and estimated the reproduction number R for a multigenotype model. Genotype B3 is found to be significantly more transmissible than other genotypes (P = .01) with an R of 0.64 (95% confidence interval [CI], .48-.71), while the R for all other genotypes combined is 0.43 (95% CI, .28-.54). This result is robust to excluding the 2014-2015 outbreak linked to Disneyland theme parks (referred to as "outbreak A" for conciseness and clarity) (P = .04) and modeling genotype as a random effect (P = .004 including outbreak A and P = .02 excluding outbreak A). This result was not accounted for by season of introduction, age of index case, or vaccination of the index case. The R for outbreaks with a school-aged index case is 0.69 (95% CI, .52-.78), while the R for outbreaks with a non-school-aged index case is 0.28 (95% CI, .19-.35), but this cannot account for differences between genotypes. Variability in measles transmissibility may have important implications for measles control; the vaccination threshold required for elimination may not be the same for all genotypes or age groups.

  15. The genetic diversity of hepatitis A genotype I in Bulgaria. (United States)

    Cella, Eleonora; Golkocheva-Markova, Elitsa N; Trandeva-Bankova, Diljana; Gregori, Giulia; Bruni, Roberto; Taffon, Stefania; Equestre, Michele; Costantino, Angela; Spoto, Silvia; Curtis, Melissa; Ciccaglione, Anna Rita; Ciccozzi, Massimo; Angeletti, Silvia


    The purpose of this study was to analyze sequences of hepatitis A virus (HAV) Ia and Ib genotypes from Bulgarian patients to investigate the molecular epidemiology of HAV genotype I during the years 2012 to 2014. Around 105 serum samples were collected by the Department of Virology of the National Center of Infectious and Parasitic Diseases in Bulgaria. The sequenced region encompassed the VP1/2A region of HAV genome. The sequences obtained from the samples were 103. For the phylogenetic analyses, 5 datasets were built to investigate the viral gene in/out flow among distinct HAV subpopulations in different geographic areas and to build a Bayesian dated tree, Bayesian phylogenetic and migration pattern analyses were performed. HAV Ib Bulgarian sequences mostly grouped into a single clade. This indicates that the Bulgarian epidemic is partially compartmentalized. It originated from a limited number of viruses and then spread through fecal-oral local transmission. HAV Ia Bulgarian sequences were intermixed with European sequences, suggesting that an Ia epidemic is not restricted to Bulgaria but can affect other European countries. The time-scaled phylogeny reconstruction showed the root of the tree dating in 2008 for genotype Ib and in 1999 for genotype Ia with a second epidemic entrance in 2003. The Bayesian skyline plot for genotype Ib showed a slow but continuous growth, sustained by fecal-oral route transmission. For genotype Ia, there was an exponential growth followed by a plateau, which suggests better infection control. Bidirectional viral flow for Ib genotype, involving different Bulgarian areas, was observed, whereas a unidirectional flow from Sofia to Ihtiman for genotype Ia was highlighted, suggesting the fecal-oral transmission route for Ia. Copyright © 2017 The Authors. Published by Wolters Kluwer Health, Inc. All rights reserved.

  16. Sex and PRNP genotype determination in preimplantation caprine embryos. (United States)

    Guignot, F; Perreau, C; Cavarroc, C; Touzé, J-L; Pougnard, J-L; Dupont, F; Beckers, J-F; Rémy, B; Babilliot, J-M; Bed'Hom, B; Lamorinière, J M; Mermillod, P; Baril, G


    The objective of this study was to test the accuracy of genotype diagnosis after whole amplification of DNA extracted from biopsies obtained by trimming goat embryos and to evaluate the viability of biopsied embryos after vitrification/warming and transfer. Whole genome amplification (WGA) was performed using Multiple Displacement Amplification (MDA). Sex and prion protein (PRNP) genotypes were determined. Sex diagnosis was carried out by PCR amplification of ZFX/ZFY and Y chromosome-specific sequences. Prion protein genotype determination was performed on codons 142, 154, 211, 222 and 240. Embryos were collected at day 7 after oestrus and biopsied either immediately after collection (blastocysts and expanded blastocysts) or after 24 h of in vitro culture (compacted morulae). Biopsied embryos were frozen by vitrification. Vitrified whole embryos were kept as control. DNA of biopsies was extracted and amplified using MDA. Sex diagnosis was efficient for 97.4% of biopsies and PRNP genotyping was determined in 78.7% of biopsies. After embryo transfer, no significant difference was observed in kidding rate between biopsied and vitrified control embryos, whereas embryo survival rate was different between biopsied and whole vitrified embryos (p = 0.032). At birth, 100% of diagnosed sex and 98.2% of predetermined codons were correct. Offspring PRNP profiles were in agreement with parental genotype. Whole genome amplification with MDA kit coupled with sex diagnosis and PRNP genotype predetermination are very accurate techniques to genotype goat embryos before transfer. These novel results allow us to plan selection of scrapie-resistant genotypes and kid sex before transfer of cryopreserved embryo. © 2010 Blackwell Verlag GmbH.

  17. Evaluation of allelopathic potential of safflower genotypes (Carthamus tinctorius L.

    Directory of Open Access Journals (Sweden)

    Motamedi Marzieh


    Full Text Available Forty safflower genotypes were grown under normal irrigation and drought stress. In the first experiment, the allelopathic potential of shoot residues was evaluated using the sandwich method. Each genotype residue (0.4 g was placed in a sterile Petri dish and two layers of agar were poured on that. Radish seeds were placed on agar medium. The radish seeds were cultivated without safflower residues as the controls. The length of the radicle, hypocotyl, and fresh biomass weight and seed germination percentages were measured. A pot experiment was also done on two genotypes with the highest and two with the lowest allelopathic activity selected after screening genotypes in the first experiment. Before entering the reproductive phase, irrigation treatments (normal irrigation and drought stress were applied. Shoots were harvested, dried, milled and mixed with the topsoil of new pots and then radish seeds were sown. The pots with safflower genotypes were used to evaluate the effect of root residue allelopathy. The shoot length, fresh biomass weight, and germination percentage were measured. Different safflower genotypes showed varied allelopathic potential. The results of the first experiment showed that Egypt and Iran-Khorasan genotypes caused maximum inhibitory responses and Australia and Iran-Kerman genotypes resulted in minimum inhibitory responses on radish seedling growth. Fresh biomass weight had the most sensitivity to safflower residues. The results of the pot experiment were consistent with the results of in vitro experiments. Residues produced under drought stress had more inhibitory effects on the measured traits. Safflower root residue may have a higher level of allelochemicals or different allelochemicals than shoot residue.

  18. Genotypic differences in phosphate nutrition of rice (Oryza Sativa L.)

    International Nuclear Information System (INIS)

    Bui Thi Hong Thanh; Zapata, F.; Bowen, G.D.; Kumarasinghe, K.S.


    Phosphate uptake and use by five genotypes of paddy rice were studied at five phosphate levels in pot studies for 49 days. For all five P levels there were marked genotypic differences in shoot growth, plant dry weight, root/shoot ratios, phosphate uptake and translocation, P content of roots and shoots, and phosphorus use efficiency of shoots (PUE, g shoot mg P -1 in shoot). There were significant genotypic differences in root weight (4 P levels) and in uptake/mg root (all P levels). These latter may have resulted from differences in root weight/root length conversion, root hair development or uptake characteristics, factors which were not studied specifically. Differences between genotypes and P levels in the percentage translocation were partly explicable by differences in P uptake/plant (r = 0.72) but especially by differences in root/shoot ratios (r = 0.89). Differences in PUE were largely a factor of P percentage of the tops (r = 0.94) but significant differences between genotypes were shown as a function of % P. Differences in net photosynthesis rates were largely, but not entirely, due to differences in P % of the shoots. Key factors in P uptake and use and genotypic differences are root growth, uptake/mg root, root/shoot ratios and PUE. (author). 9 refs, 2 figs, 3 tabs


    Directory of Open Access Journals (Sweden)

    Glenn eHyman


    Full Text Available Crop improvement efforts have benefited greatly from advances in available data, computing technology and methods for targeting genotypes to environments. These advances support the analysis of genotype by environment interactions to understand how well a genotype adapts to environmental conditions. This paper reviews the use of spatial analysis to support crop improvement research aimed at matching genotypes to their most appropriate environmental niches. Better data sets are now available on soils, weather and climate, elevation, vegetation, crop distribution and local conditions where genotypes are tested in experimental trial sites. The improved data are now combined with spatial analysis methods to compare environmental conditions across sites, create agro-ecological region maps and assess environment change. Climate, elevation and vegetation data sets are now widely available, supporting analyses that were much more difficult even five or ten years ago. While detailed soil data for many parts of the world remains difficult to acquire for crop improvement studies, new advances in digital soil mapping are likely to improve our capacity. Site analysis and matching and regional targeting methods have advanced in parallel to data and technology improvements. All these developments have increased our capacity to link genotype to phenotype and point to a vast potential to improve crop adaptation efforts.

  20. High prevalence of Hepatitis C virus genotype 6 in Vietnam. (United States)

    Pham, Duc Anh; Leuangwutiwong, Pornsawan; Jittmittraphap, Akanitt; Luplertlop, Nattanej; Bach, Hoa Khanh; Akkarathamrongsin, Srunthron; Theamboonlers, Apiradee; Poovorawan, Yong


    This study aimed to update the prevalence of the various Hepatitis C virus genotypes in Vietnamese blood donors. One hundred and three HCV antibody-positive plasma samples were collected from blood donors at the National Institute of Hematology and Blood Transfusion, Hanoi, Vietnam. All specimens were subjected to RT-PCR of the 5' untranslated region (UTR) to confirm the presence of HCV RNA. The core and NS5B regions of thh positive samples were subsequently amplified by RT-PCR followed by direct sequencing and phylogenetic analysis. Seventy out of 103 samples (68.0%) were RNA positive. Core and NS5B were successfully amplified and sequences were obtained for 70 and 65 samples, respectively. Phylogenetic analysis revealed that genotype 6a was the most predominant among Vietnamese blood donors with a prevalence of 37.1% (26/70), followed by genotype 1a at 30.0% (21/70) and genotype 1b at 17.1% (12/70). The prevalence of two other genotype 6 variants, 6e and 61 was 8.6% and 1.4%, respectively. Further analysis of recent studies showed that the geographic distribution of genotype 6 covered mainly southern China and the mainland of Southeast Asia including Vietnam, Laos, Thailand, and Myanmar. The GenBank accession numbers for the sequences reported in this study are FJ768772-FJ768906.

  1. Evaluation of Different Rice Genotypes Tolerance to Saline Irrigation Water

    Directory of Open Access Journals (Sweden)

    S. Jafari Rad


    Full Text Available To study the responses of seven rice genotypes (Khazar, SA13, Deylam, Sange Joe, Sepidrud, 831 and T5 to different levels of irrigation water salinity, and determining grain yield based on tolerance indices, a CRD based factorial pot experiment with five levels of irrigation water salinity (1, 2, 4, 6 and 8 dSm-1 and three replications was carried out at Rice Research Institute of Iran in 2011. Indices such as SSI, TOL, MP, GMP, HM, STI, YI and YSI were calculated and their correlations with grain yield were estimated for both stress and non-stress conditions. Results indicated significant differences among genotypes and the indices within both conditions. Results also showed that STI and MP indices could be considered as the best indices to screen salt tolerant genotypes. Among the genotypes used in the experiment, T5 produced the highest yield in both non-stress (19.71 g/plant and stress (10.69 g/plant conditions, while the lowest yield in normal (11.84 g/plant and stressful (4.29 g/plant conditions was recorded for Deylam and Khazar, respectively. The highest and the lowest percentage of yield reduction were found in Khazar (69.49% and Sange Joe (31.48% in stressful conditions, respectively. Overall, genotypes T5, 831, Sepidrud and Sange Joe can probably be considered as superior high yielding genotypes in both saline and non-saline conditions for further research.

  2. Genotypic differences in phosphate nutrition of rice (Oryza Sativa L.)

    Energy Technology Data Exchange (ETDEWEB)

    Hong Thanh, Bui Thi; Zapata, F [FAO/IAEA Agriculture and Biotechnology Lab., Seibersdorf (Austria). Soils Science Unit; Bowen, G D; Kumarasinghe, K S [Joint FAO/IAEA Div. of Nuclear Techniques in Food and Agriculture, Vienna (Austria). Soil Fertility, Irrigation and Crop Production Section


    Phosphate uptake and use by five genotypes of paddy rice were studied at five phosphate levels in pot studies for 49 days. For all five P levels there were marked genotypic differences in shoot growth, plant dry weight, root/shoot ratios, phosphate uptake and translocation, P content of roots and shoots, and phosphorus use efficiency of shoots (PUE, g shoot mg P{sup -1} in shoot). There were significant genotypic differences in root weight (4 P levels) and in uptake/mg root (all P levels). These latter may have resulted from differences in root weight/root length conversion, root hair development or uptake characteristics, factors which were not studied specifically. Differences between genotypes and P levels in the percentage translocation were partly explicable by differences in P uptake/plant (r = 0.72) but especially by differences in root/shoot ratios (r = 0.89). Differences in PUE were largely a factor of P percentage of the tops (r = 0.94) but significant differences between genotypes were shown as a function of % P. Differences in net photosynthesis rates were largely, but not entirely, due to differences in P % of the shoots. Key factors in P uptake and use and genotypic differences are root growth, uptake/mg root, root/shoot ratios and PUE. (author). 9 refs, 2 figs, 3 tabs.

  3. Distribution of HCV genotypes among different exposure categories in Brazil

    Directory of Open Access Journals (Sweden)

    Oliveira M.L.A.


    Full Text Available Hepatitis C virus (HCV infection is widespread and responsible for more than 60% of chronic hepatitis cases. HCV presents a genetic variability which has led to viral classification into at least 6 genotypes and a series of subtypes. These variants present characteristic geographical distribution, but their association with different responses to treatment with interferon and severity of disease still remains controversial. The aim of this study was to investigate the patterns of distribution of HCV genotypes among different exposure categories in Brazil. Two hundred and fifty anti-HCV positive samples were submitted to HCV-RNA detection by RT-PCR and their genotype was determined by restriction fragment length polymorphism (RFLP analysis. In addition, the genotype/subtype of 60 samples was also determined by a reverse hybridization assay. HCV 1 was the most prevalent (72.0%, followed by type 3 (25.3%, HCV 2 (2.0% and HCV 4 (0.7%. The HCV genotype distribution varied among the different exposure categories, with HCV 1 being more frequent among blood donors, hemophiliacs and hemodialysis patients. A high frequency of HCV 3 was observed in cirrhotic patients, blood donors from the South of Brazil and injecting drug users (IDUs. The general distribution of the HCV genotype in Brazil is similar to that in other regions of the world.

  4. Genetic diversity of some chili (Capsicum annuum L. genotypes

    Directory of Open Access Journals (Sweden)

    M.J. Hasan


    Full Text Available A study on genetic diversity was conducted with 54 Chili (Capsicum annuum L. genotypes through Mohalanobis’s D2 and principal component analysis for twelve quantitative characters viz. plant height, number of secondary branch/plant, canopy breadth , days to first flowering, days to 50% flowering, fruits/plant, 5 fruits weight, fruit length, fruit diameter, seeds/fruit, 1000 seed weight and yield/plant were taken into consideration. Cluster analysis was used for grouping of 54 chili genotypes and the genotypes were fallen into seven clusters. Cluster II had maximum (13 and cluster III had the minimum number (1 of genotypes. The highest inter-cluster distance was observed between cluster I and III and the lowest between cluster II and VII. The characters yield/plant, canopy breadth, secondary branches/plant, plant height and seeds/fruit contributed most for divergence in the studied genotypes. Considering group distance, mean performance and variability the inter genotypic crosses between cluster I and cluster III, cluster III and cluster VI, cluster II and cluster III and cluster III and cluster VII may be suggested to use for future hybridization program.

  5. Genotyping panel for assessing response to cancer chemotherapy

    Directory of Open Access Journals (Sweden)

    Hampel Heather


    Full Text Available Abstract Background Variants in numerous genes are thought to affect the success or failure of cancer chemotherapy. Interindividual variability can result from genes involved in drug metabolism and transport, drug targets (receptors, enzymes, etc, and proteins relevant to cell survival (e.g., cell cycle, DNA repair, and apoptosis. The purpose of the current study is to establish a flexible, cost-effective, high-throughput genotyping platform for candidate genes involved in chemoresistance and -sensitivity, and treatment outcomes. Methods We have adopted SNPlex for genotyping 432 single nucleotide polymorphisms (SNPs in 160 candidate genes implicated in response to anticancer chemotherapy. Results The genotyping panels were applied to 39 patients with chronic lymphocytic leukemia undergoing flavopiridol chemotherapy, and 90 patients with colorectal cancer. 408 SNPs (94% produced successful genotyping results. Additional genotyping methods were established for polymorphisms undetectable by SNPlex, including multiplexed SNaPshot for CYP2D6 SNPs, and PCR amplification with fluorescently labeled primers for the UGT1A1 promoter (TAnTAA repeat polymorphism. Conclusion This genotyping panel is useful for supporting clinical anticancer drug trials to identify polymorphisms that contribute to interindividual variability in drug response. Availability of population genetic data across multiple studies has the potential to yield genetic biomarkers for optimizing anticancer therapy.

  6. Performance of Garden Pea Genotypes in Eastern Hills of Nepal

    Directory of Open Access Journals (Sweden)

    Krishna Poudel


    Full Text Available Garden pea (Pisum sativum L is an important winter legume used as fresh vegetables and other drier food products. Despite of its importance as cash crop in many parts of Nepal, much study on various aspects for enhancing production and productivity has yet to be done. Therefore, to evaluate the production performance different genotypes of garden pea in eastern hills agro-ecological conditions present experiments were carried out consecutively for two years (2015 and 2016 at Agricultural Research Station, Pakhribas. The experiment comprised of 11 different genotypes of garden pea including a check variety Arkel. The production performance was evaluated in a completely randomized block design with three replications. The seeds were sown at 50 × 10 cm spacing during first week of October for two years. The result showed that DGP-05 genotype had earliest 104 days after sowing. The DGP-08 genotype showed 13 which were the maximum numbers of pods per plant (13, while DGP-01 showed 8 numbers of seeds as the maximum per pod. The DGP-03 genotype had the longest pod of 9.78 cm among others. The highest fresh pod yield of 18.14 t/ha was achieved from genotype DGP-09 followed by Arkel with (16.32 t/ha.

  7. Characterization of some sunflower genotypes using ISSR markers

    International Nuclear Information System (INIS)

    Mokrani, L.; Nabulsi, I.; MirAli, N.


    Sunflower (Helianthus annuus L.) is grown mostly as a source of vegetable oil of high quality and is especially used in food industry. It is generally produced by multinationals and sold as hybrids. Our research, based on two techniques (ISSR and RAPD), is considered as the first one to be interested in molecular characterization of sunflower genotypes in Syria. We used 25 ISSR primers and 13 RAPD primers to study 29 sunflower genotypes and two reference controls belonging to the same family (Calendula officinalis L. and Targets erecta L.). ISSR results revealed a low polymorphism when compared to other studies. We noticed also 11 genotypes genetically related where percent disagreement values (PDV) didn't exceed 1%, they are 7189 - 7191 - 7184 - 7183 - 443 - 441 - Ghab1 -Ghab2 - Ghab3 - Ghab4 - Ghab5 - Madakh halab - Sarghaya4 -Tarkibi knitra. Sarghaya4 and Tarkibi knitra have indeed the lowest yield and some common morphological characters. At the opposite, the genotype Hysum33 has the highest yield and is genetically distant from the other genotypes. All the genotypes could be used in QTL detection as we didn't notice any similarity between them. (author)

  8. Direct maximum parsimony phylogeny reconstruction from genotype data. (United States)

    Sridhar, Srinath; Lam, Fumei; Blelloch, Guy E; Ravi, R; Schwartz, Russell


    Maximum parsimony phylogenetic tree reconstruction from genetic variation data is a fundamental problem in computational genetics with many practical applications in population genetics, whole genome analysis, and the search for genetic predictors of disease. Efficient methods are available for reconstruction of maximum parsimony trees from haplotype data, but such data are difficult to determine directly for autosomal DNA. Data more commonly is available in the form of genotypes, which consist of conflated combinations of pairs of haplotypes from homologous chromosomes. Currently, there are no general algorithms for the direct reconstruction of maximum parsimony phylogenies from genotype data. Hence phylogenetic applications for autosomal data must therefore rely on other methods for first computationally inferring haplotypes from genotypes. In this work, we develop the first practical method for computing maximum parsimony phylogenies directly from genotype data. We show that the standard practice of first inferring haplotypes from genotypes and then reconstructing a phylogeny on the haplotypes often substantially overestimates phylogeny size. As an immediate application, our method can be used to determine the minimum number of mutations required to explain a given set of observed genotypes. Phylogeny reconstruction directly from unphased data is computationally feasible for moderate-sized problem instances and can lead to substantially more accurate tree size inferences than the standard practice of treating phasing and phylogeny construction as two separate analysis stages. The difference between the approaches is particularly important for downstream applications that require a lower-bound on the number of mutations that the genetic region has undergone.

  9. Cloning of the unculturable parasite Pasteuria ramosa and its Daphnia host reveals extreme genotype-genotype interactions. (United States)

    Luijckx, Pepijn; Ben-Ami, Frida; Mouton, Laurence; Du Pasquier, Louis; Ebert, Dieter


    The degree of specificity in host-parasite interactions has important implications for ecology and evolution. Unfortunately, specificity can be difficult to determine when parasites cannot be cultured. In such cases, studies often use isolates of unknown genetic composition, which may lead to an underestimation of specificity. We obtained the first clones of the unculturable bacterium Pasteuria ramosa, a parasite of Daphnia magna. Clonal genotypes of the parasite exhibited much more specific interactions with host genotypes than previous studies using isolates. Clones of P. ramosa infected fewer D. magna genotypes than isolates and host clones were either fully susceptible or fully resistant to the parasite. Our finding enhances our understanding of the evolution of virulence and coevolutionary dynamics in this system. We recommend caution when using P. ramosa isolates as the presence of multiple genotypes may influence the outcome and interpretation of some experiments. © 2010 Blackwell Publishing Ltd/CNRS.

  10. In vitro screening of potato genotypes for osmotic stress tolerance

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    Gelmesa Dandena


    Full Text Available Potato (Solanum tuberosum L. is a cool season crop which is susceptible to both drought and heat stresses. Lack of suitable varieties of the crop adapted to drought-prone areas of the lowland tropics deprives farmers living in such areas the opportunity to produce and use the crop as a source of food and income. As a step towards developing such varieties, the present research was conducted to evaluate different potato genotypes for osmotic stress tolerance under in vitro conditions and identify drought tolerant genotypes for future field evaluation. The experiment was carried out at the Leibniz University of Hannover, Germany, by inducing osmotic stress using sorbitol at two concentrations (0.1 and 0.2 M in the culture medium. A total of 43 genotypes collected from different sources (27 advanced clones from CIP, nine improved varieties, and seven farmers’ cultivars were used in a completely randomized design with four replications in two rounds. Data were collected on root and shoot growth. The results revealed that the main effects of genotype, sorbitol treatment, and their interactions significantly (P < 0.01 influenced root and shoot growthrelated traits. Under osmotic stress, all the measured root and shoot growth traits were significantly correlated. The dendrogram obtained from the unweighted pair group method with arithmetic mean allowed grouping of the genotypes into tolerant, moderately tolerant, and susceptible ones to a sorbitol concentration of 0.2 M in the culture medium. Five advanced clones (CIP304350.100, CIP304405.47, CIP392745.7, CIP388676.1, and CIP388615.22 produced shoots and rooted earlier than all other genotypes, with higher root numbers, root length, shoot and root mass under osmotic stress conditions induced by sorbitol. Some of these genotypes had been previously identified as drought-tolerant under field conditions, suggesting the capacity of the in vitro evaluation method to predict drought stress tolerant

  11. Hepatitis C virus genotypes: A plausible association with viral loads

    Directory of Open Access Journals (Sweden)

    Salma Ghulam Nabi


    Full Text Available Background and Aim: The basic aim of this study was to find out the association of genotypes with host age, gender and viral load. Material and Methods: The present study was conducted at Social Security Hospital, Pakistan. This study included 320 patients with chronic hepatitis C virus (HCV infection who were referred to the hospital between November 2011 and July 2012. HCV viral detection and genotyping was performed and the association was seen between genotypes and host age, gender and viral load. Results : The analysis revealed the presence of genotypes 1 and 3 with further subtypes 1a, 1b, 3a, 3b and mixed genotypes 1b + 3a, 1b + 3b and 3a + 3b. Viral load quantification was carried out in all 151 HCV ribonucleic acid (RNA positive patients. The genotype 3a was observed in 124 (82.12% patients, 3b was found in 21 (13.91%, 1a was seen in 2 (1.32%, 1b in 1 (0.66%, mixed infection with 1b + 3a in 1 (0.66%, 1b + 3b in 1 (0.66% and 3a + 3b was also found in 1 (0.66% patient. Viral load quantification was carried out in all 151 HCV RNA positive patients and was compared between the various genotypes. The mean viral load in patients infected with genotype 1a was 2.75 × 10 6 , 1b 3.9 × 10 6 , 3a 2.65 × 10 6 , 3b 2.51 × 10 6 , 1b + 3a 3.4 × 106, 1b + 3b 2.7 × 106 and 3a + 3b 3.5 × 10 6 . An association between different types of genotypes and viral load was observed. Conclusion : Further studies should be carried out to determine the association of viral load with different genotypes so that sufficient data is available and can be used to determine the type and duration of therapy needed and predict disease outcome.

  12. Smoking and polymorphisms of genes encoding mannose-binding lectin and surfactant protein-D in patients with rheumatoid arthritis

    DEFF Research Database (Denmark)

    Kristiansen, Malthe; Frisch, Morten; Madsen, Hans Ole


    genotype at codon 11, and HLA-shared epitope were determined in 456 patients with rheumatoid arthritis and 533 sex- and age-matched controls. Patients were grouped according to the presence of ACPA antibodies and RA-associated bone erosions and sub-stratified according to smoking status as never or ever...... smokers. Odds ratios with 95% confidence interval (OR, 95% CI) were calculated using multiple logistic regression analyses controlling for shared epitope. The low-producing SFTPD genotype was not associated with risk of RA or ACPA positive RA, but with erosive disease in the RA patients (OR = 1.8; 95% CI...... 1.1-3.0) particularly in RA ever smokers (OR = 2.4; 95% CI 1.3-4.3). The high-producing MBL2 genotype YA/YA was associated with ACPA positive RA (OR = 1.4; 95% CI 1.0-1.9) and erosive joint disease in RA ever smokers (OR = 1.8; 95% CI 1.1-3.0). Genetic disposition for low SP-D was not associated...

  13. A window into the transcriptomic basis of genotype-by-genotype interactions in the legume-rhizobia mutualism. (United States)

    Wood, Corlett W; Stinchcombe, John R


    The maintenance of genetic variation in the benefits provided by mutualists is an evolutionary puzzle (Heath & Stinchcombe, ). Over time, natural selection should favour the benefit strategy that confers the highest fitness, eroding genetic variation in partner quality. Yet abundant genetic variation in partner quality exists in many systems (Heath & Stinchcombe, ). One possible resolution to this puzzle is that the genetic identity of both a host and its partner affects the benefits each mutualist provides to the other, a pattern known as a genotype-by-genotype interaction (Figure ). Mounting evidence suggests that genotype-by-genotype interactions between partners are pervasive at the phenotypic level (Barrett, Zee, Bever, Miller, & Thrall, ; Heath, ; Hoeksema & Thompson, ). Ultimately, however, to link these phenotypic patterns to the maintenance of genetic variation in mutualisms we need to answer two questions: How much variation in mutualism phenotypes is attributable to genotype-by-genotype interactions, and what mutualistic functions are influenced by each partner and by the interaction between their genomes? In this issue of Molecular Ecology, Burghardt et al. (2017) use transcriptomics to address both questions in the legume-rhizobia mutualism. © 2017 John Wiley & Sons Ltd.

  14. integrated analysis for genotypic adaptation in rice abstract résumé

    African Journals Online (AJOL)


    The presence of genotype by environment (GxE) interaction plays a crucial role in determining the performance of ... assess yield performance, stability and adaptability of thirty-six rice genotypes of three different maturity groups evaluated ..... Pooled analysis of variance for grain yield in mid-early rice genotypes. Genotypes ...

  15. General-Purpose Genotype or How Epigenetics Extend the Flexibility of a Genotype

    Directory of Open Access Journals (Sweden)

    Rachel Massicotte


    Full Text Available This project aims at investigating the link between individual epigenetic variability (not related to genetic variability and the variation of natural environmental conditions. We studied DNA methylation polymorphisms of individuals belonging to a single genetic lineage of the clonal diploid fish Chrosomus eos-neogaeus sampled in seven geographically distant lakes. In spite of a low number of informative fragments obtained from an MSAP analysis, individuals of a given lake are epigenetically similar, and methylation profiles allow the clustering of individuals in two distinct groups of populations among lakes. More importantly, we observed a significant pH variation that is consistent with the two epigenetic groups. It thus seems that the genotype studied has the potential to respond differentially via epigenetic modifications under variable environmental conditions, making epigenetic processes a relevant molecular mechanism contributing to phenotypic plasticity over variable environments in accordance with the GPG model.

  16. Screening of cotton (gossypium hirsutum l.) genotypes for heat tolerance

    International Nuclear Information System (INIS)

    Abro, S.; Khan, M.A.; Sial, M.A.


    Cotton yield is highly affected due to biotic (diseases and pests) and abiotic (heat, dought and salinity) Stresses. Among them, high temperature is the main environmental constraint which adversely reduces cotton yield and quality. High temperature above 36 degree C affects plant growth and development especially during reproductive phase. Present studies were carried out to assess the tolerance of fifty-eight newly evolved cotton genotypes to heat stresses, based on agronomic and physiological characteristics. The genotypes were screened in field conditions under two temperature regimes. The studies were conducted at experimental farm of Nuclear Institute of Agriculture, Tando Jam, Pakistan. The results showed that March sown crop experienced high temperature (i.e. > 44 degree C in May and June), which significantly affected crop growth and productivity. The genotypes were identified as heat-tolerant on the basis of relative cell injury percentage (RCI %), heat susceptibility index (HSI) values, boll retention and seed cotton yield (kg/ha). RCI level in cotton genotypes ranged from 39.0 to 86.0%. Out of 58, seventeen genotypes (viz.NIA-80, NIA-81, NIA-83, NIA-84, NIA-M-30, NIA-M31, NIA-HM-48, NIA-HM-327, NIA-H-32, NIA-HM-2-1, NIA-Bt1, NIA-Bt2, NIA-Perkh, CRIS-342, CRIS-134, NIAB-111 and check variety Sadori indicated high level of heat tolerance at both (heat-stressed and non-stressed) temperature regimes; as shown the lowest relative injury level and relatively heat resistant index (HSI<1) values. Such genotypes could be used as heattolerant genotypes under heat-stressed environments. (author)

  17. Is incidence of multiple HPV genotypes rising in genital infections?

    Directory of Open Access Journals (Sweden)

    Amir Sohrabi


    Full Text Available Frequency of cervical cancer related to Human Papilloma Virus (HPV has increased remarkably in less-developed countries. Hence, applying capable diagnostic methods is urgently needed, as is having a therapeutic strategy as an effective step for cervical cancer prevention. The aim of this study was to investigate the prevalence of various multi-type HPV infection patterns and their possible rising incidence in women with genital infections.This descriptive study was conducted on women who attended referral clinical laboratories in Tehran for genital infections from January 2012 until December 2013. A total of 1387 archival cervical scraping and lesion specimens were collected from referred women. HPV genotyping was performed using approved HPV commercial diagnostic technologies with either INNO-LiPA HPV or Geno Array Test kits.HPV was positive in 563 cases (40.59% with mean age of 32.35 ± 9.96. Single, multiple HPV genotypes and untypable cases were detected in 398 (70.69%, 160 (28.42% and 5 (0.89% cases, respectively. Multiple HPV infections were detected in 92 (57.5%, 42 (26.2%, 17 (10.6% and 9 (5.7% cases as two, three, four and five or more genotypes, respectively. The prevalence of 32 HPV genotypes was determined one by one. Seventeen HPV genotypes were identified in 95.78% of all positive infections. Five dominant genotypes, HPV6, 16, 53, 11 and 31, were identified in a total of 52.35%of the HPV positive cases.In the present study, we were able to evaluate the rate of multiple HPV types in genital infections. Nevertheless, it is necessary to evaluate the role of the dominant HPV low-risk types and the new probably high-risk genotypes, such as HPV53, in the increasing incidences of genital infections. Keywords: Multiple HPV Types, Incidence, Genital infection, Cervical cancer, Iran

  18. The Comparison of Growth, Slaughter and Carcass Traits of Meat Chicken Genotype Produced by Back-Crossing with A Commercial Broiler Genotype


    Musa Sarıca; Umut Sami Yamak; Mehmet Akif Boz; Ahmet Uçar


    This study was conducted to determine the growth and some slaughter traits between commercial fast growing chickens and three-way cross M2 genotypes. 260 male female mixed chickens from each genotype was reared 10 replicate per genotype in the same house. Two different slaughtering ages were applied to commercial chickens and slaughtered at 6 and 7 weeks of age for comparing with cross genotypes. F chickens reached to slaughtering age at 42 days, whereas cross groups reached at 49 days. Genot...

  19. Physiological responses of genotypes soybean to simulated drought stress

    Directory of Open Access Journals (Sweden)

    Eleonóra Krivosudská


    Full Text Available The objective of this research was to investigate possible genetic variation in the sensitivity of soybean cultivars for nitrogen fixation rates in response to soil drying. The work confirmed that the selected physiological characteristics (RWC, osmotic potential, stress index and created nodules on roots are good evaluating parameters for the determination of water stress in plant. In the floricultural year 2014 an experiment with four genetic resources of soybean was launched. Sowing of Maverick (USA, Drina (HRV, Nigra (SVK and Polanka (CZK genotypes was carried out in the containers of 15 l capacity. This stress had a negative impact on the physiological parameters. By comparing the RWC values, the decrease was more significant at the end of dehydration, which was monitored in Maverick and Drina genotypes using the Nitrazon inoculants and water stress effect. Inoculated stressed Nigra and Polanka genotypes have kept higher water content till the end of dehydration period. Also the proline accumulation was monitored during the water stress, whilst higher content of free proline reached of Maverick. More remarkable decrease of osmotic potential was again registered in a foreign Drina and Maverick genotypes in the inoculated variations. Nigra and Polanka genotypes responses not so significant in the given conditions.

  20. Resistance of citrus genotypes to Phyllocnitis citrella Stainton (Lepidoptera: Gracillariidae). (United States)

    Santos, M S; Vendramim, J D; Lourenção, A L; Pitta, R M; Martins, E S


    The development and reproduction of the citrus leafminer (CLM), Phyllocnistis citrella Stainton, were evaluated in six citrus genotypes in order to identify genotypes with resistance traits that could be applied in a program for the development of citrus varieties resistant to the citrus leafminer. Tests were conducted under controlled laboratory conditions (25 ± 1ºC, 70 ± 10% RH, and 14h photophase). Seedlings of each genotype tested were infested with eggs obtained from a stock colony of CLM maintained on 'Cravo' lemon (Citrus limonia L. Osbeck), and the duration and survival of the eggs, larval and pupal stages, pupal size and weight, fecundity and longevity of adults, and sex ratio were evaluated. No influence was observed on the duration and survival of eggs, larvae and pupae of P. citrella. However, pupae obtained in the hybrid C x R(4) were significantly smaller and lighter than pupae from the remaining treatments. Adult females from the hybrids C x R(4) and C x R(315) were the least fecund. However, the lowest value for the corrected reproductive potential (CRP) was recorded in the hybrid C x R(315), suggesting that this genotype is the least favorable for the development and reproduction of CLM. On the other hand, the highest CRP value obtained in the 'Rugoso' lemon confirms the susceptibility of this genotype, indicating it as the most suitable for CLM.

  1. Phenotypic characterization of papaya genotypes to determine powdery mildew resistance

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    Marcelo Vivas


    Full Text Available In support of breeding of papaya (Carica papaya, the disease incidence and severity of powdery mildew (Ovulariopsis caricicola were evaluated in papaya genotypes. Two experiments in complete randomized blocks were carried out, one in the field and the other in a greenhouse. In field experiments, the lowest mean disease incidence was observed on the genotypes ‘Costa Rica’ and ‘Baixinho Super’, and the lowest mean disease severity on ‘Caliman M5’, ‘GTF’, ‘SH 11-08’, and ‘JS 11’. In the greenhouse experiment, the genotypes ‘Caliman M5’, ‘Golden’, ‘Kapoho Solo’, ‘Waimanalo’, ‘Mamão Bené’, ‘SH 12-07’, ‘JS 12’, and ‘GTF’ had the lowest mean incidence in at least one evaluation. On the other hand, for severity, the genotypes ‘Diva’, ‘Sunrise Solo 72/12’, ‘Kapoho Solo PA’, ‘Waimanalo’, ‘Maradol’, ‘Maradol GL’, ‘SH 15-04’, ‘FMV, ‘JS 12-4’, ‘SH 12-07’ and ‘Sekati FLM’ had the lowest means. These results indicate these genotypes for a possible use in breeding for reduction of powdery mildew intensity

  2. Methods for MHC genotyping in non-model vertebrates. (United States)

    Babik, W


    Genes of the major histocompatibility complex (MHC) are considered a paradigm of adaptive evolution at the molecular level and as such are frequently investigated by evolutionary biologists and ecologists. Accurate genotyping is essential for understanding of the role that MHC variation plays in natural populations, but may be extremely challenging. Here, I discuss the DNA-based methods currently used for genotyping MHC in non-model vertebrates, as well as techniques likely to find widespread use in the future. I also highlight the aspects of MHC structure that are relevant for genotyping, and detail the challenges posed by the complex genomic organization and high sequence variation of MHC loci. Special emphasis is placed on designing appropriate PCR primers, accounting for artefacts and the problem of genotyping alleles from multiple, co-amplifying loci, a strategy which is frequently necessary due to the structure of the MHC. The suitability of typing techniques is compared in various research situations, strategies for efficient genotyping are discussed and areas of likely progress in future are identified. This review addresses the well established typing methods such as the Single Strand Conformation Polymorphism (SSCP), Denaturing Gradient Gel Electrophoresis (DGGE), Reference Strand Conformational Analysis (RSCA) and cloning of PCR products. In addition, it includes the intriguing possibility of direct amplicon sequencing followed by the computational inference of alleles and also next generation sequencing (NGS) technologies; the latter technique may, in the future, find widespread use in typing complex multilocus MHC systems. © 2009 Blackwell Publishing Ltd.

  3. Does Sex Trade with Violence among Genotypes in Drosophila melanogaster? (United States)

    Cabral, Larry G.; Foley, Brad R.; Nuzhdin, Sergey V.


    The evolutionary forces shaping the ability to win competitive interactions, such as aggressive encounters, are still poorly understood. Given a fitness advantage for competitive success, variance in aggressive and sexual display traits should be depleted, but a great deal of variation in these traits is consistently found. While life history tradeoffs have been commonly cited as a mechanism for the maintenance of variation, the variability of competing strategies of conspecifics may mean there is no single optimum strategy. We measured the genetically determined outcomes of aggressive interactions, and the resulting effects on mating success, in a panel of diverse inbred lines representing both natural variation and artificially selected genotypes. Males of one genotype which consistently lost territorial encounters with other genotypes were nonetheless successful against males that were artificially selected for supernormal aggression and dominated all other lines. Intransitive patterns of territorial success could maintain variation in aggressive strategies if there is a preference for territorial males. Territorial success was not always associated with male mating success however and females preferred ‘winners’ among some male genotypes, and ‘losers’ among other male genotypes. This suggests that studying behaviour from the perspective of population means may provide limited evolutionary and genetic insight. Overall patterns of competitive success among males and mating transactions between the sexes are consistent with mechanisms proposed for the maintenance of genetic variation due to nonlinear outcomes of competitive interactions. PMID:18414669

  4. Lead enrichment in different genotypes of rice grains. (United States)

    Chen, Gang; Sun, Guo-rong; Liu, Ai-ping; Zhou, Wei-dong


    Using environmental scanning electron microscopy and X-ray electron probe microanalysis, the lead content was studied in inner and outer surface of rice glume, surface of caryopsis, center of caryopsis, near aleuronic layer and aleuronic layer in 21 genotypes of rice grains. The results showed that the lead content in different part of 21 genotypes of rice grains changed as inner surface of rice glume > aleuronic layer > near aleuronic layer > surface of caryopsis > outer surface of rice glume > center of caryopsis. There were genetic differences in lead enrichment in different genotypes of rice grains, which reflected as the differences of lead content in the same part and different part of rice grains. In different genotypes of rice grains, there were significant non-linear correlations between lead content in the inner surface of rice glume, center of caryopsis, aleuronic layer and that in the other parts of rice grain. The results also indicated that the lead enrichment in the center of caryopsis regulated by glume and aleuronic layer. In addition, in different genotypes of rice grains, there were differences in regulation of lead enrichment among different parts, which changed non-linearly.

  5. Productivity of Upland Rice Genotypes under Different Nitrogen Doses

    Energy Technology Data Exchange (ETDEWEB)

    Traore, K.; Traore, O. [INERA /Station de Farakoba, Bobo-Dioulasso (Burkina Faso); Bado, V. B. [Africa Rice Center (AfricaRice), Saint Louis (Senegal)


    Nitrogen (N) deficiency is one of the most yield-limiting nutrients in upland rice growing area in Burkina Faso. A field experiment was carried out from 2008 to 2010 in Farakoba research center with the objective to evaluate 200 upland rice (Oryza sativa L.) genotypes from WAB, NERICA, CNA, CNAX, IRAT and IR lines for N use efficiency. The treatments consisted of three levels of N: low, medium and high at 20, 60 and 100 kg-N h{sup a-1}, respectively. Both grain and straw yield increased with N application. The yields were highest for NERICA and WAB lines compared to the other lines, and this was consistent over the N doses. A large variability was found among the genotypes. Three groups of genotypes were identified according to N use efficiency. The high N use efficiency genotypes were found in WAB and NERICA lines. The N concentration in the shoot at flowering significantly increased with N doses and this was similar for N taken up by genotypes. (author)

  6. Agronomical and phytochemical evaluation of Stevia rebaudiana genotypes

    Directory of Open Access Journals (Sweden)

    Vouillamoz, José F.


    Full Text Available The agronomical potential and the phytochemical variability of 18 genotypes of the Paraguayan plant Stevia rebaudiana have been investigated in Switzerland in order identify the best genotype for local cultivation. Over a two years period, yields in dry leaves ranged from 10 to 170 g m-2, with a percentage of leaves ranging from 53 to 75 %. HPLC analyses showed a notable variability in phytochemical composition, with stevioside content ranging from 0.3 to 7.9 % w/w and rebaudioside A from 0.3 to 6.5 % w/w. Cultivation of S. rebaudiana in Switzerland is feasible. With a density of 10 plants per m2, the potential yields of dry matter are approximately 1-2 t ha-1. The most productive genotypes (Pharmasaat, Hem Zaden, Stepa and Mediplant 3 and 11 will be submitted to the industry for organoleptic evaluation.

  7. Comparative analysis of minor histocompatibility antigens genotyping methods

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    A. S. Vdovin


    Full Text Available The wide range of techniques could be employed to find mismatches in minor histocompatibility antigens between transplant recipients and their donors. In the current study we compared three genotyping methods based on polymerase chain reaction (PCR for four minor antigens. Three of the tested methods: allele-specific PCR, restriction fragment length polymorphism and real-time PCR with TaqMan probes demonstrated 100% reliability when compared to Sanger sequencing for all of the studied polymorphisms. High resolution melting analysis was unsuitable for genotyping of one of the tested minor antigens (HA-1 as it has linked synonymous polymorphism. Obtained data could be used to select the strategy for large-scale clinical genotyping.


    Directory of Open Access Journals (Sweden)

    Marián KOTRLA


    Full Text Available Deliberate cultivation of plants for energy biomass is becoming increasingly important. Biomass should significantly contribute to increase the share of renewable energy in the European Union. On the research locality of Slovak University of Agriculture in Nitra localized in the village Kolíňany (Slovak Republic is implemented basic research focused on the growth and production of the two genotypes energy grass Miscanthus. Research is carried out since 2010. In the third year after planting (the year 2012 were confirmed biomass production depending on the genotype of 35.45 and 36.67 t ha-1. Based on the analysis of growth and production performance of Miscanthus genotypes can be evaluated the high environmental and socio-economic aspects of growing energy crops, depending on the specific agro-ecological conditions.

  9. Models for genotype by environment interaction estimation on halomorphic soil

    Directory of Open Access Journals (Sweden)

    Dimitrijević Miodrag


    Full Text Available In genotype by environment interaction estimation, as well as, in total trial variability anal­ysis several models are in use. The most often used are Analysis of variance, Eberhart and Russell model and AMMI model. Each of the models has its own specificities, in the way of sources of varia­tion comprehension and treatment. It is known that agriculturally less productive environments increase errors, dimmish reaction differences between genotypes and decrease repeatability of conditions during years. A sample consisting on six bread wheat varieties was studied in three veg­etation periods on halomorphic soil, solonetz type in Banat (vil. Kumane. Genotype by environ­ment interaction was quantified using ANOVA, Eberhart and Russell model and AMMI model. The results were compared not only on pure solonetz soil (control, but also on two level of ameliora­tion (25 and 50t/ha phosphor-gypsum.

  10. Distribution of Human papilloma virus genotypes in cervical cancer tissues

    Directory of Open Access Journals (Sweden)

    Stamenković M.


    Full Text Available Cervical cancer incidence and mortality rates in Serbia are among the highest in Europe and data on Human papilloma virus (HPV type distribution are scarce. The aim of this study was to determine the prevalence of HPV types in archival specimens of cervical cancer tissues of women in the Serbian population. A total of 45 paraffin-embedded tissue samples of cervical carcinoma were used in this study. The procedure included deparaffinization of tissue samples, DNA extraction, PCR, gel electrophoresis and HPV genotyping by direct sequencing. HPV was detected in 32 samples (71%. Genotyping revealed the presence of 6 high-risk HPV types 16, 18, 33, 45, 53 and 58, where HPV type 16 was the most prevalent type (73.7%. The results of this study and further studies will provide more detailed information about HPV genotype distribution and may contribute to the formulation of national guidelines for the prevention of cervical cancer. [175073

  11. Carcass traits and meat quality of two different rabbit genotypes

    Directory of Open Access Journals (Sweden)

    Maria D'Agata


    Full Text Available To evaluate the effect of genotype on carcass traits and meat quality, thirty-two rabbits for two genotypes (local population – LP; commercial hybrids – HY were used. Rabbits were weaned at 35 days old and slaughtered at 103 days of age for LP and 87 days of age for HY. Comparing the slaughtering traits of two genotypes, LP provided higher dressing out (59.4% vs 56.2%, Pvs 14.2%, Pvs 22.3, Pvs 8,9%, Pvs 0.86%, Pvs 1.12%; Pvs 19.2%; Pvs 31.6%; Pvs 3.8%; P*, higher redness (a*, yellowness (b* and C* value than HY (P

  12. Measles virus genotypes circulating in India, 2011-2015. (United States)

    Vaidya, Sunil R; Chowdhury, Deepika T


    The Government of India is accepted to participate in the measles elimination and rubella control goal 2020, hence genetic characterization of measles viruses (MeV) becomes essential. At National Reference Laboratory (National Institute of Virology, Pune), the throat swabs/urine specimens (n = 380) or PCR products (n = 219) obtained from the suspected measles cases were referred for the molecular testing and subsequently, MeV nucleoprotein (N) gene sequencing/genotyping. In addition, 2,449 suspected measles cases, mainly from the Maharashtra state were referred for the laboratory diagnosis. A detailed study was performed on N gene sequences obtained during last two decades. Indian MeV sequences obtained during 2011-2015 were compared with 1996-2010 sequences and genetic divergence was studied. Circulation of measles genotypes B3 (n = 3), D4 (n = 49), and D8 (n = 351) strains were observed in 19 States and three Union Territories of India. In addition, 64 measles viruses were isolated from 253 throat swab or urine specimens obtained from the suspected measles cases. During 2011-2015, 67.9% (1,663/2,449) suspected measles cases were laboratory confirmed. Molecular studies showed circulation of measles genotype B3 in India along with prominently circulating genotypes D4 and D8 except D7 strains. The genetic diversion within Indian B3, D4, and D8 genotypes was 0.3%, 1.1%, and 2.1%, respectively. The genetic divergence of Indian B3, D4, and D8 measles strains with the WHO reference sequences was 2.5%, 2.6%, and 1.8%, respectively. It is crucial data for national immunization program. More measles/rubella genotyping studies are necessary to track transmission and to support measles elimination and rubella control. J. Med. Virol. 89:753-758, 2017. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  13. Genomic prediction when some animals are not genotyped

    Directory of Open Access Journals (Sweden)

    Lund Mogens S


    Full Text Available Abstract Background The use of genomic selection in breeding programs may increase the rate of genetic improvement, reduce the generation time, and provide higher accuracy of estimated breeding values (EBVs. A number of different methods have been developed for genomic prediction of breeding values, but many of them assume that all animals have been genotyped. In practice, not all animals are genotyped, and the methods have to be adapted to this situation. Results In this paper we provide an extension of a linear mixed model method for genomic prediction to the situation with non-genotyped animals. The model specifies that a breeding value is the sum of a genomic and a polygenic genetic random effect, where genomic genetic random effects are correlated with a genomic relationship matrix constructed from markers and the polygenic genetic random effects are correlated with the usual relationship matrix. The extension of the model to non-genotyped animals is made by using the pedigree to derive an extension of the genomic relationship matrix to non-genotyped animals. As a result, in the extended model the estimated breeding values are obtained by blending the information used to compute traditional EBVs and the information used to compute purely genomic EBVs. Parameters in the model are estimated using average information REML and estimated breeding values are best linear unbiased predictions (BLUPs. The method is illustrated using a simulated data set. Conclusions The extension of the method to non-genotyped animals presented in this paper makes it possible to integrate all the genomic, pedigree and phenotype information into a one-step procedure for genomic prediction. Such a one-step procedure results in more accurate estimated breeding values and has the potential to become the standard tool for genomic prediction of breeding values in future practical evaluations in pig and cattle breeding.

  14. Genotyping of Brucella species using clade specific SNPs

    Directory of Open Access Journals (Sweden)

    Foster Jeffrey T


    Full Text Available Abstract Background Brucellosis is a worldwide disease of mammals caused by Alphaproteobacteria in the genus Brucella. The genus is genetically monomorphic, requiring extensive genotyping to differentiate isolates. We utilized two different genotyping strategies to characterize isolates. First, we developed a microarray-based assay based on 1000 single nucleotide polymorphisms (SNPs that were identified from whole genome comparisons of two B. abortus isolates , one B. melitensis, and one B. suis. We then genotyped a diverse collection of 85 Brucella strains at these SNP loci and generated a phylogenetic tree of relationships. Second, we developed a selective primer-extension assay system using capillary electrophoresis that targeted 17 high value SNPs across 8 major branches of the phylogeny and determined their genotypes in a large collection ( n = 340 of diverse isolates. Results Our 1000 SNP microarray readily distinguished B. abortus, B. melitensis, and B. suis, differentiating B. melitensis and B. suis into two clades each. Brucella abortus was divided into four major clades. Our capillary-based SNP genotyping confirmed all major branches from the microarray assay and assigned all samples to defined lineages. Isolates from these lineages and closely related isolates, among the most commonly encountered lineages worldwide, can now be quickly and easily identified and genetically characterized. Conclusions We have identified clade-specific SNPs in Brucella that can be used for rapid assignment into major groups below the species level in the three main Brucella species. Our assays represent SNP genotyping approaches that can reliably determine the evolutionary relationships of bacterial isolates without the need for whole genome sequencing of all isolates.

  15. Rotavirus genotypes associated with acute diarrhea in Egyptian infants. (United States)

    Ahmed, Salwa F; Mansour, Adel M; Klena, John D; Husain, Tupur S; Hassan, Khaled A; Mohamed, Farag; Steele, Duncan


    Before the introduction of rotavirus vaccine in Egypt, information on the burden of disease and the circulating rotavirus genotypes is critical to monitor vaccine effectiveness. A cohort of 348 Egyptian children was followed from birth to 2 years of age with twice-weekly home visits to detect diarrheal illness. VP7 and VP4 genes were genotyped by reverse-transcription polymerase chain reaction and DNA sequencing. Forty percentage of children had rotavirus-associated diarrhea at least once by their second birthday. One hundred and twelve children experienced a single rotavirus diarrheal episodes (RDE) at a median age of 9 months; while 27 infants had their second RDE at a median age of 15 months and 1 infant had 3 RDE at the age of 2, 16 and 22 months. Of the 169 RDE, 82% could be assigned a G-type, while 58% had been identified a P-type. The most prevalent genotype was G2 (32%), followed by G1 (24%) and G9 (19%). G2P[4] rotavirus episodes were significantly associated with fever (P = 0.03) and vomiting (P = 0.06) when compared with other genotypes. G2 strains were the predominant genotype causing 50% of the second RDE while G9 represented 25% of the second RDE. Genotypes identified are similar to those detected globally except for absence of G4. Our finding that 75% of the second RDE were due to G2 and G9 indicates a possible reduction in natural protection afforded by these types compared with G1, where 90% of G1 cases did not experience a second xposure, indicating greater protection against recurrent symptomatic infection.

  16. Phenotype- and genotype-specific structural alterations in spasmodic dysphonia. (United States)

    Bianchi, Serena; Battistella, Giovanni; Huddleston, Hailey; Scharf, Rebecca; Fleysher, Lazar; Rumbach, Anna F; Frucht, Steven J; Blitzer, Andrew; Ozelius, Laurie J; Simonyan, Kristina


    Spasmodic dysphonia is a focal dystonia characterized by involuntary spasms in the laryngeal muscles that occur selectively during speaking. Although hereditary trends have been reported in up to 16% of patients, the causative etiology of spasmodic dysphonia is unclear, and the influences of various phenotypes and genotypes on disorder pathophysiology are poorly understood. In this study, we examined structural alterations in cortical gray matter and white matter integrity in relationship to different phenotypes and putative genotypes of spasmodic dysphonia to elucidate the structural component of its complex pathophysiology. Eighty-nine patients with spasmodic dysphonia underwent high-resolution magnetic resonance imaging and diffusion-weighted imaging to examine cortical thickness and white matter fractional anisotropy in adductor versus abductor forms (distinct phenotypes) and in sporadic versus familial cases (distinct genotypes). Phenotype-specific abnormalities were localized in the left sensorimotor cortex and angular gyrus and the white matter bundle of the right superior corona radiata. Genotype-specific alterations were found in the left superior temporal gyrus, supplementary motor area, and the arcuate portion of the left superior longitudinal fasciculus. Our findings suggest that phenotypic differences in spasmodic dysphonia arise at the level of the primary and associative areas of motor control, whereas genotype-related pathophysiological mechanisms may be associated with dysfunction of regions regulating phonological and sensory processing. Identification of structural alterations specific to disorder phenotype and putative genotype provides an important step toward future delineation of imaging markers and potential targets for novel therapeutic interventions for spasmodic dysphonia. © 2017 International Parkinson and Movement Disorder Society. © 2017 International Parkinson and Movement Disorder Society.

  17. Direct maximum parsimony phylogeny reconstruction from genotype data

    Directory of Open Access Journals (Sweden)

    Ravi R


    Full Text Available Abstract Background Maximum parsimony phylogenetic tree reconstruction from genetic variation data is a fundamental problem in computational genetics with many practical applications in population genetics, whole genome analysis, and the search for genetic predictors of disease. Efficient methods are available for reconstruction of maximum parsimony trees from haplotype data, but such data are difficult to determine directly for autosomal DNA. Data more commonly is available in the form of genotypes, which consist of conflated combinations of pairs of haplotypes from homologous chromosomes. Currently, there are no general algorithms for the direct reconstruction of maximum parsimony phylogenies from genotype data. Hence phylogenetic applications for autosomal data must therefore rely on other methods for first computationally inferring haplotypes from genotypes. Results In this work, we develop the first practical method for computing maximum parsimony phylogenies directly from genotype data. We show that the standard practice of first inferring haplotypes from genotypes and then reconstructing a phylogeny on the haplotypes often substantially overestimates phylogeny size. As an immediate application, our method can be used to determine the minimum number of mutations required to explain a given set of observed genotypes. Conclusion Phylogeny reconstruction directly from unphased data is computationally feasible for moderate-sized problem instances and can lead to substantially more accurate tree size inferences than the standard practice of treating phasing and phylogeny construction as two separate analysis stages. The difference between the approaches is particularly important for downstream applications that require a lower-bound on the number of mutations that the genetic region has undergone.


    Directory of Open Access Journals (Sweden)

    Mathew Zachariah


    Full Text Available Objectives: Our objective was to study mannose binding protein (MBP polymorphisms in exonic and promoter region and correlate associated infections and vasoocculsive (VOC episodes, since MBP plays an important role in innate immunity by activating the complement system. Methods: We studied the genetic polymorphisms in the Exon 1 (alleles A/O and promoter region (alleles Y/X; H/L, P/Q of the MBL2 gene, in sickle cell disease (SCD patients as increased incidence of infections is seen in these patients. A PCR-based, targeted genomic DNA sequencing of MBL2 was used to study 68 SCD Omani patients and 44 controls (voluntary blood donors. Results: The observed frequencies of MBL2 promoter polymorphism (-221, Y/X were 44.4% and 20.5% for the heterozygous genotype Y/X and 3.2% and 2.2% for the homozygous (X/X respectively between SCD patients and controls. MBL2 Exon1 gene mutations were 29.4% and 50% for the heterozygous genotype A/O and 5.9% and 6.8% respectively for the homozygous (O/O genotype between SCD patients and controls. The distribution of variant MBL2 polymorphisms did not show any correlation in SCD patients with or without vasoocculsive crisis (VOC attacks (p=0.162; OR-0.486; CI=0.177 -1.33, however, it was correlated with infections (p=0.0162; OR-3.55; CI 1.25-10.04. Conclusions: Although the frequency of the genotypes and haplotypes of MBL2 in SCD patients did not differ from controls, overall in the SCD patient cohort the increased representation of variant alleles was significantly correlated with infections (p<0.05. However, these variant MBL2 polymorphisms did not seem to play a significant role in the VOC episodes in this SCD cohort. Keywords: Mannose-binding lectin, polymorphism, promoter, Sickle cell disease, MBL2, MBP

  19. Procedures for identifying S-allele genotypes of Brassica. (United States)

    Wallace, D H


    Procedures are described for efficient selection of: (1) homozygous and heterozygous S-allele genotypes; (2) homozygous inbreds with the strong self- and sib-incompatibility required for effective seed production of single-cross F1 hybrids; (3) heterozygous genotypes with the high self- and sib-incompatibility required for effective seed production of 3- and 4-way hybrids.From reciprocal crosses between two first generation inbred (I1) plants there are three potential results: both crosses are incompatible; one is incompatible and the other compatible; and both are compatible. Incompatibility of both crosses is useful information only when combined with data from other reciprocal crosses. Each compatible cross, depending on whether its reciprocal is incompatible or compatible, dictates alternative reasoning and additional reciprocal crosses for efficiently and simultaneously identifying: (A) the S-allele genotype of all individual I1 plants, and (B) the expressions of dominance or codominance in pollen and stigma (sexual organs) of an S-allele heterozygous genotype. Reciprocal crosses provide the only efficient means of identifying S-allele genotypes and also the sexual-organ x S-allele-interaction types.Fluorescent microscope assay of pollen tube penetration into the style facilitates quantitation within 24-48 hours of incompatibility and compatibility of the reciprocal crosses. A procedure for quantitating the reciprocal difference is described that maximizes informational content of the data about interactions between S alleles in pollen and stigma of the S-allele-heterozygous genotype.Use of the non-inbred Io generation parent as a 'known' heterozygous S-allele genotype in crosses with its first generation selfed (I1) progeny usually reduces at least 7 fold the effort required for achieving objectives 1, 2, and 3, compared to the method of making reciprocal crosses only among I1 plants.Identifying the heterozygous and both homozygous S-allele genotypes during

  20. Nephele: genotyping via complete composition vectors and MapReduce

    Directory of Open Access Journals (Sweden)

    Mardis Scott


    Full Text Available Abstract Background Current sequencing technology makes it practical to sequence many samples of a given organism, raising new challenges for the processing and interpretation of large genomics data sets with associated metadata. Traditional computational phylogenetic methods are ideal for studying the evolution of gene/protein families and using those to infer the evolution of an organism, but are less than ideal for the study of the whole organism mainly due to the presence of insertions/deletions/rearrangements. These methods provide the researcher with the ability to group a set of samples into distinct genotypic groups based on sequence similarity, which can then be associated with metadata, such as host information, pathogenicity, and time or location of occurrence. Genotyping is critical to understanding, at a genomic level, the origin and spread of infectious diseases. Increasingly, genotyping is coming into use for disease surveillance activities, as well as for microbial forensics. The classic genotyping approach has been based on phylogenetic analysis, starting with a multiple sequence alignment. Genotypes are then established by expert examination of phylogenetic trees. However, these traditional single-processor methods are suboptimal for rapidly growing sequence datasets being generated by next-generation DNA sequencing machines, because they increase in computational complexity quickly with the number of sequences. Results Nephele is a suite of tools that uses the complete composition vector algorithm to represent each sequence in the dataset as a vector derived from its constituent k-mers by passing the need for multiple sequence alignment, and affinity propagation clustering to group the sequences into genotypes based on a distance measure over the vectors. Our methods produce results that correlate well with expert-defined clades or genotypes, at a fraction of the computational cost of traditional phylogenetic methods run on

  1. Use of chronic irradiation in formation of new rape genotypes

    International Nuclear Information System (INIS)

    Fabry, A.; Zukalova, H.; Cerny, J.; Folk, A.


    Chronic irradiation of hybrid plants of F 1 generation obtained by crossing the Canadian rape without erucic acid with European winter varieties containg this acid, doubled the frequency of winter genotypes and increased significantly the frequency of required recombinations of winter character and absence of erucic acid in F 2 -M 2 . Genotypes with a more favourable ratio between linoleic and linolenic acids were obtained in the irradiated F 2 -M 2 population. The obtained radio-induced mutants are used for the production of new varieties of winter rape without erucic acid at the Slapy Breeding Station. (author)

  2. Neuregulin-1 genotypes and eye movements in schizophrenia

    DEFF Research Database (Denmark)

    Haraldsson, H.M.; Ettinger, U.; Magnusdottir, B.B.


    Neuregulin-1 (NRG-1) is a putative susceptibility gene for schizophrenia but the neurocognitive processes that may involve NRG-1 in schizophrenia are unknown. Deficits in antisaccade (AS) and smooth pursuit eye movements (SPEM) are promising endophenotypes, which may be associated with brain...... dysfunctions underlying the pathophysiology of schizophrenia. The aim of this study was to investigate the associations of NRG-1 genotypes with AS and SPEM in schizophrenia patients and healthy controls. Patients (N = 113) and controls (N = 106) were genotyped for two NRG-1 single nucleotide polymorphisms...... findings of impaired AS and SPEM performance in schizophrenia patients (all P

  3. Two-temperature LATE-PCR endpoint genotyping

    Directory of Open Access Journals (Sweden)

    Reis Arthur H


    Full Text Available Abstract Background In conventional PCR, total amplicon yield becomes independent of starting template number as amplification reaches plateau and varies significantly among replicate reactions. This paper describes a strategy for reconfiguring PCR so that the signal intensity of a single fluorescent detection probe after PCR thermal cycling reflects genomic composition. The resulting method corrects for product yield variations among replicate amplification reactions, permits resolution of homozygous and heterozygous genotypes based on endpoint fluorescence signal intensities, and readily identifies imbalanced allele ratios equivalent to those arising from gene/chromosomal duplications. Furthermore, the use of only a single colored probe for genotyping enhances the multiplex detection capacity of the assay. Results Two-Temperature LATE-PCR endpoint genotyping combines Linear-After-The-Exponential (LATE-PCR (an advanced form of asymmetric PCR that efficiently generates single-stranded DNA and mismatch-tolerant probes capable of detecting allele-specific targets at high temperature and total single-stranded amplicons at a lower temperature in the same reaction. The method is demonstrated here for genotyping single-nucleotide alleles of the human HEXA gene responsible for Tay-Sachs disease and for genotyping SNP alleles near the human p53 tumor suppressor gene. In each case, the final probe signals were normalized against total single-stranded DNA generated in the same reaction. Normalization reduces the coefficient of variation among replicates from 17.22% to as little as 2.78% and permits endpoint genotyping with >99.7% accuracy. These assays are robust because they are consistent over a wide range of input DNA concentrations and give the same results regardless of how many cycles of linear amplification have elapsed. The method is also sufficiently powerful to distinguish between samples with a 1:1 ratio of two alleles from samples comprised of

  4. Effects of mannose-binding lectin polymorphisms on irinotecan-induced febrile neutropenia

    NARCIS (Netherlands)

    J.M. van der Bol (Jessica); M.J.A. de Jonge (Maja); R.H.N. van Schaik (Ron); A. Sparreboom (Alex); M.A. van Fessem (Marianne); F.E. Geijn (Fleur); P.L.A. van Daele (Paul); J. Verweij (Jaap); S. Sleijfer (Stefan); A.H.J. Mathijssen (Ron)


    textabstractObjective. Mannose-binding lectin (MBL) is important in the innate immune response. MBL2 gene polymorphisms affect MBL expression, and genotypes yielding low MBL levels have been associated with an elevated risk for infections in hematological cancer patients undergoing chemotherapy.

  5. Low serum mannose-binding lectin level increases the risk of death due to pneumococcal infection

    DEFF Research Database (Denmark)

    Eisen, Damon P; Dean, Melinda M; Boermeester, Marja A


    BACKGROUND: Previous studies have shown associations between low mannose-binding lectin (MBL) level or variant MBL2 genotype and sepsis susceptibility. However, MBL deficiency has not been rigorously defined, and associations with sepsis outcomes have not been subjected to multivariable analysis....

  6. Evaluation of some Phenological and Pomological Characteristics of Selected Walnut Genotypes from Shahroud-Iran

    Directory of Open Access Journals (Sweden)

    Sara Akhiani


    Full Text Available The first step in walnut breeding programs is to identify and evaluate superior genotypes of fruit trees. Hence, there are various walnut breeding programs in various areas of Iran. A study aimed to evaluate the morphological and chemical characteristics of selected superior genotypes of walnut was conducted in the Shahroud region in 2011-2012.  The following genotypes were selected in this study as the best walnut genotypes:  X-18 homogamous genotypes due to desirable late leafing;   genotype X-11 for its high percentage of kernel production, easily removal of shell, thin shell; genotype X-52 due to its kernel plumpness compared to other genotypes, thin shell and high percentage of kernel and genotype X-70 for its kernel brightness, easily kernel extracting and high percentage of kernels. The X-49 and X-5 genotypes had the highest amount of linoleic and linolenic fatty acids and higher nutritional quality compared to other genotypes. Three genotypes, X-3, X-11 and X-22, had the highest amount of oil. Genotypes X-9 and X-45 had the highest amount of protein. The difference between oil content and fatty acid compositions was presumably due to genetic diversity and ecological conditions of the studied genotypes cultivation.

  7. Experimental evidence for competitive growth advantage of genotype VII over VI: implications for foot-and-mouth disease virus serotype A genotype turnover in nature. (United States)

    Mohapatra, J K; Subramaniam, S; Singh, N K; Sanyal, A; Pattnaik, B


    In India, systematic genotype replacement has been observed for serotype A foot-and-mouth disease virus. After a decade of co-circulation of genotypes VI and VII, genotype VII emerged as the single dominant genotype since 2001. To derive possible explanations for such epochal evolution dynamics, in vitro intergenotype growth competition experiments involving both co- and superinfection regimes were conducted. Coinfection of BHK-21 cells demonstrated abrupt loss in the genotype VI viral load with commensurate increase in the load of genotype VII as measured by the genotype differentiating ELISA, RT-PCR and real-time RT-PCR. The superinfection dynamics was shaped by temporal spacing of infection, where the invading genotype VII took more number of passages than coinfection to eventually overtake the resident genotype VI. It was speculated that such superior replicative fitness of genotype VII could have been a possible factor for the ultimate dominance of genotype VII in nature. Copyright © 2011 Elsevier Ltd. All rights reserved.

  8. Establishment of a novel two-probe real-time PCR for simultaneously quantification of hepatitis B virus DNA and distinguishing genotype B from non-B genotypes. (United States)

    Wang, Wei; Liang, Hongpin; Zeng, Yongbin; Lin, Jinpiao; Liu, Can; Jiang, Ling; Yang, Bin; Ou, Qishui


    Establishment of a simple, rapid and economical method for quantification and genotyping of hepatitis B virus (HBV) is of great importance for clinical diagnosis and treatment of chronic hepatitis B patients. We hereby aim to develop a novel two-probe real-time PCR for simultaneous quantification of HBV viral concentration and distinguishing genotype B from non-B genotypes. Conserved primers and TaqMan probes for genotype B and non-B genotypes were designed. The linear range, detection sensitivity, specificity and repeatability of the method were assessed. 539 serum samples from HBV-infected patients were assayed, and the results were compared with commercial HBV quantification and HBV genotyping kits. The detection sensitivity of the two-probe real-time PCR was 500IU/ml; the linear range was 10(3)-10(9)IU/ml, and the intra-assay CVs and inter-assay CVs were between 0.84% and 2.80%. No cross-reaction was observed between genotypes B and non-B. Of the 539 detected samples, 509 samples were HBV DNA positive. The results showed that 54.0% (275/509) of the samples were genotype B, 39.5% (201/509) were genotype non-B and 6.5% (33/509) were mixed genotype. The coincidence rate between the method and a commercial HBV DNA genotyping kit was 95.9% (488/509, kappa=0.923, PDNA qPCR kit were achieved. A novel two-probe real-time PCR method for simultaneous quantification of HBV viral concentration and distinguishing genotype B from non-B genotypes was established. The assay was sensitive, specific and reproducible which can be applied to areas prevalent with HBV genotypes B and C, especially in China. Copyright © 2014 Elsevier B.V. All rights reserved.

  9. Development of a monoclonal antibody against viral haemorrhagic septicaemia virus (VHSV) genotype IVa

    DEFF Research Database (Denmark)

    Ito, T.; Olesen, Niels Jørgen; Skall, Helle Frank


    of the spread of genotypes to new geographical areas. A monoclonal antibody (MAb) against VHSV genotype IVa was produced, with the aim of providing a simple method of discriminating this genotype from the other VHSV genotypes (I, II, III and IVb). Balb/c mice were injected with purified VHSV-JF00Ehil (genotype...... IVa) from diseased farmed Japanese flounder. Ten hybridoma clones secreting monoclonal antibodies (MAbs) against VHSV were established. One of these, MAb VHS-10, reacted only with genotype IVa in indirect fluorescent antibody technique (IFAT) and ELISA. Using cell cultures that were transfected...

  10. Physiological response of soybean genotypes to plant density

    NARCIS (Netherlands)

    Gan, Y; Stulen, [No Value; van Keulen, H; Kuiper, PJC


    Response of soybean (Glycine max (L.) Merr.) to plant density has occupied a segment of agronomic research for most of the century. Genotype differences have been noted especially in response to planting date, lodging problems and water limitation. There is limited information on the physiological

  11. Interactions of genotype, housing and dietary calcium in layer ...

    African Journals Online (AJOL)

    The study was designed to evaluate the interactions in performance, eggshell quality and tibia traits of two laying hen genotypes, namely a commercial hybrid, Lohmann (LSL), and a traditional breed, the Czech Hen (CH), housed in conventional cages and on litter, and fed two levels of dietary calcium (Ca) (3.5% vs. 3.0%).

  12. Effect of genotype on haematology and biochemical parameters of ...

    African Journals Online (AJOL)

    Frizzle n = 33, Naked neck, n= 33 and Normal n = 33) were generated from 36 matured local chickens and used for the study to determine the effect of genotype on hematological and biochemical parameters of local chicken in the humid ...

  13. Effect of chicken genotype on growth performance and feed ...

    African Journals Online (AJOL)

    This experiment was conducted to assess the effect of chicken genotype on the growth performance, feed intake and feed efficiency of the progenies resulting from pure, straight and reciprocal cross of Giriraja (Gr) and Alpha chickens. Data obtained on body weight, body length, breast girth, keel length, feed intake and feed ...

  14. Response of Tomato Genotypes to Induced Salt Stress | Agong ...

    African Journals Online (AJOL)

    Thirteen tomato (Lycopersicon esculentum L.) genotypes were subjected to salt treatment under hydroponics and their responses monitored in a set of two experiments with the objective of advancing them as potential salt tolerant tomato scion and/or rootstocks. Salt applications ranged from 0 to 2% NaCl, with the resultant ...

  15. Nutrient composition of strawberry genotypes cultivated in a horticulture farm. (United States)

    Hossain, Ashrafi; Begum, Parveen; Salma Zannat, M; Hafizur Rahman, Md; Ahsan, Monira; Islam, Sheikh Nazrul


    This article decribes the nutrient composition of four strawberry genotypes cultivated at the Sher-e-Bangla Agriculture University horticulture farm in Dhaka (Bangladesh). AOAC and standard validated methods were employed to analyse the nutrient composition. Protein, fat and ash contents were found to be vary significantly (LSD<0.05), while the variation in moisture (LSD<1.33), dietary fibre (LSD<0.15) and total sugar (LSD<0.09) were found to be insignificant among the genotypes. Vitamin C content ranged from 26.46 mg to 37.77 mg per 100g edible strawberries (LSD<0.060). Amount of carotenoids were found to be very low being in a range of 0.99-3.30 μg per 100g edible fruit. Analysis of mineral revealed that strawberry genotypes contained a wide array of minerals including Ca, Mg, Na, K, P, Mn, Zn, Cu and Fe; most of which varied significantly (LSD<0.05) among the genotypes. Strawberries could be a potential dietary supplement for vitamin C along with minerals, particularly for the children who do not like local fruits, but love to eat the colourful strawberries. Copyright © 2015 Elsevier Ltd. All rights reserved.

  16. Haemoglobin genotype of children with severe malaria seen at the ...

    African Journals Online (AJOL)

    Prof Ezechukwu


    Oct 23, 2011 ... malaria seen in University of Benin. Teaching Hospital (UBTH), Benin. City. Patients and methods: ... gested to play crucial role in the defense of host against malaria infection and reduce susceptibility to severe .... Binary logistic regression model using Hb genotype status (abnormal Hb versus HbAA) as the ...

  17. The influence of root rot incidence on cassava genotype on ...

    African Journals Online (AJOL)

    In Nigeria cassava root rot causes serious yield losses in cassava tuber production every year. However, the influence of root rot incidence on cassava genotype at harvest on consumers' acceptability of the gari produced from it has not been studied. A sensory evaluation was conducted on gari processed from the tuberous ...

  18. Response of cowpea genotypes to Alectra vogelii parasitism in Kenya

    African Journals Online (AJOL)

    This information showed that there is sufficient genetic variability in the cowpea genotypes studied, which can be exploited in breeding improved cowpea varieties for resistance to A. vogelii in Kenya. A great progress towards developing improved cowpea variety that meets farmer's preferences with durable resistance to A.

  19. Prevalence of heamoglobin genotype screening and awareness of ...

    African Journals Online (AJOL)

    Slightly more than half of the respondents (53.0%) had normal haemoglobin ... only a quarter (28.2%) of them had ever done their genotype test prior to the study. ... married, parental educational background and being in science-related field.

  20. Large SNP arrays for genotyping in crop plants

    Indian Academy of Sciences (India)

    Genotyping with large numbers of molecular markers is now an indispensable tool within plant genetics and breeding. Especially through the identification of large numbers of single nucleotide polymorphism (SNP) markers using the novel high-throughput sequencing technologies, it is now possible to reliably identify many ...

  1. Spikelet sterility in rice genotypes affected by temperature at microsporogenesis

    Directory of Open Access Journals (Sweden)

    Natalia M. de Souza

    Full Text Available ABSTRACT This study evaluated the effect of temperatures during the phase of microsporogenesis on spikelet sterility of paddy rice and identified genotypes tolerant to low temperatures at this growth stage. The inbreds SC681, SC491, and SC676 and the cultivars Epagri 109 and SCS116 Satoru were assessed. The genotypes were submitted for three days in a growth chamber to five temperatures at microsporogenesis: 9, 12, 15, 18, and 21 oC. For each tested temperature, a control was kept in the greenhouse under environmental conditions. After harvest, full and empty spikelets were counted and weighed and the percentage of spikelet sterility was determined. Data were evaluated by variance analysis using the F test. Averages were compared by Tukey’s test and regression analysis. The highest spikelet sterilities were observed when the genotypes were exposed to the temperatures of 9 and 12 oC. Genotype spikelet sterility was similar to that of the control at 21 ºC. The inbred SC 676 presented higher tolerance to lower temperatures is therefore potentially suited to generate a cultivar with adequate agronomic performance in rice growing areas prone to cold conditions at microsporogenesis.

  2. Human rotavirus genotypes causing acute watery diarrhea among ...

    African Journals Online (AJOL)

    Background: Diarrhea is a major cause of childhood morbidity and mortality in the developing countries. Rotavirus is a major cause of acute watery diarrhea. Aim: This study aims at characterizing the prevalent rotavirus G-genotypes among under.five children presenting with acute watery diarrhea in Benin City, Nigeria.

  3. DNA landmarks for genetic diversity assessment in tea genotypes ...

    African Journals Online (AJOL)

    Tea (Camellia sinensis) is one of the most important non-alcoholic beverages of the world. Natural genetic diversity in tea has been reduced due to continue selection in favor of desirable traits. The present study was conducted to estimate genetic diversity in tea genotypes cultivated in Pakistan using 20 randomly amplified ...

  4. growth and yield parameters of sorghum genotypes as affected

    African Journals Online (AJOL)


    ABSTRACT. Field trial was conducted at Bayero University, Kano research farm with the aim of determining the effect of stem injection artificial inoculation technique on the growth and yield parameters of one hundred and four sorghum genotypes against head smut. The trial was laid on a randomized complete block design ...

  5. Hepatitis E Virus Genotype 4 Outbreak, Italy, 2011 (United States)

    Garbuglia, Anna R.; Scognamiglio, Paola; Petrosillo, Nicola; Mastroianni, Claudio Maria; Sordillo, Pasquale; Gentile, Daniele; La Scala, Patrizia; Girardi, Enrico


    During 2011, 5 persons in the area of Lazio, Italy were infected with a monophyletic strain of hepatitis E virus that showed high sequence homology with isolates from swine in China. Detection of this genotype in Italy parallels findings in other countries in Europe, signaling the possible spread of strains new to Western countries. PMID:23260079

  6. Pollen diversity, viability and floral structure of some Musa genotypes

    African Journals Online (AJOL)

    Prof. Ogunji

    This is related to sterility due to triploidy, variation in genome size and structure ... Pollen grains are structures that house the male gametophytes generation of .... the mean value for all the genotypes was recorded for PITA 14, an 11TA hybrid.

  7. Potential of biofertilisers to improve performance of local genotype tomatoes

    Directory of Open Access Journals (Sweden)

    Carmen Puia


    Full Text Available Complex microbial communities in the plant rhizosphere are responsible for their success in ecosystems. Supplementary inoculation of soil with mycorrhizal fungi and rhizospheric bacteria may act as a plant growth-promoting factor. The present study aims to assess the potential use of biofertilisers on tomato as a way of increasing yield and stability of root exploration area. The experiment was set up in greenhouse, regarding the evaluation of growing dynamics of plants, mycorrhization level and obtained yield. The identification of effective inoculation variants can lead to a standardisation of technologies of growing for local plant genotypes. Data analysis was performed based on the ANOVA test, followed by Tukey HSD, principal component analysis and cluster analysis in order to identify the potential of bioproducts to stimulate the development of tomato plants. Application of bacterial biofertilisers does not stimulate enough the aboveground development of plants. An antagonistic reaction is visible between exogenous mycorrhizas and those specific in soil, acting slightly different for each genotype. Mycorrhizal level in root systems is more dependent on applied biofertilisers than on analyzed genotypes. For the variants without additional fertilisers, a high level of mycorrhization is visible only after 75 days from the transplantation. Based on results we can conclude that microbial active fertilisers may represent viable solutions to increase yield capacity and root exploration area for local tomato genotypes.

  8. `Assessment of Hybrid White Yam (Discorea Rotundata) Genotypes ...

    African Journals Online (AJOL)

    Ako-Isu had black colour while the remaining amala samples had varying shades of grey colouration. Though all the elubo samples from the experimental yam genotypes were found to be usable in amala preparation, only the amala sample made from TDr 89/02677 compared favourably (especially in the handfeel sensory ...

  9. Prevalence and genotypes of Enterocytozoon bieneusi in China. (United States)

    Wang, Sha-Sha; Wang, Rong-Jun; Fan, Xian-Cheng; Liu, Ting-Li; Zhang, Long-Xian; Zhao, Guang-Hui


    Enterocytozoon bieneusi has been considered as the most frequently diagnosed microsporidian species in humans and various animal species, accounting for more than 90% of the cases of human microsporidiosis. Spores of this pathogen excreted from both symptomatic and asymptomatic hosts into environment also would be an important source of waterborne outbreak of microsporidiosis. Due to limited effective drugs available but with too much side effects to mammals (eg. toxic), accurate characterization of E. bieneusi in both humans and animals is essential to implement effective control strategies to this pathogen. In China, E. bieneusi infection was presented in humans and some animals with high prevalence. Analysis of genetic variations of the internal transcribed spacer (ITS) sequences found 361 genotypes in China, and some novel genotypes were identified in some specific hosts. Additionally, associations between infections and some risk factors were also observed. In the present article, we reviewed the current status of prevalence, genotypes, multilocus genotypes (MLGs) in humans, various animals and waters in China. These findings will provide basic information for developing effective control strategies against E. bieneusi infection in China as well as other countries. Copyright © 2018 Elsevier B.V. All rights reserved.

  10. Interaction between genotype and climates for Holstein milk ...

    African Journals Online (AJOL)

    This study was designed to investigate the interaction between genotype and climate for milk and fat production traits of Iranian Holstein dairy herds. Milk and fat production data were grouped in 5 climates, on the basis of Extended De Martonne method. (Co)Variance components and genetic parameters of first lactation ...

  11. Partitioning of copy-number genotypes in pedigrees

    Directory of Open Access Journals (Sweden)

    Andelfinger Gregor U


    Full Text Available Abstract Background Copy number variations (CNVs and polymorphisms (CNPs have only recently gained the genetic community's attention. Conservative estimates have shown that CNVs and CNPs might affect more than 10% of the genome and that they may be at least as important as single nucleotide polymorphisms in assessing human variability. Widely used tools for CNP analysis have been implemented in Birdsuite and PLINK for the purpose of conducting genetic association studies based on the unpartitioned total number of CNP copies provided by the intensities from Affymetrix's Genome-Wide Human SNP Array. Here, we are interested in partitioning copy number variations and polymorphisms in extended pedigrees for the purpose of linkage analysis on familial data. Results We have developed CNGen, a new software for the partitioning of copy number polymorphism using the integrated genotypes from Birdsuite with the Affymetrix platform. The algorithm applied to familial trios or extended pedigrees can produce partitioned copy number genotypes with distinct parental alleles. We have validated the algorithm using simulations on a complex pedigree structure using frequencies calculated from a real dataset of 300 genotyped samples from 42 pedigrees segregating a congenital heart defect phenotype. Conclusions CNGen is the first published software for the partitioning of copy number genotypes in pedigrees, making possible the use CNPs and CNVs for linkage analysis. It was implemented with the Python interpreter version 2.5.2. It was successfully tested on current Linux, Windows and Mac OS workstations.

  12. Comparative Effects of Cowpea and Soybean Genotypes on N2 ...

    African Journals Online (AJOL)


    ABSTRACT:A field trial was conducted to asses N2 - fixation and N balance in five cultivars each of soybean (TGX 1945 – 1F, ... Key words: Legume genotype, N2 fixation, N balance and Nitrogen Harvest Index (NHI) ..... subsequent maize grain yield in the guinea savanna ... On-farm evaluation of biological nitrogen fixation.

  13. β-Carotene content of selected banana genotypes from Uganda

    African Journals Online (AJOL)

    carotene with values as high as 2594.0 μg/100 g edible pulp. A positive correlation existed between pulp color intensity and β-carotene concentration. Accessions with relatively high levels of β-carotene,especially the PNG genotypes, could be ...

  14. A simple and robust approach for genotyping in Musaceae

    Czech Academy of Sciences Publication Activity Database

    Hřibová, Eva; Christelová, Pavla; Roux, N.; Doležel, Jaroslav


    Roč. 986, April 2013 (2013), s. 241-246 ISSN 0567-7572 Grant - others:GA MŠk(CZ) ED0007/01/01 Program:ED Institutional research plan: CEZ:AV0Z50380511 Keywords : fragment analysis * genotyping platform * microsatellite markers Subject RIV: EB - Genetics ; Molecular Biology

  15. Genetic diversity among some productive genotypes of tomato ...

    African Journals Online (AJOL)



    Jun 3, 2015 ... weight, cluster VIII had highest number of locules per fruit, fruit yield per plant and yield per hectare and cluster XVII was .... Cluster means for yield and quality contributing characters of 60 genotypes of tomato. Cluster lycopene β- ..... Sharma JP, Singh AK, Satesh K, Sanjeev K. (2009). Identification of.

  16. Infection of hepatitis C virus genotypes in hepatocellular carcinoma ...

    African Journals Online (AJOL)

    The aim of this retrospective study was to investigate the infection of hepatitis C virus (HCV) genotypes in hepatocellular carcinoma (HCC) patients from rural areas of Faisalabad region. Among 179 HCC subjects, men and women were 51 and 49%, respectively. All samples positive for HCV RNA by qualitative PCR were ...

  17. Childhood Pompe disease: clinical spectrum and genotype in 31 patients

    NARCIS (Netherlands)

    Capelle, C.I. van; Meijden, J.C. van der; Hout, J.M. van den; Jaeken, J.; Baethmann, M.; Voit, T.; Kroos, M.A.; Derks, T.G.; Rubio-Gozalbo, M.E.; Willemsen, M.A.A.P.; Lachmann, R.H.; Mengel, E.; Michelakakis, H.; Jongste, J.C. de; Reuser, A.J.; Ploeg, A.T. van der


    BACKGROUND: As little information is available on children with non-classic presentations of Pompe disease, we wished to gain knowledge of specific clinical characteristics and genotypes. We included all patients younger than 18 years, who had been evaluated at the Pompe Center in Rotterdam, the

  18. Childhood Pompe disease: Clinical spectrum and genotype in 31 patients

    NARCIS (Netherlands)

    C.I. van Capelle (Carine); J.C. van der Meijden (Chris); J.M.P. van den Hout (Johanna); J. Jaeken; M. Baethmann; T. Voit; M.A. Kroos (Marian); T.G.J. Derks (Terry G J); M.E. Rubio-Gozalbo (Estela); M.A. Willemsen (Michél); R. Lachmann (Robin); E. Mengel; H. Michelakakis (Helen); J.C. de Jongste (Johan); A.J.J. Reuser (Arnold); A.T. van der Ploeg (Ans)


    textabstractBackground: As little information is available on children with non-classic presentations of Pompe disease, we wished to gain knowledge of specific clinical characteristics and genotypes. We included all patients younger than 18 years, who had been evaluated at the Pompe Center in

  19. Childhood Pompe disease : clinical spectrum and genotype in 31 patients

    NARCIS (Netherlands)

    van Capelle, C I; van der Meijden, J C; van den Hout, J M P; Jaeken, J; Baethmann, M; Voit, T; Kroos, M A; Derks, T G J; Rubio-Gozalbo, M E; Willemsen, M A; Lachmann, R H; Mengel, E; Michelakakis, H; de Jongste, J C; Reuser, A J J; van der Ploeg, A T


    Background: As little information is available on children with non-classic presentations of Pompe disease, we wished to gain knowledge of specific clinical characteristics and genotypes. We included all patients younger than 18 years, who had been evaluated at the Pompe Center in Rotterdam, the

  20. Synthetic microbial ecology and the dynamic interplay between microbial genotypes. (United States)

    Dolinšek, Jan; Goldschmidt, Felix; Johnson, David R


    Assemblages of microbial genotypes growing together can display surprisingly complex and unexpected dynamics and result in community-level functions and behaviors that are not readily expected from analyzing each genotype in isolation. This complexity has, at least in part, inspired a discipline of synthetic microbial ecology. Synthetic microbial ecology focuses on designing, building and analyzing the dynamic behavior of ‘ecological circuits’ (i.e. a set of interacting microbial genotypes) and understanding how community-level properties emerge as a consequence of those interactions. In this review, we discuss typical objectives of synthetic microbial ecology and the main advantages and rationales of using synthetic microbial assemblages. We then summarize recent findings of current synthetic microbial ecology investigations. In particular, we focus on the causes and consequences of the interplay between different microbial genotypes and illustrate how simple interactions can create complex dynamics and promote unexpected community-level properties. We finally propose that distinguishing between active and passive interactions and accounting for the pervasiveness of competition can improve existing frameworks for designing and predicting the dynamics of microbial assemblages.

  1. Marker assisted characterization of chickpea genotypes for wilt ...

    African Journals Online (AJOL)

    Further, the sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS PAGE) analysis of seed storage protein showed a difference in protein profile among studied genotypes but none of polypeptide fragment was specific to wilt resistance or susceptibility. In present study, the reported markers linked to susceptibility ...

  2. Tamarix (Tamaricaceae) hybrids: most dominant invasive genotype in southern Africa (United States)

    Hybridization can potentially enhance invasiveness. Tamarix (Tamaricaceae) hybrids appear to be the dominant genotypes in their invasions. Exotic Tamarix are declared invasive in South Africa and the exotic T. chinensis and T. ramosissima are known to hybridize between themselves, and with the nativ...

  3. Root response of Jerusalem artichoke genotypes to different water regimes (United States)

    The objective of this study was to determine effects of drought on selected root growth parameters and develop relationships between root parameters and tuber yield for selected Jerusalem artichoke (JA) genotypes. Three water regimes (Field capacity, 50% available water (AW) and 25% AW) and five JA...

  4. Interaction in Short rotation coppice willow, Salix viminalis genotype mixtures

    Energy Technology Data Exchange (ETDEWEB)

    Begley, D. [Department of Biological Sciences, Queen' s University Belfast, Newforge Lane, Belfast BT9 5PX, Northern Ireland (United Kingdom); McCracken, A.R. [Applied Plant Science and Biometrics Division, Agri-Food and Biosciences Institute, 18A Newforge Lane, Belfast BT9 5PX, Northern Ireland (United Kingdom)]|[Northern Ireland Horticulture and Plant Breeding Station, Applied Plant Science and Biometrics Division, Agri-Food and Biosciences Institute, Loughgall, Co., Armagh BT61 8JB, Northern Ireland (United Kingdom); Dawson, W.M. [Northern Ireland Horticulture and Plant Breeding Station, Applied Plant Science and Biometrics Division, Agri-Food and Biosciences Institute, Loughgall, Co., Armagh BT61 8JB, Northern Ireland (United Kingdom); Watson, S. [Applied Plant Science and Biometrics Division, Agri-Food and Biosciences Institute, 18A Newforge Lane, Belfast BT9 5PX, Northern Ireland (United Kingdom)


    Seven straight Salix viminalis genotypes with different levels of rust (Melampsora epitea) susceptibility were grown as mono-plots as well as being incorporated into a range of mixtures. Two 3-year harvests (2003 and 2006) were taken. Disease progress was followed on each of the individual genotypes throughout each growing season 2001-2006. In 2003 there were small but significant yield increases from the mixtures compared to the yield of individual components grown as mono-plots. These differences were not evident at the second harvest in 2006. No consistent effect of mixtures on reducing rust on the most susceptible genotype, Salix viminalis '77082' were observed. In some years, e.g. 2003, at certain times during the growing season, significant reductions were observed on Salix viminalis '77082' in certain 3-way mixtures compared to mono-plots. These, however, were not repeated consistently in subsequent years. It was concluded that the current commercial practice in many parts of Europe of planting mixtures as a disease control strategy will only be effective if there is sufficient genetic diversity between the Salix genotypes incorporated into the mixture. (author)

  5. Differential responses of 15 cowpea genotypes to three Striga hot ...

    African Journals Online (AJOL)

    Differential responses of 15 cowpea genotypes to three Striga hot spots in Niger. M. SALIFOU1*, J. B. L. S. TIGNEGRE2, P. TONGOONA3, S. OFFEI3,. K. OFORI3 and E. DANQUAH3. 1National Agricultural Research Institute of Niger, Maradi Regional Research Centre, Niger. 2 The world Vegetable Centre, West and Central ...

  6. Early-onset stargardt disease: phenotypic and genotypic characteristics

    NARCIS (Netherlands)

    Lambertus, S.; Huet, R.A.C. van; Bax, N.M.; Hoefsloot, L.H.; Cremers, F.P.M.; Boon, C.J.F.; Klevering, B.J.; Hoyng, C.B.


    OBJECTIVE: To describe the phenotype and genotype of patients with early-onset Stargardt disease. DESIGN: Retrospective cohort study. PARTICIPANTS: Fifty-one Stargardt patients with age at onset

  7. Tissue Fractions of Cadmium in Two Hyperaccumulating Jerusalem Artichoke Genotypes

    Directory of Open Access Journals (Sweden)

    Xiaohua Long


    Full Text Available In order to investigate the mechanisms in two Jerusalem artichoke (Helianthus tuberosus L. genotypes that hyperaccumulate Cd, a sand-culture experiment was carried out to characterize fractionation of Cd in tissue of Cd-hyperaccumulating genotypes NY2 and NY5. The sequential extractants were: 80% v/v ethanol (FE, deionized water (FW, 1 M NaCl (FNaCl, 2% v/v acetic acid (FAcet, and 0.6 M HCl (FHCl. After 20 days of treatments, NY5 had greater plant biomass and greater Cd accumulation in tissues than NY2. In both genotypes the FNaCl fraction was the highest in roots and stems, whereas the FAcet and FHCl fractions were the highest in leaves. With an increase in Cd concentration in the culture solution, the content of every Cd fraction also increased. The FW and FNaCl ratios in roots were lower in NY5 than in NY2, while the amount of other Cd forms was higher. It implied that, in high accumulator, namely, NY5, the complex of insoluble phosphate tends to be shaped more easily which was much better for Cd accumulation. Besides, translocation from plasma to vacuole after combination with protein may be one of the main mechanisms in Cd-accumulator Jerusalem artichoke genotypes.

  8. Genotype-by-environment interaction and grain yield stability of ...

    African Journals Online (AJOL)

    The objective of this paper is to identify stable and high yielding varieties among 20 Ethiopian Bread wheat (Triticum aestivum L.) genotypes on the basis of experiments conducted during the 2007 and 2008 growing seasons. The additive main effects and multiplicative interaction (ammi) model has been used to estimate ...

  9. Evaluation of bread wheat genotypes for salinity tolerance under ...

    African Journals Online (AJOL)

    In two consecutive seasons (2007-08 and 2008-09), field experiments were conducted at Soil Salinity Research Institute, Pindi Bhattian and Biosaline Agricultural Research Station, Pakka Aana, Pakistan. During 2007-08, 103 wheat landrace genotypes were evaluated for salinity tolerance. During 2008-09, 47 selected ...

  10. Approaches to genotyping individual miracidia of Schistosoma japonicum. (United States)

    Xiao, Ning; Remais, Justin V; Brindley, Paul J; Qiu, Dong-Chuan; Carlton, Elizabeth J; Li, Rong-Zhi; Lei, Yang; Blair, David


    Molecular genetic tools are needed to address questions as to the source and dynamics of transmission of the human blood fluke Schistosoma japonicum in regions where human infections have reemerged, and to characterize infrapopulations in individual hosts. The life stage that interests us as a target for collecting genotypic data is the miracidium, a very small larval stage that consequently yields very little DNA for analysis. Here, we report the successful development of a multiplex format permitting genotyping of 17 microsatellite loci in four sequential multiplex reactions using a single miracidium held on a Whatman Classic FTA indicating card. This approach was successful after short storage periods, but after long storage (>4 years), considerable difficulty was encountered in multiplex genotyping, necessitating the use of whole genome amplification (WGA) methods. WGA applied to cards stored for long periods of time resulted in sufficient DNA for accurate and repeatable genotyping. Trials and tests of these methods, as well as application to some field-collected samples, are reported, along with the discussion of the potential insights to be gained from such techniques. These include recognition of sibships among miracidia from a single host, and inference of the minimum number of worm pairs that might be present in a host.

  11. cultivars and identification of genotype-specific fingerprints using ...

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Genetics; Volume 89; Online resources. Diversity in Indian barley (Hordeum vulgare) cultivars and identification of genotype-specific fingerprints using microsatellite markers. S. K. Jaiswal Shree P. Pandey S. Sharma R. Prasad L. C. Prasad R. P. S. Verma Arun K. Joshi. Volume 89 Online ...

  12. Equine cryptosporidial infection associated with Cryptosporidium hedgehog genotype in Algeria

    Czech Academy of Sciences Publication Activity Database

    Laatamna, A.E.; Wágnerová, P.; Sak, Bohumil; Květoňová, Dana; Aissi, M.; Rost, M.; Kváč, Martin


    Roč. 197, 1-2 (2013), s. 350-353 ISSN 0304-4017 Grant - others:GAJU(CZ) 022/2010/Z; GAJU(CZ) 011/2013/Z Institutional support: RVO:60077344 Keywords : horses * Cryptosporidium hedgehog genotype * PCR * SSU * GP60 Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 2.545, year: 2013

  13. Infection of hepatitis C virus genotypes in hepatocellular carcinoma ...

    African Journals Online (AJOL)



    Aug 8, 2011 ... East, Central Africa and Egypt (Higuchi et al., 2002). Genotypes 5 and 6 are ... routes of infection such as history of taking different injections, history of ... catheterization, abscess drainage, esophageal vortices, sclera- therapy ... 10 ml of venous blood was collected from all the study subjects and sera were ...

  14. Hepatitis E Virus Genotype 3 in Humans and Swine, Bolivia (United States)

    Cavallo, Annalisa; Gonzales, José Luis; Bonelli, Sara Irene; Valda, Ybar; Pieri, Angela; Segundo, Higinio; Ibañez, Ramón; Mantella, Antonia; Bartalesi, Filippo; Tolari, Francesco; Bartoloni, Alessandro


    We determined the seroprevalence of hepatitis E virus (HEV) in persons in 2 rural communities in southeastern Bolivia and the presence of HEV in human and swine fecal samples. HEV seroprevalence was 6.3%, and HEV genotype 3 strains with high sequence homology were detected. PMID:21801630

  15. Comparison and suitability of genotype by environment analysis ...

    African Journals Online (AJOL)

    Pearl millet (Pennisetum glaucum (L.) R. Br.) is an important food security and income crop for households living in semi-arid zones in Uganda. However, the genotype by environment interaction, in addition to the several methods used for its assessment, complicates selection of varieties adapted to such semi-arid areas.

  16. detection of the predominant microcystin-producing genotype of ...

    African Journals Online (AJOL)



    Dec 21, 2011 ... genotypes of MC-producing cyanobacteria in Mozambique. Polymerase chain ...... 1(7): 359-366. Pan H, Song L, Liu Y, Börner T (2002). ... Miles CO (2009). A convenient and cost-effective method for monitoring marine algal ...

  17. identification of common bean genotypes with dual leaf and pod ...

    African Journals Online (AJOL)




  18. Numerical and RAPD Analysis of Eight Cowpea Genotypes from ...

    African Journals Online (AJOL)

    Hence, numerical tools such as single linkage cluster analysis (SLCA) and principal component analysis (PCA) have been used to determine the extent of variability. This study was conducted to determine the performance, character contribution as well as variation pattern in eight cowpea genotypes collected in Nigeria.

  19. Genotype and ancestry modulate brain's DAT availability in healthy humans

    International Nuclear Information System (INIS)

    Shumay, E.; Chen, J.; Fowler, J.S.; Volkow, N.D.


    The dopamine transporter (DAT) is a principal regulator of dopaminergic neurotransmission and its gene (the SLC6A3) is a strong biological candidate gene for various behavioral- and neurological disorders. Intense investigation of the link between the SLC6A3 polymorphisms and behavioral phenotypes yielded inconsistent and even contradictory results. Reliance on objective brain phenotype measures, for example, those afforded by brain imaging, might critically improve detection of DAT genotype-phenotype association. Here, we tested the relationship between the DAT brain availability and the SLC6A3 genotypes using an aggregate sample of 95 healthy participants of several imaging studies. These studies employed positron emission tomography (PET) with [ 11 C] cocaine wherein the DAT availability was estimated as Bmax/Kd; while the genotype values were obtained on two repeat polymorphisms - 3-UTR- and intron 8- VNTRs. The main findings are the following: (1) both polymorphisms analyzed as single genetic markers and in combination (haplotype) modulate DAT density in midbrain; (2) ethnic background and age influence the strength of these associations; and (3) age-related changes in DAT availability differ in the 3-UTR and intron8 - genotype groups.

  20. Leaf anatomy of genotypes of banana plant grown under coloured ...

    African Journals Online (AJOL)

    This study aimed to evaluate the effect of spectral light quality on different anatomical features of banana tree plantlets grown under coloured shade nets. Banana plants of five genotypes obtained from micropropagation, were grown under white, blue, red and black nets, with shade of 50%, in a completely randomized ...

  1. Breeding value of primary synthetic wheat genotypes for grain yield (United States)

    To introduce new genetic diversity into the bread wheat gene pool from its progenitor, Aegilops tauschii (Coss.) Schmalh, 33 primary synthetic hexaploid wheat genotypes (SYN) were crossed to 20 spring bread wheat (BW) cultivars at the International Wheat and Maize Improvement Center. Modified single...

  2. Genotype identification and inference of genetic relatedness among ...

    African Journals Online (AJOL)

    Twenty-seven (27) grape genotypes representing different grape groups namely table, wine, juice grapes and rootstocks with present or potential future importance for sub-tropical viticulture were characterized with 29 microsatellite markers spanning over 15 linkage groups of 'Syrah' x 'Grenache' linkage map.

  3. Physiological responses to glyphosate are dependent on Eucalyptus urograndis genotype (United States)

    Two experiments were conducted to evaluate the response of Eucalyptus urograndis genotypes (C219 and GG100) to glyphosate in growth chambers. As glyphosate dose increased (18 up to 720 g ae ha-1), CO2 assimilation rate, transpiration rate, and stomatal conductance decreased fastest and strongest in ...

  4. Genetic diversity of Pakistani maize genotypes using chromosome ...

    African Journals Online (AJOL)

    For improvement of maize crop presence of genetic diversity in the germplasm is very important. This study was conducted to determine genetic diversity among 17 Pakistani maize genotypes using 10 simple sequence repeat (SSR) primer sets. All the amplification products were in the range of <250-750 bp. To estimate the ...

  5. Protein landmarks for diversity assessment in wheat genotypes ...

    African Journals Online (AJOL)

    Grain proteins from 20 Indian wheat genotypes were evaluated for diversity assessment based seed storage protein profiling on sodium dodecylsulphate polyacrylamide gel electrophoresis (SDS-PAGE). Genetic diversity was evaluated using Nei's index, Shannon index and Unweighted pair group method with arithmetic ...

  6. MLVA genotyping of human Brucella isolates from Peru

    NARCIS (Netherlands)

    Smits, Henk L.; Espinosa, Benjamin; Castillo, Rosa; Hall, Eric; Guillen, Alfredo; Zevaleta, Milagros; Gilman, Robert H.; Melendez, Paolo; Guerra, Carlos; Draeger, Angelika; Broglia, Alessandro; Nöckler, Karsten


    Recent human Brucella melitensis isolates from Peru were genotyped by multiple locus variable number repeat analysis. All 24 isolates originated from hospitalized patients living in the central part of Peru and consisted of six genomic groups comprising two to four isolates and nine unique

  7. Effect of Temperature and Hose Genotype on Components of ...

    African Journals Online (AJOL)

    Effect of Temperature and Hose Genotype on Components of Resistance to Groundnut Rust. P Subrahmanyam, PV Subba Rao, PM Reddy, D McDonald. Abstract. The effects of temperature on incubation period, infection frequency, lesion diameter, leaf area damage, pustule rupture, and sporulation were quantified for six ...

  8. Responses of some selected Malaysian rice genotypes to callus ...

    African Journals Online (AJOL)



    Jan 17, 2011 ... embryogenic callus culture (Yin et al., 1993). In this study, overall, the callus from the MS medium had a good texture. Furthermore, some genotypes also produced better callus in other concentrations of 2,4-D treatment, however, the quality of callus was not as good as those in. 10 µM 2,4-D. Notably, the ...

  9. Coral host transcriptomic states are correlated with Symbiodinium genotypes

    KAUST Repository

    DeSalvo, Michael K.


    A mutualistic relationship between reef-building corals and endosymbiotic dinoflagellates (Symbiodinium spp.) forms the basis for the existence of coral reefs. Genotyping tools for Symbiodinium spp. have added a new level of complexity to studies concerning cnidarian growth, nutrient acquisition, and stress. For example, the response of the coral holobiont to thermal stress is connected to the host-Symbiodinium genotypic combination, as different partnerships can have different bleaching susceptibilities. In this study, we monitored Symbiodinium physiological parameters and profiled the coral host transcriptional responses in acclimated, thermally stressed, and recovered fragments of the coral Montastraea faveolata using a custom cDNA gene expression microarray. Interestingly, gene expression was more similar among samples with the same Symbiodinium content rather than the same experimental condition. In order to discount for host-genotypic effects, we sampled fragments from a single colony of M. faveolata containing different symbiont types, and found that the host transcriptomic states grouped according to Symbiodinium genotype rather than thermal stress. As the first study that links coral host transcriptomic patterns to the clade content of their Symbiodinium community, our results provide a critical step to elucidating the molecular basis of the apparent variability seen among different coral-Symbiodinium partnerships. © 2010 Blackwell Publishing Ltd.

  10. Geographical parthenogenesis: General purpose genotypes and frozen niche variation

    DEFF Research Database (Denmark)

    Vrijenhoek, Robert C.; Parker, Dave


    hypotheses concerning the evolution of niche breadth in asexual species - the "general-purpose genotype" (GPG) and "frozen niche-variation" (FNV) models. The two models are often portrayed as mutually exclusive, respectively viewing clonal lineages as generalists versus specialists. Nonetheless...

  11. Peptostreptococcus micros smooth and rough genotypes in periodontitis and gingivitis

    NARCIS (Netherlands)

    Kremer, BHA; Loos, BG; van der Velden, U; van Winkelhoff, AJ; Craandijk, J; Bulthuis, HM; Hutter, J; Varoufaki, AS; van Steenbergen, TJM

    Background: Two genotypes can be distinguished within the species Peptostreptococcus micros: a smooth (Sm) and a rough (Rg) type. To date no systematic study has been performed on the prevalence and proportion of both types in untreated periodontitis patients and subjects without destructive

  12. Field reaction of cassava genotypes to anthracnose, bacterial blight ...

    African Journals Online (AJOL)

    Field reaction of cassava genotypes to anthracnose, bacterial blight, cassava mosaic disease and their effects on yield. ... The BYDV-PAV and BYDV-RPV serotypes were identified from 9 and 10 of the 11 surveyed fields, respectively, with the two serotypes co-infecting some plants. Of the nine wheat cultivars surveyed, four ...

  13. Genetic variability of indigenous cowpea genotypes as determined ...

    African Journals Online (AJOL)

    Bayesian statistics coupled with the Markov chain Monte Carlo technique was applied to determine population structure, while the genetic variability was established by analysis of molecular variance. UPGMA analysis allowed the separation of the genotypes into three groups, but no relationship between the genetic and ...

  14. Effect of genotype on egg quality characteristics of guinea fowl ...

    African Journals Online (AJOL)

    The genotypes were Pearl x Pearl (PL x PL), Black x Black (BL x BL) and Pearl x Black (PL x BL). ... The external and shell quality parameters measured were egg weight (EWGT), egg length (ELGT), egg width (EWDT), egg shape index (ESPI), shell weight (SWGT), and shell thickness (STKN) while the internal traits were ...

  15. Assessment of genotype x environment interaction on yield and ...

    African Journals Online (AJOL)

    Days to heading, plant height, number of spikes per square meter, number of kernels per spike, spike weight, 1000 kernel weight and grain yield of the genotypes were evaluated in each location. The regression coefficient (bi) of Finlay and Wilkinson (1963) and mean square of deviation from regression (S2d) of Eberhart ...

  16. A preliminary investigation into genotype x environment interaction ...

    African Journals Online (AJOL)

    The purpose of the study was to investigate a possible genotype by environment interaction in first calf South African Holstein cows for both production and reproduction traits. Data from 100 975 cows on a total mixed ration (TMR) and 22 083 pasture based cows were used. These cows were the progeny of 4 391 sires and ...

  17. Epiphytic bacteria from various bean genotypes and their potential ...

    African Journals Online (AJOL)

    Naturally occurring epiphytic non-pathogeni bacteria were isolated from reproductive tissue of various bean genotypes grown in the field and screened for both in vitro and in vivo antagonism to Xanthomonas axonopodis pv. phaseoli (formely X. campestris pv phaseoli). Of the 22 potential bacterial antagonists screened in ...

  18. Evaluation of nutritional quality and antioxidant potential of pigeonpea genotypes. (United States)

    Sekhon, Japjot; Grewal, Satvir Kaur; Singh, Inderjit; Kaur, Jagmeet


    Three released cultivars, forty four advance breeding lines and three wild species of pigeonpea ( Cajanus cajan L. Millsp) were evaluated for nutritional, antinutritional traits and antioxidant potential so as to identify promising genotypes. The average content of total soluble sugars, starch and total soluble proteins was found to be 43.66, 360.51 and 204.54 mg/g, respectively. Antioxidant potential in terms of free radical scavenging activity (DPPH), ferric reducing antioxidant power (FRAP), reducing power, hydroxyl radical scavenging activity and superoxide anion radical scavenging activity was estimated. The diversity was observed in genotypes with all the traits. AL 1960, AL 2000, AL 2009 and AL 2046 had high total soluble proteins, medium antinutritional factors and good antioxidant potential. AL 201, AL 1931, AL 1932, AL 1960, AL 2046, AL 2049 and AL 2060 had good nutritional value as protein and starch content ranged from 20 to 23 and 42 to 52%, respectively. Wild species C. scarabaeoides 1CP15683/W15 had lower carbohydrates, proteins, and antinutritional traits while high antioxidant potential due to high total phenols, DPPH, FRAP and reducing power. The diversity observed in genotypes with all the traits could be further used to develop nutritionally important genotypes.

  19. Serotonin transporter genotype, salivary cortisol, neuroticism and life events

    DEFF Research Database (Denmark)

    Vinberg, Maj; Miskowiak, Kamilla; Kessing, Lars Vedel


    OBJECTIVE: To investigate if cortisol alone or in interaction with other risk factors (familial risk, the serotonin transporter genotype, neuroticism and life events (LEs)) predicts onset of psychiatric disorder in healthy individuals at heritable risk. MATRIAL AND METHODS: In a high-risk study...

  20. Genotyping of African swine fever virus (ASFV) isolates associated ...

    African Journals Online (AJOL)

    Four of these viruses were isolated directly from serum samples. All the viruses were classified within the domesticpig cycle-associated p72 and p54 genotype IX which also includes viruses responsible for ASF outbreaks in Kenya in 2006 and 2007 and Uganda in 2003. To define virus relationships at higher resolution, ...

  1. Leveraging from genotype by environment interaction for bread ...

    African Journals Online (AJOL)

    Developing high yielding and stable genotypes for wide and specific adaptation is ... The analysis of variance for AMMI model of grain yield showed that environment, ... The AMMI biplot, using the first two principal components, showed that testing ... However, extensive testing considering many locations across East African ...

  2. stability analysis of food barley genotypes in northern ethiopia

    African Journals Online (AJOL)


    interaction and stability for barley grain yield and yield related traits in the growing ... that the environments were diverse; causing most of the variation in grain yield. ... component axes IPCA1, IPCA2 and IPCA3, which explained 58.06, 27.11 and ..... AMMI analysis of variance for grain yield (t ha-1) of food barley genotypes ...

  3. Genotype-phenotype associations in children with congenital hyperinsulinism

    DEFF Research Database (Denmark)

    Melikyan, Maria; Brusgaard, Klaus; Petraykina, Elena

    Congenital hyperinsulinism (CHI) is a heterogeneous disease in terms of clinical presentation, genetics and histology. Mutations in eight genes are known to be a cause of CHI, of which ABCC8, KCNJ11 and GCK are among the most common. We investigated genotype-phenotype associations in a cohort...

  4. Growth response at age 10 years of five Eucalyptus genotypes ...

    African Journals Online (AJOL)

    Thus, following the 1999 drought event a trial was established in a drought-prone area, planted to a number of genotypes that were deemed to be more tolerant to water stress than Eucalyptus grandis. Each species was planted at stand densities of 816, 1 600 and 2 066 stems ha-1, where 1 600 stems ha-1 represented the ...

  5. Estimation of genetic diversity in rice ( Oryza sativa L. ) genotypes ...

    African Journals Online (AJOL)

    Thirty rice genotypes comprising land races, pure lines, somaclones, breeding lines and varieties specifically adapted to costal saline environments were characterized by SSR markers and morphological characters in this study. Out of 35 primers of SSR markers, 28 were found to be polymorphic. The PIC value ranged ...

  6. genotype by environment interaction and grain yield stability

    African Journals Online (AJOL)

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    among environments, GXE interaction and Interaction Principal Component Analysis (IPCA-I) but ... value closer to zero, Genotype Selection Index (GSI) of 4 each and AMMI stability value (ASV) of 0.124 and. 0.087 ..... Analysis of variance for grain yield using Additive Mean Effect and Multiple Interactions (AMMI) model.

  7. Genotyping and surveillance for scrapie in Finnish sheep

    Directory of Open Access Journals (Sweden)

    Hautaniemi Maria


    Full Text Available Abstract Background The progression of scrapie is known to be influenced by the amino acid polymorphisms of the host prion protein (PrP gene. There is no breeding programme for TSE resistance in sheep in Finland, but a scrapie control programme has been in place since 1995. In this study we have analysed PrP genotypes of total of 928 purebred and crossbred sheep together with the data of scrapie survey carried out in Finland during 2002–2008 in order to gain knowledge of the genotype distribution and scrapie prevalence in Finnish sheep. Results The ARQ/ARQ genotype was the most common genotype in all breeds studied. ARR allele frequency was less than 12% in purebred Finnish sheep and in most genotypes heterozygous for ARR, the second allele was ARQ. The VRQ allele was not detected in the Grey race sheep of Kainuu or in the Aland sheep, and it was present in less than 6% of the Finnish Landrace sheep. Leucine was the most prominent amino acid found in codon 141. In addition, one novel prion dimorphisms of Q220L was detected. During the scrapie survey of over 15 000 sheep in 2002–2008, no classical scrapie cases and only five atypical scrapie cases were detected. Conclusions The results indicate that the Finnish sheep populations have genetically little resistance to classical scrapie, but no classical scrapie was detected during an extensive survey in 2002–2008. However, five atypical scrapie cases emerged; thus, the disease is present in the Finnish sheep population at a low level.

  8. Lactase persistence genotypes and malaria susceptibility in Fulani of Mali

    Directory of Open Access Journals (Sweden)

    Dolo Amagana


    Full Text Available Abstract Background Fulani are a widely spread African ethnic group characterized by lower susceptibility to Plasmodium falciparum, clinical malaria morbidity and higher rate of lactase persistence compared to sympatric tribes. Lactase non-persistence, often called lactose intolerance, is the normal condition where lactase activity in the intestinal wall declines after weaning. Lactase persistence, common in Europe, and in certain African people with traditions of raising cattle, is caused by polymorphisms in the enhancer region approximately 14 kb upstream of the lactase gene. Methods To evaluate the relationship between malaria and lactase persistence genotypes, a 400 bp region surrounding the main European C/T-13910 polymorphism upstream of the lactase gene was sequenced. DNA samples used in the study originated from 162 Fulani and 79 Dogon individuals from Mali. Results Among 79 Dogon only one heterozygote of the lactase enhancer polymorphism was detected, whereas all others were homozygous for the ancestral C allele. Among the Fulani, the main European polymorphism at locus C/T-13910 was by far the most common polymorphism, with an allele frequency of 37%. Three other single-nucleotide polymorphisms were found with allele frequencies of 3.7%, 1.9% and 0.6% each. The novel DNA polymorphism T/C-13906 was seen in six heterozygous Fulani. Among the Fulani with lactase non-persistence CC genotypes at the C/T-13910 locus, 24% had malaria parasites detectable by microscopy compared to 18% for lactase persistent genotypes (P = 0.29. Pooling the lactase enhancer polymorphisms to a common presumptive genotype gave 28% microscopy positives for non-persistent and 17% for others (P = 0.11. Conclusions Plasmodium falciparum parasitaemia in asymptomatic Fulani is more common in individuals with lactase non-persistence genotypes, but this difference is not statistically significant. The potential immunoprotective properties of dietary cow milk as a reason

  9. Disclosure of APOE genotype for risk of Alzheimer's disease. (United States)

    Green, Robert C; Roberts, J Scott; Cupples, L Adrienne; Relkin, Norman R; Whitehouse, Peter J; Brown, Tamsen; Eckert, Susan LaRusse; Butson, Melissa; Sadovnick, A Dessa; Quaid, Kimberly A; Chen, Clara; Cook-Deegan, Robert; Farrer, Lindsay A


    The apolipoprotein E (APOE) genotype provides information on the risk of Alzheimer's disease, but the genotyping of patients and their family members has been discouraged. We examined the effect of genotype disclosure in a prospective, randomized, controlled trial. We randomly assigned 162 asymptomatic adults who had a parent with Alzheimer's disease to receive the results of their own APOE genotyping (disclosure group) or not to receive such results (nondisclosure group). We measured symptoms of anxiety, depression, and test-related distress 6 weeks, 6 months, and 1 year after disclosure or nondisclosure. There were no significant differences between the two groups in changes in time-averaged measures of anxiety (4.5 in the disclosure group and 4.4 in the nondisclosure group, P=0.84), depression (8.8 and 8.7, respectively; P=0.98), or test-related distress (6.9 and 7.5, respectively; P=0.61). Secondary comparisons between the nondisclosure group and a disclosure subgroup of subjects carrying the APOE epsilon4 allele (which is associated with increased risk) also revealed no significant differences. However, the epsilon4-negative subgroup had a significantly lower level of test-related distress than did the epsilon4-positive subgroup (P=0.01). Subjects with clinically meaningful changes in psychological outcomes were distributed evenly among the nondisclosure group and the epsilon4-positive and epsilon4-negative subgroups. Baseline scores for anxiety and depression were strongly associated with post-disclosure scores of these measures (Pdisclosure of APOE genotyping results to adult children of patients with Alzheimer's disease did not result in significant short-term psychological risks. Test-related distress was reduced among those who learned that they were APOE epsilon4-negative. Persons with high levels of emotional distress before undergoing genetic testing were more likely to have emotional difficulties after disclosure. ( number, NCT

  10. Identification of novel Coxiella burnetii genotypes from Ethiopian ticks.

    Directory of Open Access Journals (Sweden)

    Kinga M Sulyok

    Full Text Available BACKGROUND: Coxiella burnetii, the etiologic agent of Q fever, is a highly infectious zoonotic bacterium. Genetic information about the strains of this worldwide distributed agent circulating on the African continent is limited. The aim of the present study was the genetic characterization of C. burnetii DNA samples detected in ticks collected from Ethiopian cattle and their comparison with other genotypes found previously in other parts of the world. METHODOLOGY/PRINCIPAL FINDINGS: A total of 296 tick samples were screened by real-time PCR targeting the IS1111 region of C. burnetii genome and from the 32 positive samples, 8 cases with sufficient C. burnetii DNA load (Amblyomma cohaerens, n = 6; A. variegatum, n = 2 were characterized by multispacer sequence typing (MST and multiple-locus variable-number tandem repeat analysis (MLVA. One novel sequence type (ST, the proposed ST52, was identified by MST. The MLVA-6 discriminated the proposed ST52 into two newly identified MLVA genotypes: type 24 or AH was detected in both Amblyomma species while type 26 or AI was found only in A. cohaerens. CONCLUSIONS/SIGNIFICANCE: Both the MST and MLVA genotypes of the present work are closely related to previously described genotypes found primarily in cattle samples from different parts of the globe. This finding is congruent with the source hosts of the analyzed Ethiopian ticks, as these were also collected from cattle. The present study provides genotype information of C. burnetii from this seldom studied East-African region as well as further evidence for the presumed host-specific adaptation of this agent.

  11. Genetic diversity of popcorn genotypes using molecular analysis. (United States)

    Resh, F S; Scapim, C A; Mangolin, C A; Machado, M F P S; do Amaral, A T; Ramos, H C C; Vivas, M


    In this study, we analyzed dominant molecular markers to estimate the genetic divergence of 26 popcorn genotypes and evaluate whether using various dissimilarity coefficients with these dominant markers influences the results of cluster analysis. Fifteen random amplification of polymorphic DNA primers produced 157 amplified fragments, of which 65 were monomorphic and 92 were polymorphic. To calculate the genetic distances among the 26 genotypes, the complements of the Jaccard, Dice, and Rogers and Tanimoto similarity coefficients were used. A matrix of Dij values (dissimilarity matrix) was constructed, from which the genetic distances among genotypes were represented in a more simplified manner as a dendrogram generated using the unweighted pair-group method with arithmetic average. Clusters determined by molecular analysis generally did not group material from the same parental origin together. The largest genetic distance was between varieties 17 (UNB-2) and 18 (PA-091). In the identification of genotypes with the smallest genetic distance, the 3 coefficients showed no agreement. The 3 dissimilarity coefficients showed no major differences among their grouping patterns because agreement in determining the genotypes with large, medium, and small genetic distances was high. The largest genetic distances were observed for the Rogers and Tanimoto dissimilarity coefficient (0.74), followed by the Jaccard coefficient (0.65) and the Dice coefficient (0.48). The 3 coefficients showed similar estimations for the cophenetic correlation coefficient. Correlations among the matrices generated using the 3 coefficients were positive and had high magnitudes, reflecting strong agreement among the results obtained using the 3 evaluated dissimilarity coefficients.

  12. Distribution of Hepatitis C Virus Genotypes in the South Marmara Region

    Directory of Open Access Journals (Sweden)

    Harun Agca


    Full Text Available Aim: Hepatitis C virus (HCV is an important caustive agent of hepatitis, cirrhosis and hepatocellular carcinoma both in our country and the world. Prognosis and response to treatment is related with the genotype of HCV which has six genotypes and over a hundred quasispecies. Knowing the HCV genotype is also important for epidemiological data. In this study we aimed to investigate the HCV genotypes of samples sent to Uludag University Hospital Microbiology Laboratory which is the reference centre in the South Marmara Region. Material and Method: This study was done retrospectively to analyse the HCV patients%u2019 sera sent to our laboratory between July 2010and December 2012 for HCV genotyping. Artus HCV QS-RGQ PCR kit (Qiagene,Hilden, Germany was used in Rotor-Gene Q (Qiagene, Hilden Germany for detection of HCV RNA. HCV RNA positive samples of patients%u2019 sera were were used for genotyping by the Linear Array HCV genotyping test (Roche, NJ, USA.Results: 214 (92.6 % of total 231 patients included in the study were genotype 1, one (0.4 % was genotype 2, nine (3.9 % were genotype 3 and, seven (3.4 % were found genotype 4. Three of genotype 3 patients were of foreign nationality, two were born abroad and one of the genotype 4 patients were born abroad. Discussion: Concordant with our country data the most frequent genotype was 1, genotype 2 was seen in patients especially related with foreign countries and genotype 4 was seen rare. The importance of genotype 1, which is seen more frequent in our country and region is; resistance to antiviral treatment and prolonged treatment duration in chronic hepatitis C patients.

  13. Plant genotypes affect aboveground and belowground herbivore interactions by changing chemical defense. (United States)

    Li, Xiaoqiong; Guo, Wenfeng; Siemann, Evan; Wen, Yuanguang; Huang, Wei; Ding, Jianqing


    Spatially separated aboveground (AG) and belowground (BG) herbivores are closely linked through shared host plants, and both patterns of AG-BG interactions and plant responses may vary among plant genotypes. We subjected invasive (USA) and native (China) genotypes of tallow tree (Triadica sebifera) to herbivory by the AG specialist leaf-rolling weevil Heterapoderopsis bicallosicollis and/or the root-feeding larvae of flea beetle Bikasha collaris. We measured leaf damage and leaves rolled by weevils, quantified beetle survival, and analyzed flavonoid and tannin concentrations in leaves and roots. AG and BG herbivores formed negative feedbacks on both native and invasive genotypes. Leaf damage by weevils and the number of beetle larvae emerging as adults were higher on invasive genotypes. Beetles reduced weevil damage and weevils reduced beetle larval emergence more strongly for invasive genotypes. Invasive genotypes had lower leaf and root tannins than native genotypes. BG beetles decreased leaf tannins of native genotypes but increased root tannins of invasive genotypes. AG herbivory increased root flavonoids of invasive genotypes while BG herbivory decreased leaf flavonoids. Invasive genotypes had lower AG and BG herbivore resistance, and negative AG-BG herbivore feedbacks were much stronger for invasive genotypes. Lower tannin concentrations explained overall better AG and BG herbivore performances on invasive genotypes. However, changes in tannins and flavonoids affected AG and BG herbivores differently. These results suggest that divergent selection on chemical production in invasive plants may be critical in regulating herbivore performances and novel AG and BG herbivore communities in new environments.

  14. Neutralizing antibodies in patients with chronic hepatitis C, genotype 1, against a panel of genotype 1 culture viruses

    DEFF Research Database (Denmark)

    Pedersen, Jannie; Jensen, Tanja B; Carlsen, Thomas H R


    , infection treated with pegylated interferon-α and ribavirin. Thirty-nine patients with chronic hepatitis C, genotype 1a or 1b, with either sustained virologic response (n = 23) or non-sustained virologic response (n = 16) were enrolled. Samples taken prior to treatment were tested for their ability...... to neutralize 6 different HCV genotype 1 cell culture recombinants (1a: H77/JFH1, TN/JFH1, DH6/JFH1; 1b: J4/JFH1, DH1/JFH1, DH5/JFH1). The results were expressed as the highest dilution yielding 50% neutralization (NAb50-titer). We observed no genotype or subtype specific differences in NAb50-titers between......The correlation of neutralizing antibodies to treatment outcome in patients with chronic hepatitis C virus (HCV) infection has not been established. The aim of this study was to determine whether neutralizing antibodies could be used as an outcome predictor in patients with chronic HCV, genotype 1...

  15. DOI: 10.18697/ajfand.80.16245 12930 GENOTYPE X ...

    African Journals Online (AJOL)

    genotype x environment interaction and stability of tuber internal quality traits, and iii) ..... environment to another while the dynamic stability is when genotypic ..... TaylorPhysiological, biochemical and molecular responses of the potato.

  16. Biotyping and genotyping (MLVA16 of Brucella abortus isolated from cattle in Brazil, 1977 to 2008.

    Directory of Open Access Journals (Sweden)

    Sílvia Minharro

    Full Text Available Brucellosis is a worldwide distributed zoonosis that causes important economic losses to animal production. In Brazil, information on the distribution of biovars and genotypes of Brucella spp. is scarce or unavailable. This study aimed (i to biotype and genotype 137 Brazilian cattle isolates (from 1977 to 2008 of B. abortus and (ii to analyze their distribution. B. abortus biovars 1, 2 and 3 (subgroup 3b were confirmed and biovars 4 and 6 were first described in Brazil. Genotyping by the panel 1 revealed two groups, one clustering around genotype 40 and another around genotype 28. Panels 2A and 2B disclosed a high diversity among Brazilian B. abortus strains. Eighty-nine genotypes were found by MLVA16. MLVA16 panel 1 and 2 showed geographic clustering of some genotypes. Biotyping and MLVA16 genotyping of Brazilian B. abortus isolates were useful to better understand the epidemiology of bovine brucellosis in the region.

  17. Biological and phylogenetic characterization of a genotype VII Newcastle disease virus from Venezuela: Efficacy of vaccination (United States)

    Here we describe the characterization a virulent genotype VII Newcastle disease virus (NDV) from Venezuela and evaluate the efficacy of heterologous genotype commercial vaccination under field and controlled rearing conditions. Biological pathotyping and molecular analysis were applied. Results sh...

  18. Chlamydia trachomatis Genotypes and the Swedish New Variant among Urogenital Chlamydia trachomatis Strains in Finland

    Directory of Open Access Journals (Sweden)

    Suvi Niemi


    Full Text Available Our aims were to genotype Chlamydia trachomatis strains present in urogenital samples and to investigate the occurrence of the Swedish new variant of C. trachomatis in Finland. We genotyped 160 C. trachomatis positive samples with ompA real-time PCR and analyzed 495 samples for the new variant. The three most prevalent genotypes were E (40%, F (28%, and G (13%. Only two specimens containing bacteria with the variant plasmid were detected. It seems that in Finland the percentage of infections due to genotypes F and G has slightly increased during the last 20 years. Genotypes E and G appear to be more common, and genotypes J/Ja and I/Ia appear to be less common in Europe than in the USA. Although the genotype E was the most common genotype among C. trachomatis strains, the new variant was rarely found in Finland.

  19. Microbe-ID: An open source toolbox for microbial genotyping and species identification (United States)

    Development of tools to identify species, genotypes, or novel strains of invasive organisms is critical for monitoring emergence and implementing rapid response measures. Molecular markers, although critical to identifying species or genotypes, require bioinformatic tools for analysis. However, user...

  20. Sugarcane Genotype Performance in Three Environments (Based on Crop Cycle) at Mardan, Pakistan (United States)

    Sugarcane breeders often face significant genotype x environment interactions in their trials grown under multiple environments. Hence, genotypes need to be tested for their stability across different environments keeping in view the significant interactions. An experiment comprising 28 sugarcane ge...

  1. Short communication: relationship of call rate and accuracy of single nucleotide polymorphism genotypes in dairy cattle. (United States)

    Cooper, T A; Wiggans, G R; VanRaden, P M


    Call rates on both a single nucleotide polymorphism (SNP) basis and an animal basis are used as measures of data quality and as screening tools for genomic studies and evaluations of dairy cattle. To investigate the relationship of SNP call rate and genotype accuracy for individual SNP, the correlation between percentages of missing genotypes and parent-progeny conflicts for each SNP was calculated for 103,313 Holsteins. Correlations ranged from 0.14 to 0.38 for the BovineSNP50 and BovineLD (Illumina Inc., San Diego, CA) and GeneSeek Genomic Profiler (Neogen Corp., Lincoln, NE) chips, with lower correlations for newer chips. For US genomic evaluations, genotypes are excluded for animals with a call rate of call rate for 220,175 Holstein, Jersey, and Brown Swiss genotypes was 99.6%. Animal genotypes with a call rate of ≤99% were examined from the US Department of Agriculture genotype database to determine how genotype call rate is related to accuracy of calls on an animal basis. Animal call rate was determined from SNP used in genomic evaluation and is the number of called autosomal and X-specific SNP genotypes divided by the number of SNP from that type of chip. To investigate the relationship of animal call rate and parentage validation, conflicts between a genotyped animal and its sire or dam were determined through a duo test (opposite homozygous SNP genotypes between sire and progeny; 1,374 animal genotypes) and a trio test (also including conflicts with dam and heterozygous SNP genotype for the animal when both parents are the same homozygote; 482 animal genotypes). When animal call rate was ≤ 80%, parentage validation was no longer reliable with the duo test. With the trio test, parentage validation was no longer reliable when animal call rate was ≤ 90%. To investigate how animal call rate was related to genotyping accuracy for animals with multiple genotypes, concordance between genotypes for 1,216 animals that had a genotype with a call rate of ≤ 99

  2. Parallel or convergent evolution in human population genomic data revealed by genotype networks


    Vahdati, Ali R; Wagner, Andreas


    Background Genotype networks are representations of genetic variation data that are complementary to phylogenetic trees. A genotype network is a graph whose nodes are genotypes (DNA sequences) with the same broadly defined phenotype. Two nodes are connected if they differ in some minimal way, e.g., in a single nucleotide. Results We analyze human genome variation data from the 1,000 genomes project, and construct haploid genotype (haplotype) networks for 12,235 protein coding genes. The struc...

  3. Prevalence of mixed hepatitis C virus (HCV genotypes among recently diagnosed dialysis patients with HCV infection

    Directory of Open Access Journals (Sweden)

    Mohammed A Al Balwi


    Full Text Available Hepatitis C virus (HCV infection is considered a major health problem recognized globally. HCV is a major cause of chronic liver disease that may lead to cirrhosis and hepatocellular carcinoma. The aim of this study was to investigate the prevalence of multiple (mixed HCV genotypes in Saudi patients recently diagnosed with HCV infection and their association with various clinical risk factors. We examined a total of 1,292 newly diagnosed HCV-positive cases between January 2006 and July 2009 at the Molecular Pathology Laboratory, King Abdulaziz Medical City, Riyadh. The clinical and laboratory data of the study patients were collected. The HCV-RNA viral load and its genotyping were carried out with RT-PCR technology to assist in the follow-up and management of HCV-infected patients undergoing antiviral therapy. Twenty-two patients (1.7% were found to have mixed HCV genotypes; of them, mixed genotypes associated with genotype-4 were seen in 19 patients (86%, mixed genotypes associated with genotype-1 were found in 68.4%, with genotype-3 in 26.3% and with genotype-2 in 5.3%. Additionally, mixed genotypes associated with genotype-1 were seen in three cases (13.6%; they were associated with genotype-2 in two (66.7% and with genotype-5 in one patient (33.3%. In conclusion, the prevalence rate of mixed HCV genotypes in the cohort of the newly infected Saudi patients was 1.7%, with genotype-4 being the most frequent genotype encountered.

  4. Genotyping of flavin-containing mono-oxygenase 3 (FMO3) gene by ...

    African Journals Online (AJOL)

    63.40%) of the 306 samples were genotyped using MAMA-PCR and 42 (13.72%) of the 306 samples were genotyped by both of PCR-RFLP and MAMA-PCR and genotyping data were validated by DNA sequencing. The results show that the ...

  5. Evaluation of rice genotypes to salt stress in different growth stages ...

    African Journals Online (AJOL)

    Tolerant genotypes were tested in young seedling stage in hydroponic system and then reproductive stage in 2010. Results show that vegetative growth was less affected by salt stress comparison to reproductive stage. Na and Na-K ratio in tolerant genotypes were lower than suspectible genotypes in salt condition in ...

  6. Mixed genotype transmission bodies and virions contribute to the maintenance of diversity in an insect virus (United States)

    Clavijo, Gabriel; Williams, Trevor; Muñoz, Delia; Caballero, Primitivo; López-Ferber, Miguel


    An insect nucleopolyhedrovirus naturally survives as a mixture of at least nine genotypes. Infection by multiple genotypes results in the production of virus occlusion bodies (OBs) with greater pathogenicity than those of any genotype alone. We tested the hypothesis that each OB contains a genotypically diverse population of virions. Few insects died following inoculation with an experimental two-genotype mixture at a dose of one OB per insect, but a high proportion of multiple infections were observed (50%), which differed significantly from the frequencies predicted by a non-associated transmission model in which genotypes are segregated into distinct OBs. By contrast, insects that consumed multiple OBs experienced higher mortality and infection frequencies did not differ significantly from those of the non-associated model. Inoculation with genotypically complex wild-type OBs indicated that genotypes tend to be transmitted in association, rather than as independent entities, irrespective of dose. To examine the hypothesis that virions may themselves be genotypically heterogeneous, cell culture plaques derived from individual virions were analysed to reveal that one-third of virions was of mixed genotype, irrespective of the genotypic composition of the OBs. We conclude that co-occlusion of genotypically distinct virions in each OB is an adaptive mechanism that favours the maintenance of virus diversity during insect-to-insect transmission. PMID:19939845

  7. Rapid typing of Mannheimia haemolytica major genotypes 1 and 2 using MALDI-TOF mass spectrometry (United States)

    Genotype 2 M. haemolytica predominantly associate over genotype 1 with the lungs of cattle with respiratory disease and ICEs containing antimicrobial resistance genes. Distinct protein masses were detected by MALDI-TOF MS between genotype 1 and 2 strains. MALDI-TOF MS could rapidly differentiate ge...

  8. Choosing tree genotypes for phytoremediation of landfill leachate using phyto-recurrent selection (United States)

    Jill A. Zalesny; Ronald S., Jr. Zalesny; Adam H. Wiese; Richard B. Hall


    Information about the response of poplar (Populus spp.) genotypes to landfill leachate irrigation is needed, along with efficient methods for choosing genotypes based on leachate composition. Poplar clones were irrigated during three cycles of phyto-recurrent selection to test whether genotypes responded differently to leachate and water, and to test...

  9. Response of avocado genotypes to improvement through 60Co gamma radiation

    International Nuclear Information System (INIS)

    Cruz, E. De la; Rubi A, M.; Garcia A, J.M.


    Ten avocado genotypes were subjected to gamma radiation from 0 to 45 Gy in 1993. Vegetative and reproductive data were analysed in a factorial design. Genotypes differed significative on height and fruit number. Radiation affected significative fruit number but not tree height. ''Hass'' showed strongest interaction between genotype and doses, for fruit number. (Author)

  10. Molecular epidemiology of mumps virus in Japan and proposal of two new genotypes. (United States)

    Inou, Yoko; Nakayama, Tetsuo; Yoshida, Naoko; Uejima, Hajime; Yuri, Kenji; Kamada, Makoto; Kumagai, Takuji; Sakiyama, Hiroshi; Miyata, Akiko; Ochiai, Hitoshi; Ihara, Toshiaki; Okafuji, Teruo; Okafuji, Takao; Nagai, Takao; Suzuki, Eitaro; Shimomura, Kunihisa; Ito, Yuhei; Miyazaki, Chiaki


    We isolated 872 strains of mumps virus from naso-pharyngeal secretions in seven different districts of Japan from January 2000 to July 2001. Among them, 57 strains were geno-typed by nucleotide sequencing in part of the hemagglutinin-neuraminidase (HN) and small hydrophobic (SH) protein regions. Four different genotypes (B, G, K, and L) of mumps virus were co-circulating in Japan and the distribution of genotypes varied in geographically different districts. Two new clusters designated as genotypes K and L had more than 7% nucleotide variation in the SH gene. Among the 57 strains, 11 were classified as B, 35 as G, three as K, and eight as L, which was mainly isolated in Tokyo. We also examined 104 stains isolated in a clinic in Mie prefecture from 1993 to 2003. Genotype B was the indigenous strain and genotype K was introduced in 1994. Genotypes B and K co-circulated in the 1990s and were replaced by genotype G in 2000. There was no significant change in neutralizing test antibody titers against genotypes B, G, K, and L using seven post-vaccination sera with Hoshino strain (genotype B) and these four genotypes had a different antigenicity from genotype A. We should continue to watch on mumps virus molecular epidemiology. Copyright 2004 Wiley-Liss, Inc.

  11. Genotype calling in tetraploid species from bi-allelic marker data using mixture models

    NARCIS (Netherlands)

    Voorrips, R.E.; Gort, G.; Vosman, B.


    Background: Automated genotype calling in tetraploid species was until recently not possible, which hampered genetic analysis. Modern genotyping assays often produce two signals, one for each allele of a bi-allelic marker. While ample software is available to obtain genotypes (homozygous for either

  12. Evaluation of rice genotypes to salt stress in different growth stages ...

    African Journals Online (AJOL)



    May 15, 2012 ... Full Length Research Paper. Evaluation of rice genotypes .... study (Table 2). Result in this step showed that the tolerant genotypes belonged to traditional land races (tall) compared to other genotypes (medium and dwarf). Salinity effect on ..... associated abiotic stresses in rice. Field Crop Res. 76: 91-101.

  13. Rationality and emotionality: serotonin transporter genotype influences reasoning bias. (United States)

    Stollstorff, Melanie; Bean, Stephanie E; Anderson, Lindsay M; Devaney, Joseph M; Vaidya, Chandan J


    Reasoning often occurs under emotionally charged, opinion-laden circumstances. The belief-bias effect indexes the extent to which reasoning is based upon beliefs rather than logical structure. We examined whether emotional content increases this effect, particularly for adults genetically predisposed to be more emotionally reactive. SS/SL(G) carriers of the serotonin transporter genotype (5-HTTLPR) were less accurate selectively for evaluating emotional relational reasoning problems with belief-logic conflict relative to L(A)L(A) carriers. Trait anxiety was positively associated with emotional belief-bias, and the 5-HTTLPR genotype significantly accounted for the variance in this association. Thus, deductive reasoning, a higher cognitive ability, is sensitive to differences in emotionality rooted in serotonin neurotransmitter function.

  14. Measles Outbreak with Unique Virus Genotyping, Ontario, Canada, 2015. (United States)

    Thomas, Shari; Hiebert, Joanne; Gubbay, Jonathan B; Gournis, Effie; Sharron, Jennifer; Severini, Alberto; Jiaravuthisan, Manisa; Shane, Amanda; Jaeger, Valerie; Crowcroft, Natasha S; Fediurek, Jill; Sander, Beate; Mazzulli, Tony; Schulz, Helene; Deeks, Shelley L


    The province of Ontario continues to experience measles virus transmissions despite the elimination of measles in Canada. We describe an unusual outbreak of measles in Ontario, Canada, in early 2015 that involved cases with a unique strain of virus and no known association among primary case-patients. A total of 18 cases of measles were reported from 4 public health units during the outbreak period (January 25-March 23, 2015); none of these cases occurred in persons who had recently traveled. Despite enhancements to case-patient interview methods and epidemiologic analyses, a source patient was not identified. However, the molecular epidemiologic analysis, which included extended sequencing, strongly suggested that all cases derived from a single importation of measles virus genotype D4. The use of timely genotype sequencing, rigorous epidemiologic investigation, and a better understanding of the gaps in surveillance are needed to maintain Ontario's measles elimination status.

  15. Improving the precision of genotype selection in wheat performance trials

    Directory of Open Access Journals (Sweden)

    Giovani Benin


    Full Text Available The aim of this study was to verify whether using the Papadakis method improves model assumptions and experimental accuracy in field trials used to determine grain yield for wheat lineages indifferent Value for Cultivation and Use (VCU regions. Grain yield data from 572 field trials at 31 locations in the VCU Regions 1, 2, 3 and 4 in 2007-2011 were used. Each trial was run with and without the use of the Papadakis method. The Papadakis method improved the indices of experimental precision measures and reduced the number of experimental repetitions required to predict grain yield performance among the wheat genotypes. There were differences among the wheat adaptation regions in terms of the efficiency of the Papadakis method, the adjustment coefficient of the genotype averages and the increases in the selective accuracy of grain yield.

  16. Dynamical community structure of populations evolving on genotype networks

    International Nuclear Information System (INIS)

    Capitán, José A.; Aguirre, Jacobo; Manrubia, Susanna


    Neutral evolutionary dynamics of replicators occurs on large and heterogeneous networks of genotypes. These networks, formed by all genotypes that yield the same phenotype, have a complex architecture that conditions the molecular composition of populations and their movements on genome spaces. Here we consider as an example the case of populations evolving on RNA secondary structure neutral networks and study the community structure of the network revealed through dynamical properties of the population at equilibrium and during adaptive transients. We unveil a rich hierarchical community structure that, eventually, can be traced back to the non-trivial relationship between RNA secondary structure and sequence composition. We demonstrate that usual measures of modularity that only take into account the static, topological structure of networks, cannot identify the community structure disclosed by population dynamics

  17. Chlorophyll a fluorescence to phenotype wheat genotypes for heat tolerance

    DEFF Research Database (Denmark)

    Sharma, Dew Kumari; Andersen, Sven Bode; Ottosen, Carl-Otto

    In prospects of global climate change, heat stress is a rising constraint for the productivity of wheat (Triticum aestivum L.). It is a heat-susceptible crop beyond 17-23oC temperature throughout its phenological stages, flowering phase being the most sensitive stage. Chlorophyll a fluorescence...... parameter, maximum quantum yield efficiency of PSII (Fv/Fm) is used as a physiological marker for early stress detection in PSII in plants. We established a reproducible protocol to measure response of wheat genotypes to high temperature based on Fv/Fm. The heat treatment of 40°C in 300 µmol m-2s-1 PAR...... enabled the identification of contrasting wheat genotypes that can be used to study the genetic and physiological nature of heat stress tolerance to dissect quantitative traits into simpler and more heritable traits....

  18. Variability of traits quinoa introduced genotypes (Chenopodium quinoa Willd.

    Directory of Open Access Journals (Sweden)

    Dražić Slobodan


    Full Text Available We analyzed variability and influence of investigated factors on grain yield of quinoa during three year period (2009, 2010, 2011. The experiment was conducted at two locations (Nova Pazova and Surduk, using two introduced genotypes of quinoa: KVL 37 and KVL 52. We detected that location and genotype had important impact. Grain yield varied according to years of study (1224 kg/ha to 1671 kg/ha. Results of regression and correlation analysis indicate on variation of the impact of plant height and number of plants per meter on the grain yield. Correlation coefficients were generally low and didn't show as significant. This indicates that these studies included small number of properties that can affect grain yield. In further work with this introduced species, more properties should be included.

  19. Accurate genotyping across variant classes and lengths using variant graphs

    DEFF Research Database (Denmark)

    Sibbesen, Jonas Andreas; Maretty, Lasse; Jensen, Jacob Malte


    of read k-mers to a graph representation of the reference and variants to efficiently perform unbiased, probabilistic genotyping across the variation spectrum. We demonstrate that BayesTyper generally provides superior variant sensitivity and genotyping accuracy relative to existing methods when used...... collecting a set of candidate variants across discovery methods, individuals and databases, and then realigning the reads to the variants and reference simultaneously. However, this realignment problem has proved computationally difficult. Here, we present a new method (BayesTyper) that uses exact alignment...... to integrate variants across discovery approaches and individuals. Finally, we demonstrate that including a ‘variation-prior’ database containing already known variants significantly improves sensitivity....

  20. Genotyping of presenilin-1 polymorphism in amyotrophic lateral sclerosis. (United States)

    Panas, M; Karadima, G; Kalfakis, N; Psarrou, O; Floroskoufi, P; Kladi, A; Petersen, M B; Vassilopoulos, D


    The mechanisms underlying motor neuron degeneration in amyotrophic lateral sclerosis are not fully understood. Recent studies suggest that apoptosis is involved in the abnormal neural death that occurs in this devastating disease. Presenilin-1, a transmembrane protein, seems to be implicated in apoptosis. To determine whether presenilin-1 intron 8 polymorphism has an influence in the course of amyotrophic lateral sclerosis, we examined this polymorphism genotypes in a large group of patients (n = 72) with amyotrophic lateral sclerosis and in a random sample of 213 healthy individuals. The results showed a significant difference in genotype (P < 0.04) and allele (P < 0.03) distribution between patients controls. These results suggest a possible intervention of presenilin-1 in the pathogenesis of amyotrophic lateral sclerosis.

  1. Diagnostic Challenges in Retinitis Pigmentosa: Genotypic Multiplicity and Phenotypic Variability (United States)

    Chang, Susie; Vaccarella, Leah; Olatunji, Sunday; Cebulla, Colleen; Christoforidis, John


    Retinitis pigmentosa (RP) is a heterogeneous group of inherited retinal disorders. Diagnosis can be challenging as more than 40 genes are known to cause non-syndromic RP and phenotypic expression can differ significantly resulting in variations in disease severity, age of onset, rate of progression, and clinical findings. We describe the clinical manifestations of RP, the more commonly known causative gene mutations, and the genotypic-phenotypic correlation of RP. PMID:22131872

  2. Phylogeography of Japanese encephalitis virus: genotype is associated with climate.

    Directory of Open Access Journals (Sweden)

    Amy J Schuh

    Full Text Available The circulation of vector-borne zoonotic viruses is largely determined by the overlap in the geographical distributions of virus-competent vectors and reservoir hosts. What is less clear are the factors influencing the distribution of virus-specific lineages. Japanese encephalitis virus (JEV is the most important etiologic agent of epidemic encephalitis worldwide, and is primarily maintained between vertebrate reservoir hosts (avian and swine and culicine mosquitoes. There are five genotypes of JEV: GI-V. In recent years, GI has displaced GIII as the dominant JEV genotype and GV has re-emerged after almost 60 years of undetected virus circulation. JEV is found throughout most of Asia, extending from maritime Siberia in the north to Australia in the south, and as far as Pakistan to the west and Saipan to the east. Transmission of JEV in temperate zones is epidemic with the majority of cases occurring in summer months, while transmission in tropical zones is endemic and occurs year-round at lower rates. To test the hypothesis that viruses circulating in these two geographical zones are genetically distinct, we applied Bayesian phylogeographic, categorical data analysis and phylogeny-trait association test techniques to the largest JEV dataset compiled to date, representing the envelope (E gene of 487 isolates collected from 12 countries over 75 years. We demonstrated that GIII and the recently emerged GI-b are temperate genotypes likely maintained year-round in northern latitudes, while GI-a and GII are tropical genotypes likely maintained primarily through mosquito-avian and mosquito-swine transmission cycles. This study represents a new paradigm directly linking viral molecular evolution and climate.

  3. Genotype-Dependent Interaction of Lentil Lines with Ascochyta lentis

    Directory of Open Access Journals (Sweden)

    Ehsan Sari


    Full Text Available Ascochyta blight of lentil is a prevalent disease in many lentil producing regions and can cause major yield and grain quality losses. The most environmentally acceptable and economically profitable method of control is to develop varieties with high levels of durable resistance. Genetic studies to date suggest that ascochyta blight resistance genes (R-gene in lentil lines CDC Robin, ILL 7537, 964a-46, and ILL 1704 are non-allelic. To understand how different R-genes manifest resistance in these genotypes and an accession of Lens ervoides, L-01-827A, with high level of resistance to ascochyta blight, cellular and molecular defense responses were compared after inoculation with the causal pathogen Ascochyta lentis. Pathogenicity testing of the resistant lines to A. lentis inoculation revealed significantly lower disease severity on CDC Robin and ILL 7537 compared to ILL 1704 and 964a-46, and no symptoms of disease were observed on L-01-827A. Histological examinations indicated that cell death triggered by the pathogen might be disrupted as a mechanism of resistance in CDC Robin. In contrast, limiting colonization of epidermal cells by A. lentis is a suggested mechanism of resistance in 964a-46. A time-series comparison of the expressions of hallmark genes in salicylic acid (SA and jasmonic acid (JA signal transduction pathways between CDC Robin and 964a-46 was conducted. These partially resistant genotypes differed in the timing and the magnitude of SA and JA signaling pathway activation. The SA signaling pathway was only triggered in 964a-46, whereas the JA pathway was triggered in both partially resistant genotypes CDC Robin and 964a-46. The expression of JA-associated genes was lower in 964a-46 than CDC Robin. These observations corroborate the existence of diverse ascochyta blight resistance mechanisms in lentil genotypes carrying different R-genes.

  4. Global Surveillance of Emerging Influenza Virus Genotypes by Mass Spectrometry (United States)


    Intercontinental circulation of human influenza A( H1N2 ) reassortant viruses during the 2001–2002 influenza season. J Infect Dis 186: 1490–1493. 6. Taubenberger...Global Surveillance of Emerging Influenza Virus Genotypes by Mass Spectrometry Rangarajan Sampath1*, Kevin L. Russell2, Christian Massire1, Mark W...Infections and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America Background. Effective influenza surveillance requires

  5. Hepatitis G virus infection and genotypes in Iraqi thalassemia patients

    Directory of Open Access Journals (Sweden)

    Maryam S Ibrahim


    Conclusion: the prevalence rate of HGV RNA in β-thalassemia major patients is 18.2%, while the prevalence rate of anti-HGV (past infection is 10.4%. No one of thalassemia patients had HGV RNA and anti-HGV simultaneously. The Gene sequence analysis of PCR products identified HGV genotypes 2 and 5 with percentage of 91.7% and 8.3% respectively

  6. Rationality and emotionality: serotonin transporter genotype influences reasoning bias


    Stollstorff, Melanie; Bean, Stephanie E.; Anderson, Lindsay M.; Devaney, Joseph M.; Vaidya, Chandan J.


    Reasoning often occurs under emotionally charged, opinion-laden circumstances. The belief-bias effect indexes the extent to which reasoning is based upon beliefs rather than logical structure. We examined whether emotional content increases this effect, particularly for adults genetically predisposed to be more emotionally reactive. SS/SLG carriers of the serotonin transporter genotype (5-HTTLPR) were less accurate selectively for evaluating emotional relational reasoning problems with belief...



    Sieni , Elena; Cetica , Valentina; Santoro , Alessandra; Beutel , Karin; Mastrodicasa , Elena; Meeths , Marie; Ciambotti , Benedetta; Brugnolo , Francesca; Zur Stadt , Udo; Pende , Daniela; Moretta , Lorenzo; Griffiths , Gillian M.; Henter , Jan-Inge; Janka , Gritta; Arico , Maurizio


    Abstract Background: Mutations of UNC13D are causative for FHL3 (OMIM 608898). We present a genotype-phenotype study of 845 FHL3 patients. Methods: A consortium of 3 countries planned to pool in a common database data on presenting features and mutations from individual patients with biallelic UNC13D mutations. Results: 845 FHL3 patients (median age: 4.1 months) were reported from Florence, Italy (n=54), Hamburg, Germany (n=18), Stockholm, Sweden (n=123). Their ethnic origi...

  8. Norovirus Genotype Profiles Associated with Foodborne Transmission, 1999??"2012


    Verhoef, Linda; Hewitt, Joanne; Barclay, Leslie; Ahmed, Sharia; Lake, Rob; Hall, Aron J.; Lopman, Ben; Kroneman, Annelies; Vennema, Harry; VinjA(c), Jan; Koopmans, Marion


    textabstractWorldwide, noroviruses are a leading cause of gastroenteritis. They can be transmitted from person to person directly or indirectly through contaminated food, water, or environments. To estimate the proportion of foodborne infections caused by noroviruses on a global scale, we used norovirus transmission and genotyping information from multiple international outbreak surveillance systems (Noronet, CaliciNet, EpiSurv) and from a systematic review of peer-reviewed literature. The pr...

  9. Asian genotype of Chikungunya virus circulating in Venezuela during 2014. (United States)

    Camacho, Daría; Reyes, Jesús; Negredo, Ana; Hernández, Lourdes; Sánchez-Seco, María; Comach, Guillermo


    Chikungunya virus emerged on Saint-Martin Island in the Caribbean in late 2013. Since then in July of 2104 Venezuela reported autochthonous cases. This study reports the first phylogenetic characterization of CHIKV autochthonous cases in Venezuela, 2014. The phylogenetic analysis showed that the CHIKV circulating in Venezuela (Aragua state) belong to the Asian genotype (Caribbean clade) and it is related to viruses that circulated in the same year in the Caribbean. Copyright © 2017 Elsevier B.V. All rights reserved.

  10. Approaches to genotyping individual miracidia of Schistosoma japonicum


    Xiao, Ning; Remais, Justin V.; Brindley, Paul J.; Qiu, Dong-chuan; Carlton, Elizabeth J.; Li, Rong-zhi; Lei, Yang; Blair, David


    Molecular genetic tools are needed to address questions as to the source and dynamics of transmission of the human blood fluke Schistosoma japonicum in regions where human infections have re-emerged, and to characterize infrapopulations in individual hosts. The life-stage that interests us as a target for collecting genotypic data is the miracidium, a very small larval stage that consequently yields very little DNA for analysis. Here, we report the successful development of a multiplex format...

  11. The Distribution Of Bovine Leukemia Virus Genotypes In Cattle From ...

    African Journals Online (AJOL)

    reaction (PCR), to detect BLV provirus, from peripheral blood lymphocytes (PBL) were performed. To identify genotypes, restriction fragment length polymorphism ... On a effectué le test AGID sur des prélèvements de sérum et le test PCR pour détecter le provirus VLB à partir des lymphocytes du sang périphérique. En vue ...

  12. The role of HFE genotype in macrophage phenotype. (United States)

    Nixon, Anne M; Neely, Elizabeth; Simpson, Ian A; Connor, James R


    Iron regulation is essential for cellular energy production. Loss of cellular iron homeostasis has critical implications for both normal function and disease progression. The H63D variant of the HFE gene is the most common gene variant in Caucasians. The resulting mutant protein alters cellular iron homeostasis and is associated with a number of neurological diseases and cancer. In the brain, microglial and infiltrating macrophages are critical to maintaining iron homeostasis and modulating inflammation associated with the pathogenic process in multiple diseases. This study addresses whether HFE genotype affects macrophage function and the implications of these findings for disease processes. Bone marrow macrophages were isolated from wildtype and H67D HFE knock-in mice. The H67D gene variant in mice is the human equivalent of the H63D variant. Upon differentiation, the macrophages were used to analyze iron regulatory proteins, cellular iron release, migration, phagocytosis, and cytokine expression. The results of this study demonstrate that the H67D HFE genotype significantly impacts a number of critical macrophage functions. Specifically, fundamental activities such as proliferation in response to iron exposure, L-ferritin expression in response to iron loading, secretion of BMP6 and cytokines, and migration and phagocytic activity were all found to be impacted by genotype. Furthermore, we demonstrated that exposure to apo-Tf (iron-poor transferrin) can increase the release of iron from macrophages. In normal conditions, 70% of circulating transferrin is unsaturated. Therefore, the ability of apo-Tf to induce iron release could be a major regulatory mechanism for iron release from macrophages. These studies demonstrate that the HFE genotype impacts fundamental components of macrophage phenotype that could alter their role in degenerative and reparative processes in neurodegenerative disorders.

  13. Serotonin Transporter Genotype (5-HTTLPR) Predicts Utilitarian Moral Judgments


    Marsh, Abigail A.; Crowe, Samantha L.; Yu, Henry H.; Gorodetsky, Elena K.; Goldman, David; Blair, R. J. R.


    Background The psychological and neurobiological processes underlying moral judgment have been the focus of extensive recent research. Here we show that serotonin transporter (5-HTTLPR) genotype predicts responses to moral dilemmas featuring foreseen harm to an innocent. Methodology/Principal Findings Participants in this study judged the acceptability of actions that would unintentionally or intentionally harm an innocent victim in order to save others' lives. An analysis of variance reveale...

  14. Phenotypes in defined genotypes including siblings with Usher syndrome. (United States)

    Malm, Eva; Ponjavic, Vesna; Möller, Claes; Kimberling, William J; Andréasson, Sten


    To characterize visual function in defined genotypes including siblings with Usher syndrome. Thirteen patients with phenotypically different subtypes of Usher syndrome, including 3 families with affected siblings, were selected. Genetic analysis and ophthalmological examinations including visual fields, full-field electroretinography (ERG), multifocal electroretinography (mf ERG), and optical coherence tomography (OCT) were assessed. The patients' degree of visual handicap was evaluated by a questionnaire (ADL). Twelve of thirteen patients were genotyped as Usher 1B, 1D, 1F, 2A, 2C or 3A. In 12 of 13 patients examined with ERG the 30 Hz flickering light response revealed remaining cone function. In 3 of the patients with Usher type 1 mf ERG demonstrated a specific pattern, with a sharp distinction between the area with reduced function and the central area with remaining macular function and normal peak time. OCT demonstrated loss of foveal depression with distortion of the foveal architecture in the macula in all patients. The foveal thickness ranged from 159 to 384 µm and was not correlated to retinal function. Three siblings shared the same mutation for Usher 2C but in contrast to previous reports regarding this genotype, 1 of them diverged in phenotype with substantially normal visual fields, almost normal OCT and mf ERG findings, and only moderately reduced rod and cone function according to ERG. Evaluation of visual function comprising both the severity of the rod cone degeneration and the function in the macular region confirm phenotypical heterogeneity within siblings and between different genotypes of Usher syndrome.

  15. A retrospective study on fourteen year hemoglobin genotype ...

    African Journals Online (AJOL)

    This suggests the possibility of many other residents in the capital city of Ondo state carrying the abnormal forms of hemoglobin genotype, and calling for more efforts in the area of genetic counseling. The gene frequencies of A, S, and C were 0.91, 0.08 and 0.01, respectively. The prevalence of HbAA in this study has been ...

  16. Deep Phenotyping: Deep Learning For Temporal Phenotype/Genotype Classification


    Najafi, Mohammad; Namin, Sarah; Esmaeilzadeh, Mohammad; Brown, Tim; Borevitz, Justin


    High resolution and high throughput, genotype to phenotype studies in plants are underway to accelerate breeding of climate ready crops. Complex developmental phenotypes are observed by imaging a variety of accessions in different environment conditions, however extracting the genetically heritable traits is challenging. In the recent years, deep learning techniques and in particular Convolutional Neural Networks (CNNs), Recurrent Neural Networks (RNNs) and Long-Short Term Memories (LSTMs), h...

  17. Fasting Blood Glucose Levels in Different Haemoglobin Genotypes ...

    African Journals Online (AJOL)

    For the different Hb genotypes (HBAA, HBAS, HBSC and HBSS) the following mean fasting blood glucose levels were obtained respectively: 71.9±8.Omg/dl 73.4±7.4mgldl, 94.7±6.Imgldl and 94.6±5.9mgldl. There was a significant difference between the mean fasting blood glucose concentrations of blood groups O,A,B and ...

  18. An epidemiologic survey of methicillin-resistant Staphylococcus aureus by combined use of mec-HVR genotyping and toxin genotyping in a university hospital in Japan. (United States)

    Nishi, Junichiro; Yoshinaga, Masao; Miyanohara, Hiroaki; Kawahara, Motoshi; Kawabata, Masaharu; Motoya, Toshiro; Owaki, Tetsuhiro; Oiso, Shigeru; Kawakami, Masayuki; Kamewari, Shigeko; Koyama, Yumiko; Wakimoto, Naoko; Tokuda, Koichi; Manago, Kunihiro; Maruyama, Ikuro


    To evaluate the usefulness of an assay using two polymerase chain reaction-based genotyping methods in the practical surveillance of methicillin-resistant Staphylococcus aureus (MRSA). Nosocomial infection and colonization were surveyed monthly in a university hospital in Japan for 20 months. Genotyping with mec-HVR is based on the size of the mec-associated hypervariable region amplified by polymerase chain reaction. Toxin genotyping uses a multiplex polymerase chain reaction method to amplify eight staphylococcal toxin genes. Eight hundred nine MRSA isolates were classified into 49 genotypes. We observed differing prevalences of genotypes for different hospital wards, and could rapidly demonstrate the similarity of genotype for outbreak isolates. The incidence of genotype D: SEC/TSST1 was significantly higher in isolates causing nosocomial infections (49.5%; 48 of 97) than in nasal isolates (31.4%; 54 of 172) (P = .004), suggesting that this genotype may represent the nosocomial strains. The combined use of these two genotyping methods resulted in improved discriminatory ability and should be further investigated.

  19. Genotypic characterization of Echinococcus granulosus in Iranian goats

    Directory of Open Access Journals (Sweden)

    Mohammad Reza Youssefi


    Full Text Available Objective: To isolate and characterize the genotype of Echinococcus granulosus (E. granulosus from goats in Mazandaran Province, Northern Iran. Methods: A total of 120 goats were screened from abattoirs of Mazandaran Province, Northern Iran. Forty out of 120 samples were infected with cystic echinococcosis and 29 out of 40 infected samples were fertile hydatid cysts (containing protoscolices which were collected from the livers and lungs of infected goats. DNA samples were extracted from the protoscolices and characterized by mitochondrial DNA sequencing of part of the mitochondrial cytochrome C oxidase subunit 1 gene. Results: Sequences analysis of nine fertile hydatid cysts indicated that all isolated samples were infected with the G1 sheep strain and two sequences were belonged to G1 4 and G1c microvarients of the G1 genotype. Conclusions: The results showed that goats act as alternative intermediate hosts for sheep strain. G1 genotype seems to be the main route of transmission and it should be considered in further studies.

  20. Seroprevalence and genotype of Chlamydia in pet parrots in China. (United States)

    Zhang, N-Z; Zhang, X-X; Zhou, D-H; Huang, S-Y; Tian, W-P; Yang, Y-C; Zhao, Q; Zhu, X-Q


    Parrots are one of the most popular pet birds in China, and can harbour Chlamydia which has significance for human and animal health. We investigated, by indirect haemagglutination assay, the seroprevalence of Chlamydia infection in four species of parrots, namely budgerigars (Melopsittacus undulatus), lovebirds (Agapornis sp.), cockatiels (Nymphicus hollandicus) and Alexandrine parakeets (Psittacula eupatria) that were collected from Weifang and Beijing cities, North China and explored the association between potential risk factors and chlamydial seropositivity. We further determined the genotype of Chlamydia in 21 fresh faecal samples based on the ompA sequence by reconstruction of phylogenetic relationships. Of the 311 parrots examined, 35·37% (95% confidence interval 30·06-40·68) were seropositive, and species, gender, age, season and geographical location were identified as risk factors. Two PCR-positive samples represented Chlamydia psittaci genotype A. The occurrence of C. psittaci genotype A in the droppings of two pet parrots in China suggests potential environmental contamination with Chlamydiaceae and may raise a public health concern.

  1. Rotavirus genotypes in Malaysia and Universal rotavirus vaccination (United States)

    Lee, Way Seah; Lim, Benjamin Tze Ying; Chai, Pei Fan; Kirkwood, Carl D.; Lee, Jimmy Kok Foo


    Group A rotavirus (RV-A) genotypes isolated in Malaysia was studied to estimate the effectiveness of a universal RV-A vaccination in Malaysia. A simple mathematical model was used, with input from a two-year, two-center, prospective study on hospitalization of RV-A gastroenteritis (RVGE) in young children, published data on RV-A hospitalizations and genotypes, mortality on childhood GE and published genotype-specific efficacy data on two RV-A vaccines. Assuming a 95% vaccine coverage, the overall projected effectiveness was 75.7 to 88.1% for Rotateq® and 78.7 to 90.6% for Rotarix® against RVGE-related hospitalizations. The projected annual reduction in RVGE-related deaths was 27 to 32 deaths (from 34 deaths) for Rotateq® and 28 to 32 deaths annually forRotarix®. A universal RV-A vaccine is efficacious in reducing RVGE-related hospitalizations and mortality in Malaysia. PMID:23022710

  2. Apolipoprotein E genotypes associated with Alzheimer disease and concomitant stroke. (United States)

    Fekih-Mrissa, Najiba; Klai, Sarra; Mrad, Meriem; Mansour, Malek; Zaouali, Jamel; Gritli, Nasreddine; Mrissa, Ridha


    The ɛ4 allele of the apolipoprotein E (APOE) gene is a well-characterized genetic risk factor for Alzheimer disease (AD). The association between stroke and a higher risk for AD has also been reported. Our study sought to determine the relationship between the APOE gene and AD and the comorbid risk of stroke. The subjects of this study consisted of 48 patients with AD and 48 members of a control group. All subjects were genotyped for APOE. The results clearly show a significant increased risk of AD in carriers of the APOE ε3/ε4 genotype (P = .003, odds ratio [OR] = 4.1) or ε4 allele (P = .001, OR = 4.2). The risk for stroke in AD patients was also increased for carriers of the APOE ε3/ε4 genotype (P = .02, OR = 9.0) and for carriers of the APOE ε4 allele (P = .004, OR = 5.5). The present study is the first to establish a relationship between APOE ε4 and concomitant AD and stroke in the Tunisian population. Copyright © 2014 National Stroke Association. Published by Elsevier Inc. All rights reserved.

  3. Genotype Reconstruction of Paternity in European Lobsters (Homarus gammarus). (United States)

    Ellis, Charlie D; Hodgson, David J; André, Carl; Sørdalen, Tonje K; Knutsen, Halvor; Griffiths, Amber G F


    Decapod crustaceans exhibit considerable variation in fertilisation strategies, ranging from pervasive single paternity to the near-ubiquitous presence of multiple paternity, and such knowledge of mating systems and behaviour are required for the informed management of commercially-exploited marine fisheries. We used genetic markers to assess the paternity of individual broods in the European lobster, Homarus gammarus, a species for which paternity structure is unknown. Using 13 multiplexed microsatellite loci, three of which are newly described in this study, we genotyped 10 eggs from each of 34 females collected from an Atlantic peninsula in the south-western United Kingdom. Single reconstructed paternal genotypes explained all observed progeny genotypes in each of the 34 egg clutches, and each clutch was fertilised by a different male. Simulations indicated that the probability of detecting multiple paternity was in excess of 95% if secondary sires account for at least a quarter of the brood, and in excess of 99% where additional sire success was approximately equal. Our results show that multiple paternal fertilisations are either absent, unusual, or highly skewed in favour of a single male among H. gammarus in this area. Potential mechanisms upholding single paternal fertilisation are discussed, along with the prospective utility of parentage assignments in evaluations of hatchery stocking and other fishery conservation approaches in light of this finding.

  4. Effects of Genotypes on Economic Traits in Chinese Dairy Goats

    Directory of Open Access Journals (Sweden)

    X. P. Yue


    Full Text Available The aim of this study was to investigate allele frequencies at the CSN1S2 locus in two Chinese dairy goat breeds and the effects of its variation on dairy goat economic traits. Seven hundred and eight goats from Xinong Saanen (XS, n = 268 and Guanzhong (GZ, N = 440 breeds were selected. The milk samples of 268 XS goats were collected during the middle of lactation, body size parameters (708 goats and daily milk yield (202 goats were registered. The RFLP (restriction fragment length polymorphism and SSCP (single strand conformation polymorphism were used to detect the polymorphisms in CSN1S2. The Hardy-Weinberg (HW equilibrium and the associations between body size, milk yield and composition and the genotypes were calculated. The results revealed that only A and F CSN1S2 alleles were found in the two Chinese dairy goat breeds. Allelic frequencies of A and F were 0.795, 0.205 and 0.739, 0.261 in Xinong Saanen and Guanzhong population respectively. Xinong Saanen breed was in Hardy-Weinberg equilibrium, while Guanzhong breed deviated from Hardy-Weinberg equilibrium (p<0.05. The association of polymorphism with economic traits indicated that the goats with FF genotype have higher milk fat and total solid concentration than those with AA and AF genotypes (p<0.05.

  5. Molecular genotyping of Echinococcus granulosus in the North of Iraq. (United States)

    Hammad, Salam Jumaah; Cavallero, Serena; Milardi, Giovanni Luigi; Gabrielli, Simona; D Amelio, Stefano; Al-Nasiri, Fatima Shihab


    Cystic echinococcosis/hydatidosis is an important cosmopolitan zoonotic disease that causes large economic losses and human suffering. The larval stages of Echinococcus granulosus are the etiological agents of cystic echinococcosis that showed different genotypes in different regions in the world. The present study was aimed at the detection of E. granulosus strains circulating in two cities from north of Iraq (Kirkuk and Sulaimania). A total of 47 specimens of hydatid cysts were collected from patients and from different domestic intermediate hosts including cattle, sheep, goat and buffalo from slaughterhouses. Molecular characterization was performed by direct sequencing of the mitochondrial DNA (mtDNA) genes coding for the cytochrome c oxidase I (cox1) and the small subunit ribosomal RNA (rrnS). The results showed a high prevalence for the sheep strain (G1), an isolated finding of the buffalo strain (G3) and the presence of seven and three different microvariants for cox1 and rrnS, respectively. This is the first contribution on molecular genotyping of E. granulosus in Iraq with the observation of genotypes other than G1. Copyright © 2017 Elsevier B.V. All rights reserved.

  6. Effect of chronic radiation on rape genotype formation

    International Nuclear Information System (INIS)

    Fabry, A.; Hannich, K.; Cerny, J.; Vyvadilova, M.


    The F 1 generation of hybrid plants of the Canadian erucic acid-free rape cross-bred with some European winter rape varieties with a high content of erucic acid were chronically irradiated in a gamma-field with doses ranging from 5978 to 329 R er vegetation. In segregating F 2 generations, the irradiation significantly increased the proportion of winter genotypes; a matroclinous influence on the developmental characteristics of plants occurred in irradiated segregating F 2 hybrid populations. As against spring rape, winter rape varieties used as the maternal form during hybridization caused a statistically significant increase in the frequency of winter genotypes. The segregation of half-winter forms in irradiated segregating hybrid populations of the F 2 generation proved the incomplete dominance of the spring habit of oil rape. Chronic irradiation significantly increased erucic-free (0 - 10% of erucic acid) and low-erucic (10 - 20% of erucic acid) genotype frequencies in segregating F 2 generations. Chronic irradiation of the hybrid plants of erucic-free spring rapes and erucic winter rapes with doses ranging from 5978 to 329 R per vegetation, together with the temperature screening of winter forms and with the determination of the fatty acid content, may be considered as an effective method of creating non-erucic and low-erucic winter forms of oil rape. (author)

  7. Effect of genotype x environment interactions of grapevine hybrids characteristics

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    Nikolić Dragan


    Full Text Available Research in this paper was performed at two different locations: Radmilovac and Vršac in Serbia. Four new interspecific hybrids (9846, 9896, 19574 and 20506 which are intended for table consumption were used as a material. Grape yield per unit area, the properties of the bunch (bunch weight, bunch length, bunch width and number of berries in bunch, the properties of berry (berry weight, berry length and berry width, as well as the characteristic of grape quality (sugar content and total acids in the must were studied in selected hybrids. The highest yield per unit area in the localities Radmilovac and Vršac had a hybrid 9896 (14 998 kg/ha; 11 365 kg/ha. Analysis of variance results showed for the bunch weight, bunch width and number of berries in bunch, berry weight and berry length significant differences among the genotypes. Significant differences between investigated localities were determined for the bunch length and all the berry characters. The interaction between genotype and localities showed significant differences for bunch length, berry length and berry width. Since the genotypes in the initial yielding (third year after planting, they are showed satisfactory results in relation to the objectives of selection.

  8. Genotypic and phenotypic diversity of Alicyclobacillus acidocaldarius isolates. (United States)

    Félix-Valenzuela, L; Guardiola-Avila, I; Burgara-Estrella, A; Ibarra-Zavala, M; Mata-Haro, V


    The fruit juice industry recognizes Alicyclobacillus as a major quality control target micro-organism. In this study, we analysed 19 bacterial isolates to identify Alicyclobacillus species by polymerase chain reaction (PCR) and sequencing analyses. Phenotypic and genomic diversity among isolates were investigated by API 50CHB system and ERIC-PCR (enterobacterial repetitive intergenic consensus-PCR) respectively. All bacterial isolates were identified as Alicyclobacillus acidocaldarius, and almost all showed identical DNA sequences according to their 16S rRNA (rDNA) gene partial sequences. Only few carbohydrates were fermented by A. acidocaldarius isolates, and there was little variability in the biochemical profile. Genotypic fingerprinting of the A. acidocaldarius isolates showed high diversity, and clusters by ERIC-PCR were distinct to those obtained from the 16S rRNA gene phylogenetic tree. There was no correlation between phenotypic and genotypic variability in the A. acidocaldarius isolates analysed in this study. Detection of Alicyclobacillus strains is imperative in fruit concentrates and juices due to the production of guaiacol. Identification of the genera originates rejection of the product by processing industry. However, not all the Alicyclobacillus species are deteriorative and hence the importance to differentiate among them. In this study, partial 16S ribosomal RNA sequence alignment allowed the differentiation of species. In addition, ERIC-PCR was introduced for the genotypic characterization of Alicyclobacillus, as an alternative for differentiation among isolates from the same species. © 2015 The Society for Applied Microbiology.

  9. Geographical Distribution of Trypanosoma cruzi Genotypes in Venezuela (United States)

    Carrasco, Hernán J.; Segovia, Maikell; Llewellyn, Martin S.; Morocoima, Antonio; Urdaneta-Morales, Servio; Martínez, Cinda; Martínez, Clara E.; Garcia, Carlos; Rodríguez, Marlenes; Espinosa, Raul; de Noya, Belkisyolé A.; Díaz-Bello, Zoraida; Herrera, Leidi; Fitzpatrick, Sinead; Yeo, Matthew; Miles, Michael A.; Feliciangeli, M. Dora


    Chagas disease is an endemic zoonosis native to the Americas and is caused by the kinetoplastid protozoan parasite Trypanosoma cruzi. The parasite is also highly genetically diverse, with six discrete typing units (DTUs) reported TcI – TcVI. These DTUs broadly correlate with several epidemiogical, ecological and pathological features of Chagas disease. In this manuscript we report the most comprehensive evaluation to date of the genetic diversity of T. cruzi in Venezuela. The dataset includes 778 samples collected and genotyped over the last twelve years from multiple hosts and vectors, including nine wild and domestic mammalian host species, and seven species of triatomine bug, as well as from human sources. Most isolates (732) can be assigned to the TcI clade (94.1%); 24 to the TcIV group (3.1%) and 22 to TcIII (2.8%). Importantly, among the 95 isolates genotyped from human disease cases, 79% belonged to TcI - a DTU common in the Americas, however, 21% belonged to TcIV- a little known genotype previously thought to be rare in humans. Furthermore, were able to assign multiple oral Chagas diseases cases to TcI in the area around the capital, Caracas. We discuss our findings in the context of T. cruzi DTU distributions elsewhere in the Americas, and evaluate the impact they have on the future of Chagas disease control in Venezuela. PMID:22745843

  10. Genotyping of clinical isolates of Acanthamoeba genus in Venezuela. (United States)

    Wagner, Carolina; Reyes-Batlle, María; Ysea, María Alejandra Vethencourt; Pérez, Mónica V Galindo; de Rondón, Carmen Guzmán; Paduani, Anaibeth J Nessi; Pérez, Angelyseb Dorta; López-Arencibia, Atteneri; Sifaoui, Ines; de Galindo, María Virginia Pérez; de Suárez, Eva Pérez; Martínez-Carretero, Enrique; Valladares, Basilio; Piñero, José E; Lorenzo-Morales, Jacob


    Free-living amoebae of Acanthamoeba genus are opportunistic pathogens distributed worldwide. Strains included in this genus are causative agents of a fatal encephalitis and a sight-threating keratitis in humans and other animals. In this study, 550 clinical samples which were collected between 1984 and 2014 from different patients with suspected infections due to Acanthamoeba were initially screened for the presence of this amoebic genus at the Laboratorio de Amibiasis-Escuela de Bioanálisis at the Universidad Central de Venezuela. Samples were cultured in 2% Non-Nutrient agar plates seeded with a layer of heat killed Escherichia coli. From the 550 clinical samples included in this study, 18 of them were positive for Acanthamoeba genus after culture identification. Moreover, positive samples were confirmed after amplification of the Diagnostic Fragment 3 (DF3) of the Acanthamoeba18S rDNA genus and sequencing was carried out in order to genotype the isolated strains of Acanthamoeba. Furthermore, the pathogenic potential of the strains was checked by performing thermotolerance and osmotolerance assays. Sequencing of the DF3 region resulted in the identification of genotype T4 in all the isolated strains. Moreover, most isolates were thermotolerant or both thermotolerant and osmotolerant and thus were classified as potentially pathogenic strains. To the best of our knowledge, this is the first report on the molecular characterization at the genotype level of Acanthamoeba strains in Venezuela.

  11. Identification of Cryptosporidiumspecies and genotypes in dairy cattle in Brazil

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    Flavio Medeiros Paz e Silva

    Full Text Available In this study, we identified Cryptosporidium species and genotypes present in dairy cattle in the central region of São Paulo state, Brazil. Fecal specimens were collected from 200 animals (100 calves and 100 cows in ten dairy farms. Fecal samples were examined using microscopic examination (ME, enzyme immunoassay (EIA and polymerase chain reaction (PCR. Cryptosporidiumspecies and genotypes were determined by restriction fragment length polymorphism (RFLP or DNA sequencing analysis of the SSU-rRNA and GP60 genes. The occurrence of Cryptosporidium spp. infection was 14% (28/200. The occurrence in calves (26% was significantly higher than in cows (2%. Of the 27 Cryptosporidium-positive specimens submitted to genotyping, C. andersoni was identified in 23 (85.1%, C. bovis in three (11.1%, and the zoonotic C. parvum subtype IIaA15G2R1 in one (3.7%. The study demonstrates thatCryptosporidium spp. infection was common and widespread in dairy cattle in this region and that calves have a high prevalence of C. andersoni. Furthermore, the presence of C. parvumsubtype IIaA15G2R1 indicates that dairy calves from this region should be considered a potential source of zoonotic Cryptosporidiumoocysts.

  12. Genotyping Applications for Transplantation and Transfusion Management: The Emory Experience. (United States)

    Fasano, Ross M; Sullivan, Harold Cliff; Bray, Robert A; Gebel, Howard M; Meyer, Erin K; Winkler, Annie M; Josephson, Cassandra D; Stowell, Sean R; Sandy Duncan, Alexander; Roback, John D


    Current genotyping methodologies for transplantation and transfusion management employ multiplex systems that allow for simultaneous detection of multiple HLA antigens, human platelet antigens, and red blood cell (RBC) antigens. The development of high-resolution, molecular HLA typing has led to improved outcomes in unrelated hematopoietic stem cell transplants by better identifying compatible alleles of the HLA-A, B, C, DRB1, and DQB1 antigens. In solid organ transplantation, the combination of high-resolution HLA typing with solid-phase antibody identification has proven of value for highly sensitized patients and has significantly reduced incompatible crossmatches at the time of organ allocation. This database-driven, combined HLA antigen/antibody testing has enabled routine implementation of "virtual crossmatching" and may even obviate the need for physical crossmatching. In addition, DNA-based testing for RBC antigens provides an alternative typing method that mitigates many of the limitations of hemagglutination-based phenotyping. Although RBC genotyping has utility in various transfusion settings, it has arguably been most useful for minimizing alloimmunization in the management of transfusion-dependent patients with sickle cell disease or thalassemia. The availability of high-throughput RBC genotyping for both individuals and large populations of donors, along with coordinated informatics systems to compare patients' antigen profiles with available antigen-negative and/or rare blood-typed donors, holds promise for improving the efficiency, reliability, and extent of RBC matching for this population.

  13. Predicting genotypes environmental range from genome-environment associations. (United States)

    Manel, Stéphanie; Andrello, Marco; Henry, Karine; Verdelet, Daphné; Darracq, Aude; Guerin, Pierre-Edouard; Desprez, Bruno; Devaux, Pierre


    Genome-environment association methods aim to detect genetic markers associated with environmental variables. The detected associations are usually analysed separately to identify the genomic regions involved in local adaptation. However, a recent study suggests that single-locus associations can be combined and used in a predictive way to estimate environmental variables for new individuals on the basis of their genotypes. Here, we introduce an original approach to predict the environmental range (values and upper and lower limits) of species genotypes from the genetic markers significantly associated with those environmental variables in an independent set of individuals. We illustrate this approach to predict aridity in a database constituted of 950 individuals of wild beets and 299 individuals of cultivated beets genotyped at 14,409 random Single Nucleotide Polymorphisms (SNPs). We detected 66 alleles associated with aridity and used them to calculate the fraction (I) of aridity-associated alleles in each individual. The fraction I correctly predicted the values of aridity in an independent validation set of wild individuals and was then used to predict aridity in the 299 cultivated individuals. Wild individuals had higher median values and a wider range of values of aridity than the cultivated individuals, suggesting that wild individuals have higher ability to resist to stress-aridity conditions and could be used to improve the resistance of cultivated varieties to aridity. This article is protected by copyright. All rights reserved. This article is protected by copyright. All rights reserved.

  14. A spatial haplotype copying model with applications to genotype imputation. (United States)

    Yang, Wen-Yun; Hormozdiari, Farhad; Eskin, Eleazar; Pasaniuc, Bogdan


    Ever since its introduction, the haplotype copy model has proven to be one of the most successful approaches for modeling genetic variation in human populations, with applications ranging from ancestry inference to genotype phasing and imputation. Motivated by coalescent theory, this approach assumes that any chromosome (haplotype) can be modeled as a mosaic of segments copied from a set of chromosomes sampled from the same population. At the core of the model is the assumption that any chromosome from the sample is equally likely to contribute a priori to the copying process. Motivated by recent works that model genetic variation in a geographic continuum, we propose a new spatial-aware haplotype copy model that jointly models geography and the haplotype copying process. We extend hidden Markov models of haplotype diversity such that at any given location, haplotypes that are closest in the genetic-geographic continuum map are a priori more likely to contribute to the copying process than distant ones. Through simulations starting from the 1000 Genomes data, we show that our model achieves superior accuracy in genotype imputation over the standard spatial-unaware haplotype copy model. In addition, we show the utility of our model in selecting a small personalized reference panel for imputation that leads to both improved accuracy as well as to a lower computational runtime than the standard approach. Finally, we show our proposed model can be used to localize individuals on the genetic-geographical map on the basis of their genotype data.

  15. Genotype Reconstruction of Paternity in European Lobsters (Homarus gammarus.

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    Charlie D Ellis

    Full Text Available Decapod crustaceans exhibit considerable variation in fertilisation strategies, ranging from pervasive single paternity to the near-ubiquitous presence of multiple paternity, and such knowledge of mating systems and behaviour are required for the informed management of commercially-exploited marine fisheries. We used genetic markers to assess the paternity of individual broods in the European lobster, Homarus gammarus, a species for which paternity structure is unknown. Using 13 multiplexed microsatellite loci, three of which are newly described in this study, we genotyped 10 eggs from each of 34 females collected from an Atlantic peninsula in the south-western United Kingdom. Single reconstructed paternal genotypes explained all observed progeny genotypes in each of the 34 egg clutches, and each clutch was fertilised by a different male. Simulations indicated that the probability of detecting multiple paternity was in excess of 95% if secondary sires account for at least a quarter of the brood, and in excess of 99% where additional sire success was approximately equal. Our results show that multiple paternal fertilisations are either absent, unusual, or highly skewed in favour of a single male among H. gammarus in this area. Potential mechanisms upholding single paternal fertilisation are discussed, along with the prospective utility of parentage assignments in evaluations of hatchery stocking and other fishery conservation approaches in light of this finding.

  16. Response of Wheat Genotypes to Different Levels of Nitrogen

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    Shukra Raj Shrestha


    Full Text Available A field experiment was conducted using six genotypes of wheat (Triticum aestivum L. for response to different levels of nitrogen (N use. The experiment was laid out in split plot design with four levels (0, 50, 100 and 150 kg N ha-1 as main plots and six wheat genotypes (BL 3623, BL 3629, BL 3872, NL 1008, NL 1055 and Vijay, a check variety as sub-plots. Grain yield and other yield components increased linearly in response to N concentrations in both seasons. Only two parameters: days to heading (DOH and days to maturity (DTM varied significantly (p ≤ 0.05 among wheat genotypes in both the years. None of the parameters showed interaction effects in both seasons. Vijay showed highest grain yield of 3.12 t ha-1 in 2013 with the application of 100 kg N ha-1, and 3.23 t ha-1 in 2014 with 150 kg N ha-1. Spike length, productive tillers m-2, number of spikes m-2 and test weight were greater with higher N rates. The straw yield of wheat fertilized with 150 kg N ha-1 was the highest in Vijay (4.35 t ha-1 and BL 3872 (4.33 t ha-1, respectively. Vijay with 100 kg N ha-1 produced the highest number of productive tillers m-2 (276.33 in 2013 and 296.00 with the application of 150 kg N ha-1 in 2014.

  17. Genotyping of circulating measles strains in Italy in 2010

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    Melissa Baggieri


    Full Text Available INTRODUCTION: The European Regional Office of the World Health Organization developed a strategic approach to stop the indigenous transmission of measles in its 53 Member States by 2015. In Italy, laboratory surveillance activity is implemented by the National Reference Laboratory for Measles and Rubella at the Italian National Institute of Health (Istituto Superiore di Sanità, Rome. The role of the National Reference Laboratory is to strengthen surveillance systems through rigorous case investigation and laboratory confirmation of suspected sporadic cases and outbreaks. Genetic characterization of wild-type measles virus is an essential component of the laboratory-based surveillance. This study describes the molecular characterization of measles virus strains isolated during 2010. METHODS: Dried blood spots, urine and oral fluid samples were collected from patients with a suspected measles infection. Serological tests were performed on capillary blood, and viral detection was performed on urine and oral fluid samples through molecular assay. Positive samples were sequenced and phylogenetically analysed. RESULTS AND DISCUSSION: The phylogenetic analysis showed a co-circulation of genotypes D4 and D8, and sporadic cases associated to genotypes D9 and B3. Then, molecular epidemiology of measles cases permitted to establish that D4 and D8 were the endemic genotypes in Italy during 2010.

  18. Contemplation of wheat genotypes for enhanced antioxidant enzyme activity

    International Nuclear Information System (INIS)

    Nasim, S.; Shabbir, G.; Ilyas, M.


    Wheat (Triticum aestivum L.) is leading cereal crop in Pakistan but its yield is highly affected due to various abiotic factors especially drought stress, which affects the metabolism of plants. The present study was conducted at Pir Mehr Ali Shah Arid Agriculture University Rawalpindi, using thirty three genotypes during 2011 to investigate the response of anti oxidative enzymes. Seedlings were subjected to stress condition with 30 % PEG 6000 solution along with control (irrigated with water) under in vitro conditions. The experiment was conducted in pots following Complete Randomized Design in Laboratory. Results revealed that under control conditions the maximum values for Guaiacol peroxidase were found in Punjab-96 and Auqab-2000 (2.523), for superoxide in C-273 (0.294), for ascorbate peroxide in PAK-81 (2.523) and for catalase in Kohsar-95 (0.487). Under moisture stress condition the maximum value for Guaiacol peroxidase were recorded for Kohsar-95 (2.699), for superoxide in Kohsar-95 (1.259), for ascorbate peroxide in Pak-81, SA-75, Mexipak-65 and PARI-73 (3.000) and for catalase in Mexipak-65 (0.640). The genotypes which showed higher antioxidant enzyme activity under drought stress have the ability to perform better under adverse soil moisture condition. Such potential genotypes can be utilized in the future breeding programs and also in improving the wheat varieties against drought stress. (author)

  19. Response of cactus pear genotypes to different crop densities

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    Lucas Aroaldo Dantas Cavalcante


    Full Text Available Considering the importance of cactus pear as an alimentary alternative for the herd of cattle of the Brazilian semiarid region and the effect of crop spacing among plants, this study aimed to evaluate the morphometry, yield and chemical-bromatological composition of cactus pear genotypes, under different cropping densities. The experimental design was completely randomized blocks, in a 3x4 factorial scheme. Treatments consisted of a combination of three cactus pear genotypes (Gigante, Redonda and Miúda and four cropping densities (10,000 plants ha-1; 20,000 plants ha-1; 40,000 plants ha-1; and 80,000 plants ha-1, with three replications. The cactus pear genotypes reacted differently, regarding morphometry, yield and chemical-bromatological composition, and, regardless of the species, the denser planting increased yield (tons ha-1. The Miúda palm presented the highest dry matter yield and consequently the greater accumulation of total digestible nutrients, raw protein and water per hectare, as well as the highest in vitro dry matter digestibility.

  20. Breed traceability of buffalo meat using microsatellite genotyping technique. (United States)

    Kannur, Bheemashankar H; Fairoze, Md Nadeem; Girish, P S; Karabasanavar, Nagappa; Rudresh, B H


    Although buffalo has emerged as a major meat producing animal in Asia, major research on breed traceability has so far been focused on cattle (beef). This research gap on buffalo breed traceability has impelled development and validation of buffalo breed traceability using a set of eight microsatellite (STR) markers in seven Indian buffalo breeds (Bhadawari, Jaffaarabadi, Murrah, Mehsana, Nagpuri, Pandharpuri and Surti). Probability of sharing same profile by two individuals at a specific locus was computed considering different STR numbers, allele pooling in breed and population. Match probabilities per breed were considered and six most polymorphic loci were genotyped. Out of eight microsatellite markers studied, markers CSSMO47, DRB3 and CSSM060 were found most polymorphic. Developed technique was validated with known and unknown, blood and meat samples; wherein, samples were genetically traced in 24 out of 25 samples tested. Results of this study showed potential applications of the methodology and encourage other researchers to address the problem of buffalo traceability so as to create a world-wide archive of breed specific genotypes. This work is the first report of breed traceability of buffalo meat utilizing microsatellite genotyping technique.

  1. Reaction of Cauliflower Genotypes to Black Rot of Crucifers

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    Lincon Rafael da Silva


    Full Text Available This study aimed to evaluate six cauliflower genotypes regarding their resistance to black rot and their production performance. To do so, it was conducted two field experiments in Ipameri, Goiás, Brazil, in 2012 and 2013. It was used a randomized block design, with four replications (total of 24 plots. Each plot consisted of three planting lines 2.5 m long (six plants/line, spaced 1.0 m apart, for a total area of 7.5 m². Evaluations of black rot severity were performed at 45 days after transplanting, this is, 75 days after sowing (DAS, and yield evaluations at 90 to 105 DAS. The Verona 184 genotype was the most resistant to black rot, showing 1.87 and 2.25% of leaf area covered by black rot symptom (LACBRS in 2012 and 2013. However, it was not among the most productive materials. The yield of the genotypes varied between 15.14 and 25.83 t/ha in both years, Lisvera F1 (21.78 and 24.60 t/ha and Cindy (19.95 and 23.56 t/ha being the most productive. However, Lisvera F1 showed 6.37 and 9.37% of LACBRS and Cindy showed 14.25 and 14.87% of LACBRS in 2012 and 2013, being both considered as tolerant to black rot.

  2. Effect of pre- and postpartum supplementation with lipid-encapsulated conjugated linoleic acid on reproductive performance and the growth hormone-insulin-like growth factor-I axis in multiparous high-producing dairy cows. (United States)

    Csillik, Z; Faigl, V; Keresztes, M; Galamb, E; Hammon, H M; Tröscher, A; Fébel, H; Kulcsár, M; Husvéth, F; Huszenicza, Gy; Butler, W R


    The objective of the study was to evaluate the effect of prepartum and postpartum (PP) supplementation with 2 isomers of conjugated linoleic acid (CLA) on reproductive parameters and some related metabolic factors in dairy cows. High-producing, multiparous Holstein Friesian cows (n = 60) were allotted to 3 treatment groups: the CLA1 group (n = 20) was supplemented with 70 g of lipid-encapsulated CLA providing 7 g each of cis-9,trans-11 and trans-10,cis-12 CLA from d 21 (d 21) before expected calving until d 7 after artificial insemination (AI), that is, until 77 to 91 d PP; the CLA2 group (n = 20) was supplemented with the same amount of CLA beginning at calving until d 7 after AI; and the control group (n = 20) received an isocaloric, isonitrogenous, and isolipidic diet. Blood samples were taken weekly to measure glucose, insulin, insulin-like growth factor-I (IGF-I), and leptin. Liver biopsy was performed in 10 cows per group for growth hormone receptor 1A and IGF-I mRNA analyses. At d 49 to 63 PP, ovulation was synchronized with the Pre-Synch protocol followed by fixed-time AI. Milk progesterone was monitored from calving until d 35 post-AI. Cows returning to estrus following AI were inseminated. Supplementation with CLA before calving improved the recovery of plasma leptin levels in the early PP period (from the day of calving until wk 3 PP; treatment effect). Later PP (wk 5), plasma IGF-I, and leptin remained significantly higher in both CLA1 and CLA2 groups compared with control, although hepatocellular IGF-I mRNA was not different among groups. Plasma IGF-I levels remained higher in both CLA-treated groups on the day of AI. Growth hormone receptor 1A mRNA levels in hepatic tissue decreased in all groups, reaching a nadir in the first week PP. Days to first PP ovulation did not differ between groups; however, both supplemented groups conceived earlier compared with control (d 97 ± 19, d 97 ± 23, and d 113 ± 30 for CLA1, CLA2, and control, respectively

  3. The potential of different lime tree (Tilia spp genotypes for phytoextraction of heavy metals

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    Šijačić-Nikolić Mirjana


    Full Text Available The research of heavy metals contents (Pb, Mn, Zn, Ni, Fe in soil in the area of the National Park „Fruška gora”, along the highway M21 shows lower values for manganese, zinc and iron than the maximum allowed quantity prescribed by law. For nickel and lead it shows higher values than maximum allowed quantity. The heavy metals contents in leaves of lime tree in 12 analyzed genotypes are far below average values in accordance with ECCE with all genotypes except genotype 7 for lead and genotypes 7 and 8 for iron. The results of analysis of variance components show that out of four components (locality, genotype, locality x genotype and error only the interaction between locality and genotype does not contribute to variance. The contents of Pb, Mn, Fe and Zn in leaves is primarily influenced by genotype while Ni contents may be considered a consequence of locality. The selection of genotypes which is able to uptake greater quantities of heavy metals than other genotypes may serve as a solid basis for phytoextraction of heavy metals as a technology by which heavy metals, metalloids and radionuclides are extracted from environment through usage of suitable species and plant genotypes able to uptake and accumulate the given pollutants in parts of plant tissue. [Projekat Ministarstva nauke Republike Srbije, br. 43007: Studying climate change and its influence on the environment: Impacts, adaptation and mitigation

  4. Population size estimation in Yellowstone wolves with error-prone noninvasive microsatellite genotypes. (United States)

    Creel, Scott; Spong, Goran; Sands, Jennifer L; Rotella, Jay; Zeigle, Janet; Joe, Lawrence; Murphy, Kerry M; Smith, Douglas


    Determining population sizes can be difficult, but is essential for conservation. By counting distinct microsatellite genotypes, DNA from noninvasive samples (hair, faeces) allows estimation of population size. Problems arise because genotypes from noninvasive samples are error-prone, but genotyping errors can be reduced by multiple polymerase chain reaction (PCR). For faecal genotypes from wolves in Yellowstone National Park, error rates varied substantially among samples, often above the 'worst-case threshold' suggested by simulation. Consequently, a substantial proportion of multilocus genotypes held one or more errors, despite multiple PCR. These genotyping errors created several genotypes per individual and caused overestimation (up to 5.5-fold) of population size. We propose a 'matching approach' to eliminate this overestimation bias.

  5. Detection and genotyping of enteroviruses in cerebrospinal fluid in patients in Victoria, Australia, 2007-2013. (United States)

    Papadakis, Georgina; Chibo, Doris; Druce, Julian; Catton, Michael; Birch, Chris


    Genotyping by VP1 fragment polymerase chain reaction (PCR) and nucleic acid sequencing to detect enterovirus (EV) genotypes was performed directly on 729 EV PCR positive cerebrospinal fluid (CSF) samples collected between 2007 and 2012 from Victorian hospital inpatients. The overall genotype identification rate from CSF-positive material was 43%. The four most common genotypes identified were Echovirus 6 (24%), Echovirus 30 (17%), Echovirus 25 (10%), and Coxsackievirus A9 (10%), together comprising 61% of all EVs typed. The seasonal distribution of all EVs identified followed the recognized pattern of mainly summer epidemics. Three of the four predominant genotypes were present in each of the 6 years in which the study was conducted, with 20 other EV genotypes also detected, often in only a single year. Genotyping of EVs directly in CSF is faster, simpler and more sensitive than traditional virus neutralization assays performed on EV positive samples. © 2014 Wiley Periodicals, Inc.

  6. Genetic diversity for grain Zn concentration in finger millet genotypes: Potential for improving human Zn nutrition

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    Ramegowda Yamunarani


    Full Text Available Nearly half of the world population suffers from micronutrient malnutrition, particularly Zn deficiency. It is important to understand genetic variation for uptake and translocation behaviors of Zn in relevant crop species to increase Zn concentration in edible parts. In the present study, genetic variation in grain Zn concentration of 319 finger millet genotypes was assessed. Large genetic variation was found among the genotypes, with concentrations ranging from 10 to 86 μg g− 1 grain. Uptake and translocation studies with Zn/65Zn application in 12 selected low-Zn genotypes showed wide variation in root uptake and shoot translocation, with genotypes GEC331 and GEC164 showing greater uptake and translocation. Genotypes GEC164 and GEC543 showed increased grain Zn concentration. Genotypes GEC331 and GEC164 also showed improved yield under Zn treatment. Appreciable variation in grain Zn concentration among finger millet genotypes found in this study offers opportunities to improve Zn nutrition through breeding.

  7. Characterization of genotypic variability associated to the phosphorus bioavailability in peanut (Arachis hypogaea L.

    Directory of Open Access Journals (Sweden)

    Mohamed Kraimat


    Full Text Available In order to assess genotypic variability in some peanut genotypes depending on phosphorus availability, both effects of tri-calcium phosphate (TCP and inoculation by Bradyrhizobium strain (BR on morphological and physiological parameters were studied in five peanut genotypes (Arachis hypogaea L., originated from two Algerian areas (Northern and Southern. The results obtained during the flowering stage of crop development, confirmed the positive effect of the contribution of tri-calcium phosphate (TCP with Bradyrhizobium strains on the morphological characters (shoot biomass, root biomass, nodular biomass and leaf and the physiological (nitrogenase activity, phosphorus absorption efficiency by roots (RPAE and phosphorus use efficiency (PUE for the peanut genotypes cultivated in this experiment. Among five genotypes tested, it was noted that the Southern genotypes were more efficient to use TCP in the presence of Bradyrhizobium strain after a screening of these local genotypes, in particular, with phosphorus use efficiency (PUE and shoot biomass production.

  8. Suppression of Langerhans cell activation is conserved amongst human papillomavirus α and β genotypes, but not a µ genotype. (United States)

    Da Silva, Diane M; Movius, Carly A; Raff, Adam B; Brand, Heike E; Skeate, Joseph G; Wong, Michael K; Kast, W Martin


    Human papillomavirus (HPV) has evolved mechanisms that allow it to evade the human immune system. Studies have shown HPV-mediated suppression of activation of Langerhans cells (LC) is a key mechanism through which HPV16 evades initial immune surveillance. However, it has not been established whether high- and low-risk mucosal and cutaneous HPV genotypes share a common mechanism of immune suppression. Here, we demonstrate that LC exposed to capsids of HPV types 18, 31, 45, 11, (alpha-papillomaviruses) and HPV5 (beta-papillomavirus) similarly suppress LC activation, including lack of costimulatory molecule expression, lack of cytokine and chemokine secretion, lack of migration, and deregulated cellular signaling. In contrast, HPV1 (mu-papillomavirus) induced costimulatory molecule and cytokine upregulation, but LC migration and cellular signaling was suppressed. These results suggest that alpha and beta HPV genotypes, and partially a mu genotype, share a conserved mechanism of immune escape that enables these viruses to remain undetected in the absence of other inflammatory events. Copyright © 2014 Elsevier Inc. All rights reserved.

  9. Histomorphological changes in hepatitis C non-responders with respect to viral genotypes

    International Nuclear Information System (INIS)

    Adnan, U.; Mirza, T.; Naz, E.; Aziz, S.


    Objective: To evaluate the distinct histopathological changes of chronic hepatitis C (CHC) non-responders in association with viral genotypes. Methods: This cross-sectional study was conducted at the histopathology section of the Dow Diagnostic Research and Reference Laboratory, Dow University of Health Sciences in collaboration with Sarwar Zuberi Liver Centre, Civil Hospital, Karachi from September 2009 to August 2011. Seventy-five non-responders (end-treatment-response [ETR] positive patients) from a consecutive series of viral-RNA positive CHC patients with known genotypes were selected. Their genotypes and pertinent clinical history was recorded. They were subjected to liver biopsies which were assessed for grade, stage, steatosis, stainable iron and characteristic histological lesions. Results: Majority of the patients (63, 84%) had genotype 3 while 12(16%) cases had genotype 1. The genotype 1 patients had significantly higher scores of inflammation (p<0.03) and fibrosis (p<0.04) as compared to genotype 3. Steatosis was significantly present in all genotype 3 patients in higher scores (p<0.001) compared to genotype 1. Stainable iron scores were generally low in the patients in this study, however, it was more commonly seen in genotype 3. The distribution of characteristic histological lesions was noteworthy in both the groups, irrespective of genotype. Conclusion: In this series, the predominant genotype was 3. However, genotype 1 patients were more prone to the aggressive nature of the disease with significantly higher scores of inflammation and fibrosis. Steatosis was characteristically observed in genotype 3 group. Stainable iron could not be attributed as a cause of non-response. (author)

  10. Sequencing of the Chlamydophila psittaci ompA Gene Reveals a New Genotype, E/B, and the Need for a Rapid Discriminatory Genotyping Method (United States)

    Geens, Tom; Desplanques, Ann; Van Loock, Marnix; Bönner, Brigitte M.; Kaleta, Erhard F.; Magnino, Simone; Andersen, Arthur A.; Everett, Karin D. E.; Vanrompay, Daisy


    Twenty-one avian Chlamydophila psittaci isolates from different European countries were characterized using ompA restriction fragment length polymorphism, ompA sequencing, and major outer membrane protein serotyping. Results reveal the presence of a new genotype, E/B, in several European countries and stress the need for a discriminatory rapid genotyping method. PMID:15872282

  11. High prevalence of Human Parechovirus (HPeV) genotypes in the Amsterdam region and the identification of specific HPeV variants by direct genotyping of stool samples

    NARCIS (Netherlands)

    Benschop, K.; Thomas, X.; Serpenti, C.; Molenkamp, R.; Wolthers, K.


    Human Parechoviruses (HPeV) are widespread pathogens belonging to the Picornavirus family. Six genotypes are known which have predominantly been isolated from children. Data on prevalence of HPeV genotypes are generally based on cell culture, which may underestimate the prevalence of certain HPeV

  12. Hepatitis C viral load, genotype 3 and interleukin-28B CC genotype predict mortality in HIV and hepatitis C-coinfected individuals

    DEFF Research Database (Denmark)

    Clausen, Louise Nygaard; Astvad, Karen; Ladelund, Steen


    OBJECTIVE: We hypothesized that hepatitis C virus (HCV) load and genotype may influence all-cause mortality in HIV-HCV-coinfected individuals. DESIGN AND METHODS: Observational prospective cohort study. Mortality rates were compared in a time-updated multivariate Poisson regression analysis....... RESULTS: We included 264 consecutive HIV-HCV-coinfected individuals. During 1143 person years at risk (PYR) 118 individuals died [overall mortality rate 10 (95% confidence interval; 8, 12)/100 PYR]. In multivariate analysis, a 1 log increase in HCV viral load was associated with a 30% higher mortality......) CC genotype was associated with 54% higher mortality risk [aMRR: 1.54 (0.89, 3.82] compared to TT genotype. CONCLUSION: High-HCV viral load, HCV genotype 3 and IL28B genotype CC had a significant influence on the risk of all-cause mortality among individuals coinfected with HIV-1. This may have...

  13. Study of Various HCV Genotypes in Patients Managing by Referral Clinic in Yazd Province

    Directory of Open Access Journals (Sweden)

    M Pedarzadeh


    Full Text Available Introduction: Determining virus genotype is a major factor for initiation of treatment because various kinds of genotypes need different antiviral drugs. Distribution of hepatitis C genotype in the word is variable in each country or even in each province. So we need to determine distribution pattern of hepatitis C genotype in our region. This study was performed in referral clinic of Yazd province. Methods: This was a descriptive study conducted between 2007 and 2010 on patients who were observed by Yazd referral clinic (the clinic for evaluating and management of patients with high risk behaviors. Ninety two patients who had positive RIBA test for hepatitis C infection were randomly selected and entered the study. Genotyping was performed using RT-PCR method. The primer was "universal primer HCV". Prevalence of various genotypes was analyzed according to gender, addiction and co- existence of HCV-HIV infection. Personal information and laboratory results were analyzed using SPSS. Results: The most common genotype in our study was genotype 3a (65% of cases, followed by 1a (35%. Globally 83% of patients were IV drug addict. Genotype distribution in these patients was similar to others. Fifteen patients had co-infection of HCV-HIV, and 47% of them were contaminated by genotype 1a and 53% with 3a. We could not find any patient contaminated with genotypes 2 or 4. No other genotypes except 1 & 3 or mixed genotype infection could be determined in our patients. Twenty three percent of patients had negative PCR despite positive RIBA test. This indicates that self improvement from acute hepatitis C infection in IV drug addict patients is similar to other people. Conclusion: According to the results of our study, about 2/3 of patients were infected by genotype 3a. This kind of chronic hepatitis C shows a better response to treatment comparing genotype 1a (or 1b with shorter duration and lower cost drugs. But despite higher incidence of genotype 3a, we

  14. Genotype Analysis of Bacillus anthracis Strains Circulating in Bangladesh. (United States)

    Rume, Farzana Islam; Affuso, Alessia; Serrecchia, Luigina; Rondinone, Valeria; Manzulli, Viviana; Campese, Emanuele; Di Taranto, Pietro; Biswas, Paritosh Kumar; Ahsan, Chowdhury Rafiqul; Yasmin, Mahmuda; Fasanella, Antonio; Hugh-Jones, Martin


    In Bangladesh, anthrax, caused by the bacterium Bacillus anthracis, is considered an endemic disease affecting ruminants with sporadic zoonotic occurrences in humans. Due to the lack of knowledge about risks from an incorrect removal of infected carcasses, the disease is not properly monitored, and because of the socio-economic conditions, the situation is under-reported and under-diagnosed. For sensitive species, anthrax represents a fatal outcome with sudden death and sometimes bleeding from natural orifices. The most common source of infection for ruminants is ingestion of spores during grazing in contaminated pastures or through grass and water contaminated with anthrax spores. Domestic cattle, sheep and goats can also become infected through contaminated bone meal (used as feed) originating from anthrax-infected carcasses. The present investigation was conducted to isolate B. anthracis organisms from 169 samples (73 soil, 1 tissue, 4 bone and 91 bone meal samples) collected from 12 different districts of Bangladesh. The sampling was carried out from 2012 to 2015. Twelve samples resulted positive for B. anthracis. Biomolecular analyses were conducted starting from the Canonical Single Nucleotide Polymorphism (CanSNP) to analyze the phylogenetic origin of strains. The analysis of genotype, obtained through the Multiple Locus Variable Number Tandem Repeat Analysis (MLVA) with the analysis of 15 Variable Number Tandem Repeats (VNTR), demonstrated four different genotypes: two of them were previously identified in the district of Sirajganj. The sub-genotyping, conducted with Single Nucleotide Repeats analysis, revealed the presence of eight subgenotypes. The data of the present study concluded that there was no observed correlation between imported cattle feed and anthrax occurrence in Bangladesh and that the remarkable genetic variations of B. anthracis were found in the soil of numerous outbreaks in this country.

  15. Development of a genotyping microarray for Usher syndrome. (United States)

    Cremers, Frans P M; Kimberling, William J; Külm, Maigi; de Brouwer, Arjan P; van Wijk, Erwin; te Brinke, Heleen; Cremers, Cor W R J; Hoefsloot, Lies H; Banfi, Sandro; Simonelli, Francesca; Fleischhauer, Johannes C; Berger, Wolfgang; Kelley, Phil M; Haralambous, Elene; Bitner-Glindzicz, Maria; Webster, Andrew R; Saihan, Zubin; De Baere, Elfride; Leroy, Bart P; Silvestri, Giuliana; McKay, Gareth J; Koenekoop, Robert K; Millan, Jose M; Rosenberg, Thomas; Joensuu, Tarja; Sankila, Eeva-Marja; Weil, Dominique; Weston, Mike D; Wissinger, Bernd; Kremer, Hannie


    Usher syndrome, a combination of retinitis pigmentosa (RP) and sensorineural hearing loss with or without vestibular dysfunction, displays a high degree of clinical and genetic heterogeneity. Three clinical subtypes can be distinguished, based on the age of onset and severity of the hearing impairment, and the presence or absence of vestibular abnormalities. Thus far, eight genes have been implicated in the syndrome, together comprising 347 protein-coding exons. To improve DNA diagnostics for patients with Usher syndrome, we developed a genotyping microarray based on the arrayed primer extension (APEX) method. Allele-specific oligonucleotides corresponding to all 298 Usher syndrome-associated sequence variants known to date, 76 of which are novel, were arrayed. Approximately half of these variants were validated using original patient DNAs, which yielded an accuracy of >98%. The efficiency of the Usher genotyping microarray was tested using DNAs from 370 unrelated European and American patients with Usher syndrome. Sequence variants were identified in 64/140 (46%) patients with Usher syndrome type I, 45/189 (24%) patients with Usher syndrome type II, 6/21 (29%) patients with Usher syndrome type III and 6/20 (30%) patients with atypical Usher syndrome. The chip also identified two novel sequence variants, c.400C>T (p.R134X) in PCDH15 and c.1606T>C (p.C536S) in USH2A. The Usher genotyping microarray is a versatile and affordable screening tool for Usher syndrome. Its efficiency will improve with the addition of novel sequence variants with minimal extra costs, making it a very useful first-pass screening tool.

  16. [Analytic methods for seed models with genotype x environment interactions]. (United States)

    Zhu, J


    Genetic models with genotype effect (G) and genotype x environment interaction effect (GE) are proposed for analyzing generation means of seed quantitative traits in crops. The total genetic effect (G) is partitioned into seed direct genetic effect (G0), cytoplasm genetic of effect (C), and maternal plant genetic effect (Gm). Seed direct genetic effect (G0) can be further partitioned into direct additive (A) and direct dominance (D) genetic components. Maternal genetic effect (Gm) can also be partitioned into maternal additive (Am) and maternal dominance (Dm) genetic components. The total genotype x environment interaction effect (GE) can also be partitioned into direct genetic by environment interaction effect (G0E), cytoplasm genetic by environment interaction effect (CE), and maternal genetic by environment interaction effect (GmE). G0E can be partitioned into direct additive by environment interaction (AE) and direct dominance by environment interaction (DE) genetic components. GmE can also be partitioned into maternal additive by environment interaction (AmE) and maternal dominance by environment interaction (DmE) genetic components. Partitions of genetic components are listed for parent, F1, F2 and backcrosses. A set of parents, their reciprocal F1 and F2 seeds is applicable for efficient analysis of seed quantitative traits. MINQUE(0/1) method can be used for estimating variance and covariance components. Unbiased estimation for covariance components between two traits can also be obtained by the MINQUE(0/1) method. Random genetic effects in seed models are predictable by the Adjusted Unbiased Prediction (AUP) approach with MINQUE(0/1) method. The jackknife procedure is suggested for estimation of sampling variances of estimated variance and covariance components and of predicted genetic effects, which can be further used in a t-test for parameter. Unbiasedness and efficiency for estimating variance components and predicting genetic effects are tested by

  17. Distribution and molecular evolution of bacillus anthracis genotypes in Namibia.

    Directory of Open Access Journals (Sweden)

    Wolfgang Beyer

    Full Text Available The recent development of genetic markers for Bacillus anthracis has made it possible to monitor the spread and distribution of this pathogen during and between anthrax outbreaks. In Namibia, anthrax outbreaks occur annually in the Etosha National Park (ENP and on private game and livestock farms. We genotyped 384 B. anthracis isolates collected between 1983-2010 to identify the possible epidemiological correlations of anthrax outbreaks within and outside the ENP and to analyze genetic relationships between isolates from domestic and wild animals. The isolates came from 20 animal species and from the environment and were genotyped using a 31-marker multi-locus-VNTR-analysis (MLVA and, in part, by twelve single nucleotide polymorphism (SNP markers and four single nucleotide repeat (SNR markers. A total of 37 genotypes (GT were identified by MLVA, belonging to four SNP-groups. All GTs belonged to the A-branch in the cluster- and SNP-analyses. Thirteen GTs were found only outside the ENP, 18 only within the ENP and 6 both inside and outside. Genetic distances between isolates increased with increasing time between isolations. However, genetic distance between isolates at the beginning and end of the study period was relatively small, indicating that while the majority of GTs were only found sporadically, three genetically close GTs, accounting for more than four fifths of all the ENP isolates, appeared dominant throughout the study period. Genetic distances among isolates were significantly greater for isolates from different host species, but this effect was small, suggesting that while species-specific ecological factors may affect exposure processes, transmission cycles in different host species are still highly interrelated. The MLVA data were further used to establish a model of the probable evolution of GTs within the endemic region of the ENP. SNR-analysis was helpful in correlating an isolate with its source but did not elucidate

  18. Bison PRNP genotyping and potential association with Brucella spp. seroprevalence (United States)

    Seabury, C.M.; Halbert, N.D.; Gogan, P.J.P.; Templeton, J.W.; Derr, J.N.


    The implication that host cellular prion protein (PrPC) may function as a cell surface receptor and/or portal protein for Brucella abortus in mice prompted an evaluation of nucleotide and amino acid variation within exon 3 of the prion protein gene (PRNP) for six US bison populations. A non-synonymous single nucleotide polymorphism (T50C), resulting in the predicted amino acid replacement M17T (Met ??? Thr), was identified in each population. To date, no variation (T50: Met) has been detected at the corresponding exon 3 nucleotide and/or amino acid position for domestic cattle. Notably, 80% (20 of 25) of the Yellowstone National Park bison possessing the C/C genotype were Brucella spp. seropositive, representing a significant (P = 0.021) association between seropositivity and the C/C genotypic class. Moreover, significant differences in the distribution of PRNP exon 3 alleles and genotypes were detected between Yellowstone National Park bison and three bison populations that were either founded from seronegative stock or previously subjected to test-and-slaughter management to eradicate brucellosis. Unlike domestic cattle, no indel polymorphisms were detected within the corresponding regions of the putative bison PRNP promoter, intron 1, octapeptide repeat region or 3???-untranslated region for any population examined. This study provides the first evidence of a potential association between nucleotide variation within PRNP exon 3 and the presence of Brucella spp. antibodies in bison, implicating PrPC in the natural resistance of bison to brucellosis infection. ?? 2005 International Society for Animal Genetics.

  19. Genotyping microarray (gene chip) for the ABCR (ABCA4) gene. (United States)

    Jaakson, K; Zernant, J; Külm, M; Hutchinson, A; Tonisson, N; Glavac, D; Ravnik-Glavac, M; Hawlina, M; Meltzer, M R; Caruso, R C; Testa, F; Maugeri, A; Hoyng, C B; Gouras, P; Simonelli, F; Lewis, R A; Lupski, J R; Cremers, F P M; Allikmets, R


    Genetic variation in the ABCR (ABCA4) gene has been associated with five distinct retinal phenotypes, including Stargardt disease/fundus flavimaculatus (STGD/FFM), cone-rod dystrophy (CRD), and age-related macular degeneration (AMD). Comparative genetic analyses of ABCR variation and diagnostics have been complicated by substantial allelic heterogeneity and by differences in screening methods. To overcome these limitations, we designed a genotyping microarray (gene chip) for ABCR that includes all approximately 400 disease-associated and other variants currently described, enabling simultaneous detection of all known ABCR variants. The ABCR genotyping microarray (the ABCR400 chip) was constructed by the arrayed primer extension (APEX) technology. Each sequence change in ABCR was included on the chip by synthesis and application of sequence-specific oligonucleotides. We validated the chip by screening 136 confirmed STGD patients and 96 healthy controls, each of whom we had analyzed previously by single strand conformation polymorphism (SSCP) technology and/or heteroduplex analysis. The microarray was >98% effective in determining the existing genetic variation and was comparable to direct sequencing in that it yielded many sequence changes undetected by SSCP. In STGD patient cohorts, the efficiency of the array to detect disease-associated alleles was between 54% and 78%, depending on the ethnic composition and degree of clinical and molecular characterization of a cohort. In addition, chip analysis suggested a high carrier frequency (up to 1:10) of ABCR variants in the general population. The ABCR genotyping microarray is a robust, cost-effective, and comprehensive screening tool for variation in one gene in which mutations are responsible for a substantial fraction of retinal disease. The ABCR chip is a prototype for the next generation of screening and diagnostic tools in ophthalmic genetics, bridging clinical and scientific research. Copyright 2003 Wiley

  20. Genotype Analysis of Bacillus anthracis Strains Circulating in Bangladesh.

    Directory of Open Access Journals (Sweden)

    Farzana Islam Rume

    Full Text Available In Bangladesh, anthrax, caused by the bacterium Bacillus anthracis, is considered an endemic disease affecting ruminants with sporadic zoonotic occurrences in humans. Due to the lack of knowledge about risks from an incorrect removal of infected carcasses, the disease is not properly monitored, and because of the socio-economic conditions, the situation is under-reported and under-diagnosed. For sensitive species, anthrax represents a fatal outcome with sudden death and sometimes bleeding from natural orifices. The most common source of infection for ruminants is ingestion of spores during grazing in contaminated pastures or through grass and water contaminated with anthrax spores. Domestic cattle, sheep and goats can also become infected through contaminated bone meal (used as feed originating from anthrax-infected carcasses. The present investigation was conducted to isolate B. anthracis organisms from 169 samples (73 soil, 1 tissue, 4 bone and 91 bone meal samples collected from 12 different districts of Bangladesh. The sampling was carried out from 2012 to 2015. Twelve samples resulted positive for B. anthracis. Biomolecular analyses were conducted starting from the Canonical Single Nucleotide Polymorphism (CanSNP to analyze the phylogenetic origin of strains. The analysis of genotype, obtained through the Multiple Locus Variable Number Tandem Repeat Analysis (MLVA with the analysis of 15 Variable Number Tandem Repeats (VNTR, demonstrated four different genotypes: two of them were previously identified in the district of Sirajganj. The sub-genotyping, conducted with Single Nucleotide Repeats analysis, revealed the presence of eight subgenotypes. The data of the present study concluded that there was no observed correlation between imported cattle feed and anthrax occurrence in Bangladesh and that the remarkable genetic variations of B. anthracis were found in the soil of numerous outbreaks in this country.

  1. Genotypic analysis of Mucor from the platypus in Australia. (United States)

    Connolly, J H; Stodart, B J; Ash, G J


    Mucor amphibiorum is the only pathogen known to cause significant morbidity and mortality in the free-living platypus (Ornithorhynchus anatinus) in Tasmania. Infection has also been reported in free-ranging cane toads (Bufo marinus) and green tree frogs (Litoria caerulea) from mainland Australia but has not been confirmed in platypuses from the mainland. To date, there has been little genotyping specifically conducted on M. amphibiorum. A collection of 21 Mucor isolates representing isolates from the platypus, frogs and toads, and environmental samples were obtained for genotypic analysis. Internal transcribed spacer (ITS) region sequencing and GenBank comparison confirmed the identity of most of the isolates. Representative isolates from infected platypuses formed a clade containing the reference isolates of M. amphibiorum from the Centraal Bureau voor Schimmelcultures repository. The M. amphibiorum isolates showed a close sequence identity with Mucor indicus and consisted of two haplotypes, differentiated by single nucleotide polymorphisms within the ITS1 and ITS2 regions. With the exception of isolate 96-4049, all isolates from platypuses were in one haplotype. Multilocus fingerprinting via the use of intersimple sequence repeats polymerase chain reaction identified 19 genotypes. Two major clusters were evident: 1) M. amphibiorum and Mucor racemosus; and 2) Mucor circinelloides, Mucor ramosissimus, and Mucor fragilis. Seven M. amphibiorum isolates from platypuses were present in two subclusters, with isolate 96-4053 appearing genetically distinct from all other isolates. Isolates classified as M. circinelloides by sequence analysis formed a separate subcluster, distinct from other Mucor spp. The combination of sequencing and multilocus fingerprinting has the potential to provide the tools for rapid identification of M. amphibiorum. Data presented on the diversity of the pathogen and further work in linking genetic diversity to functional diversity will provide

  2. Revisiting Robustness and Evolvability: Evolution in Weighted Genotype Spaces (United States)

    Partha, Raghavendran; Raman, Karthik


    Robustness and evolvability are highly intertwined properties of biological systems. The relationship between these properties determines how biological systems are able to withstand mutations and show variation in response to them. Computational studies have explored the relationship between these two properties using neutral networks of RNA sequences (genotype) and their secondary structures (phenotype) as a model system. However, these studies have assumed every mutation to a sequence to be equally likely; the differences in the likelihood of the occurrence of various mutations, and the consequence of probabilistic nature of the mutations in such a system have previously been ignored. Associating probabilities to mutations essentially results in the weighting of genotype space. We here perform a comparative analysis of weighted and unweighted neutral networks of RNA sequences, and subsequently explore the relationship between robustness and evolvability. We show that assuming an equal likelihood for all mutations (as in an unweighted network), underestimates robustness and overestimates evolvability of a system. In spite of discarding this assumption, we observe that a negative correlation between sequence (genotype) robustness and sequence evolvability persists, and also that structure (phenotype) robustness promotes structure evolvability, as observed in earlier studies using unweighted networks. We also study the effects of base composition bias on robustness and evolvability. Particularly, we explore the association between robustness and evolvability in a sequence space that is AU-rich – sequences with an AU content of 80% or higher, compared to a normal (unbiased) sequence space. We find that evolvability of both sequences and structures in an AU-rich space is lesser compared to the normal space, and robustness higher. We also observe that AU-rich populations evolving on neutral networks of phenotypes, can access less phenotypic variation compared to

  3. Genotyping of polymorphic effectors of Toxoplasma gondii isolates from China

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    Weisheng Cheng


    Full Text Available Abstract Background Toxoplasma gondii is an opportunistic protozoan apicomplexan and obligate intracellular parasite that infects a wide range of animals and humans. Rhoptry proteins 5 (ROP5, ROP16, ROP18 and dense granules 15 (GRA15 are the important effectors secreted by T. gondii which link to the strain virulence for mice and modulate the host’s response to the parasite. Little has been known about these molecules as well as GRA3 in type Chinese 1 strains that show polymorphism among strains of archetypical genotypes. This study examined the genetic diversity of these effectors and its correlated virulence in mice among T. gondii isolates from China. Results Twenty-one isolates from stray cats were detected, of which 15 belong to Chinese 1, and 6 to ToxoDB #205. Wh6 isolate, a Chinese 1 strain, has an avirulent phenotype. PCR-RFLP results of ROP5 and ROP18 presented few variations among the strains. Genotyping of GRA15 and ROP16 revealed that all the strains belong to type II allele except Xz7 which carries type I allele. ROP16 amino acid alignment at 503 locus demonstrated that 17 isolates are featured as type I or type III (ROP16I/III, and the other 4 as type II (ROP16II. The strains investigated may be divided into four groups based on GRA3 amino acid alignment, and all isolates of type Chinese 1 belong to the μ-1 allele except Wh6 which is identical to type II strain. Conclusions PCR-RFLP and sequence alignment analyses of ROP5, ROP16, ROP18, GRA3, and GRA15 in T. gondii revealed that strains with the same genotype may have variations in some of their key genes. GRA3 variation exhibited by Wh6 strain may be associated with the difference in phenotype and pathogenesis.

  4. Male Gametophytic Screening of Citrus Genotypes for Salt Stress Tolerance

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    A. Barandan


    Full Text Available Citrus species are classified as a sensitive group of trees to salt stress, but the levels of their sensitivity or tolerance to salt are different among cultivars. In order to evaluate the effects of salinity stress on pollen germination of some citrus cultivars, an experiment was performed in factorial, based on completely randomized design in three replications with Cleopatra mandarin (Citrus reshni and Poncirus trifoliata as tolerant and sensitive controls along with 13 genotypes. Pollen grains of these genotypes were cultured in media containing different levels of sodium chloride (0, 0.87, 1.6, 2.4, 3.1 dS/m along with 15% sucrose, 0.7% agar and 100 mg/L boric acid. In order to understand the biochemical responses of pollen grains to salt stress, they were cultured in liquid media with three levels of salinity (i.e. 0, 0.87 and 1.6 dS/m and then the amounts of total protein and enzyme activities of superoxide dismutase (SOD and ascorbate peroxidase (APX were evaluated. Significant differences of pollen germination (P ≤ 0.01 were observed in different salinity levels, but there were no significant differences in pollen tube growth. Pollen germination in Cleopatra was greater in comparison to Poncirus trifoliate, indicating that Cleopatra is a tolerant cultivar. The amounts of total protein and enzyme activities of SOD and APX were influenced by genotypes, salinity levels and their interactions (P ≤ 0.01. Considering the fastness and accuracy of this type of experiment, the evaluation of citrus pollen responses may, potentially, be hired as an initial screening criteria for detecting salt-sensitive varieties from the tolerant citrus ones.

  5. Genotyping applications for transplantation and transfusion management: The Emory Experience (United States)

    Fasano, Ross M.; Sullivan, Harold Cliff; Bray, Bob; Gebel, Howie; Meyer, Erin K.; Winkler, Annie M.; Josephson, Cassandra D.; Stowell, Sean R.; Duncan, Sandy; Roback, John D.


    Current genotyping methodologies for transplantation and transfusion management employ multiplex systems that allow for the simultaneous detection of multiple human leukocyte antigens (HLA), human platelet antigens (HPA) and red blood cell (RBC) antigens. The development of high resolution molecular HLA typing has led to improved outcomes of unrelated hematopoietic stem cell transplants by better identifying suitable donors typed at the allele level for HLA-A, B, C, DRB1 and DQB1 antigens. In solid organ transplantation, the combination of high resolution HLA typing along with solid-phase antibody identification and the calculated PRA have shown to be of specific benefit to highly sensitized patients, and have resulted in significant reductions of incompatible crossmatches at the time of organ allocation. This database-driven combined HLA antigen/antibody testing has promoted the routine implementation of the virtual crossmatch, in which an electronic crossmatch is performed, and perhaps even obviates the need for a physical crossmatch. Additionally, DNA-based testing for RBC antigens provides as an alternative typing method that mitigates many of the limitations of hemagglutination-based phenotyping. Although there are many applications of RBC genotyping in various transfusion settings, it has arguably been most useful in the management of transfusion-dependent patients with sickle cell disease (SCD) and thalassemia to minimize alloimmunization. The availability of high-throughput RBC genotyping for both patients and large populations of donors, along with coordinated informatics systems to link patients’ antigen needs with available antigen-negative and/or rare blood-typed donors, offer promise toward improving the efficiency, reliability, and extent of RBC matching for this population. PMID:28234571

  6. Development of a genotyping microarray for Usher syndrome (United States)

    Cremers, Frans P M; Kimberling, William J; Külm, Maigi; de Brouwer, Arjan P; van Wijk, Erwin; te Brinke, Heleen; Cremers, Cor W R J; Hoefsloot, Lies H; Banfi, Sandro; Simonelli, Francesca; Fleischhauer, Johannes C; Berger, Wolfgang; Kelley, Phil M; Haralambous, Elene; Bitner‐Glindzicz, Maria; Webster, Andrew R; Saihan, Zubin; De Baere, Elfride; Leroy, Bart P; Silvestri, Giuliana; McKay, Gareth J; Koenekoop, Robert K; Millan, Jose M; Rosenberg, Thomas; Joensuu, Tarja; Sankila, Eeva‐Marja; Weil, Dominique; Weston, Mike D; Wissinger, Bernd; Kremer, Hannie


    Background Usher syndrome, a combination of retinitis pigmentosa (RP) and sensorineural hearing loss with or without vestibular dysfunction, displays a high degree of clinical and genetic heterogeneity. Three clinical subtypes can be distinguished, based on the age of onset and severity of the hearing impairment, and the presence or absence of vestibular abnormalities. Thus far, eight genes have been implicated in the syndrome, together comprising 347 protein‐coding exons. Methods: To improve DNA diagnostics for patients with Usher syndrome, we developed a genotyping microarray based on the arrayed primer extension (APEX) method. Allele‐specific oligonucleotides corresponding to all 298 Usher syndrome‐associated sequence variants known to date, 76 of which are novel, were arrayed. Results Approximately half of these variants were validated using original patient DNAs, which yielded an accuracy of >98%. The efficiency of the Usher genotyping microarray was tested using DNAs from 370 unrelated European and American patients with Usher syndrome. Sequence variants were identified in 64/140 (46%) patients with Usher syndrome type I, 45/189 (24%) patients with Usher syndrome type II, 6/21 (29%) patients with Usher syndrome type III and 6/20 (30%) patients with atypical Usher syndrome. The chip also identified two novel sequence variants, c.400C>T (p.R134X) in PCDH15 and c.1606T>C (p.C536S) in USH2A. Conclusion The Usher genotyping microarray is a versatile and affordable screening tool for Usher syndrome. Its efficiency will improve with the addition of novel sequence variants with minimal extra costs, making it a very useful first‐pass screening tool. PMID:16963483


    Directory of Open Access Journals (Sweden)

    Astanto Kasno


    Full Text Available The acidic soil is generally less productive due to soil pH ranging from 3.1 to 5.0. However, it could be solved through soil amelioration, planting tolerant varieties to acidic soil condition, and a combination of both. Twenty peanut genotypes including two check varieties (Jerapah and Talam 1 were evaluated on dolomite-ameliorated and non ameliorated soil. In the greenhouse, the treatments were laid out in factorial design with four replications, while in the field using strip plot design with three replications. Assessment of tolerance was using Stressed Tolerance Index (STI according to Fernandez (1992. Results showed that dolomite application at dose equivalent to 0.5 x exchangeable Al was optimal in improving peanut growth, and peanut yield on acidic soil. Lines of GH3 (G/92088/92088-02-B-2-8-1 and GH 4 (G/92088/ 92088-02-B-2-8-2 genotypes had high STI with average yield of 2.47 tha-1 and 2.62 t ha-1 of dry pods and potential yield of 4.05 t ha-1 and 3.73 t ha-1 of dry pods, respectively as well as check varieties (Jerapah and Talam-1. It is concluded that peanut genotype of G/92088//92088-02-B-2-8-1 and G/92088//920 88- 02-B-2-8-2 were adaptable and tolerance to acidic, and tolerance of peanuts on acidic soil condition were probably controlled by the buffering mechanisms.

  8. Scanning fluorescence detector for high-throughput DNA genotyping (United States)

    Rusch, Terry L.; Petsinger, Jeremy; Christensen, Carl; Vaske, David A.; Brumley, Robert L., Jr.; Luckey, John A.; Weber, James L.


    A new scanning fluorescence detector (SCAFUD) was developed for high-throughput genotyping of short tandem repeat polymorphisms (STRPs). Fluorescent dyes are incorporated into relatively short DNA fragments via polymerase chain reaction (PCR) and are separated by electrophoresis in short, wide polyacrylamide gels (144 lanes with well to read distances of 14 cm). Excitation light from an argon laser with primary lines at 488 and 514 nm is introduced into the gel through a fiber optic cable, dichroic mirror, and 40X microscope objective. Emitted fluorescent light is collected confocally through a second fiber. The confocal head is translated across the bottom of the gel at 0.5 Hz. The detection unit utilizes dichroic mirrors and band pass filters to direct light with 10 - 20 nm bandwidths to four photomultiplier tubes (PMTs). PMT signals are independently amplified with variable gain and then sampled at a rate of 2500 points per scan using a computer based A/D board. LabView software (National Instruments) is used for instrument operation. Currently, three fluorescent dyes (Fam, Hex and Rox) are simultaneously detected with peak detection wavelengths of 543, 567, and 613 nm, respectively. The detection limit for fluorescein-labeled primers is about 100 attomoles. Planned SCAFUD upgrades include rearrangement of laser head geometry, use of additional excitation lasers for simultaneous detection of more dyes, and the use of detector arrays instead of individual PMTs. Extensive software has been written for automatic analysis of SCAFUD images. The software enables background subtraction, band identification, multiple- dye signal resolution, lane finding, band sizing and allele calling. Whole genome screens are currently underway to search for loci influencing such complex diseases as diabetes, asthma, and hypertension. Seven production SCAFUDs are currently in operation. Genotyping output for the coming year is projected to be about one million total genotypes (DNA

  9. Prevalence of genotypic HIV-1 drug resistance in Thailand, 2002

    Directory of Open Access Journals (Sweden)

    Watitpun Chotip


    Full Text Available Abstract Background The prices of reverse transcriptase (RT inhibitors in Thailand have been reduced since December 1, 2001. It is expected that reduction in the price of these inhibitors may influence the drug resistance mutation pattern of HIV-1 among infected people. This study reports the frequency of HIV-1 genetic mutation associated with drug resistance in antiretroviral-treated patients from Thailand. Methods Genotypic resistance testing was performed on samples collected in 2002 from 88 HIV-1 infected individuals. Automated DNA sequencing was used to genotype the HIV-1 polymerase gene isolated from patients' plasma. Results Resistance to protease inhibitors, nucleoside and non-nucleoside reverse transcriptase inhibitors were found in 10 (12%, 42 (48% and 19 (21% patients, respectively. The most common drug resistance mutations in the protease gene were at codon 82 (8%, 90 (7% and 54 (6%, whereas resistant mutations at codon 215 (45%, 67 (40%, 41 (38% and 184 (27% were commonly found in the RT gene. This finding indicates that genotypic resistance to nucleoside reverse transcriptase inhibitors was prevalent in 2002. The frequency of resistant mutations corresponding to non-nucleoside reverse transcriptase inhibitors was three times higher-, while resistant mutation corresponding to protease inhibitors was two times lower than those frequencies determined in 2001. Conclusion This study shows that the frequencies of RT inhibitor resistance mutations have been increased after the reduction in the price of RT inhibitors since December 2001. We believe that this was an important factor that influenced the mutation patterns of HIV-1 protease and RT genes in Thailand.

  10. Natural history of acute and chronic hepatitis B: The role of HBV genotypes and mutants. (United States)

    Lin, Chih-Lin; Kao, Jia-Horng


    Molecular epidemiologic studies reveal remarkable differences in the geographical distribution of hepatitis B virus (HBV) genotypes. The frequency of mutants among HBV genotypes also varies. The role of HBV genotypes/mutants in the pathogenesis of HBV infection and natural history of HBV infection has been extensively investigated. The distribution of HBV genotypes in acute hepatitis B patients reflects the predominant genotypes in a given geographic area. In chronic hepatitis B patients, genotype C and D have a higher frequency of basal core promoter A1762T/G1764A mutations than genotype A and B. HBV genotypes C, D and F carry a higher lifetime risk of cirrhosis and HCC development than genotype A and B. HBV pre-S/S gene mutations were associated with immune escape of hepatitis B immunoglobulin or vaccine-induced immunity. Mutations in the pre-S, core promoter and X regions correlate with an increased risk of cirrhosis and HCC. In summary, HBV genotypes and mutants are associated with the disease progression and long-term outcome of HBV infection. They may serve as viral genetic markers for risk stratification of chronic hepatitis B patients in clinical practice. Copyright © 2017 Elsevier Ltd. All rights reserved.

  11. BK polyomavirus genotypes Ia and Ib1 exhibit different biological properties in renal transplant recipients. (United States)

    Varella, Rafael B; Zalona, Ana Carolina J; Diaz, Nuria C; Zalis, Mariano G; Santoro-Lopes, Guilherme


    BK polyomavirus (BKV) is an opportunist agent associated with nephropathy (BKVAN) in 1-10% of kidney transplant recipients. BKV is classified into genotypes or subgroups according to minor nucleotidic variations with unknown biological implications. Studies assessing the possible association between genotypes and the risk of BKVAN in kidney transplant patients have presented conflicting results. In these studies, genotype Ia, which is highly prevalent in Brazil, was less frequently found and, thus, comparative data on the biological properties of this genotype are lacking. In this study, BKV Ia and Ib1 genotypes were compared according to their viral load, genetic evolution (VP1 and NCCR) - in a cohort of renal transplant recipients. The patients infected with Ia (13/23; 56.5%) genotype exhibited higher viral loads in urine [>1.4 log over Ib1 (10/23; 43.5%); p=0.025]. In addition, genotype Ia was associated with diverse mutations at VP1 loops and sites under positive selection outside loops, which were totally absent in Ib1. Although the number of viremic patients was similar, the three patients who had BK nephropathy (BKVAN) were infected with Ia genotype. NCCR architecture (ww or rr) were not distinctive between Ia and Ib1 genotypes. Ia genotype, which is rare in other published BKV cohorts, presented some diverse biological properties in transplanted recipients in comparison to Ib1. Copyright © 2017 Elsevier B.V. All rights reserved.

  12. Genonets server-a web server for the construction, analysis and visualization of genotype networks. (United States)

    Khalid, Fahad; Aguilar-Rodríguez, José; Wagner, Andreas; Payne, Joshua L


    A genotype network is a graph in which vertices represent genotypes that have the same phenotype. Edges connect vertices if their corresponding genotypes differ in a single small mutation. Genotype networks are used to study the organization of genotype spaces. They have shed light on the relationship between robustness and evolvability in biological systems as different as RNA macromolecules and transcriptional regulatory circuits. Despite the importance of genotype networks, no tool exists for their automatic construction, analysis and visualization. Here we fill this gap by presenting the Genonets Server, a tool that provides the following features: (i) the construction of genotype networks for categorical and univariate phenotypes from DNA, RNA, amino acid or binary sequences; (ii) analyses of genotype network topology and how it relates to robustness and evolvability, as well as analyses of genotype network topography and how it relates to the navigability of a genotype network via mutation and natural selection; (iii) multiple interactive visualizations that facilitate exploratory research and education. The Genonets Server is freely available at © The Author(s) 2016. Published by Oxford University Press on behalf of Nucleic Acids Research.

  13. Discrepancy between Hepatitis C Virus Genotypes and NS4-Based Serotypes: Association with Their Subgenomic Sequences

    Directory of Open Access Journals (Sweden)

    Nan Nwe Win


    Full Text Available Determination of hepatitis C virus (HCV genotypes plays an important role in the direct-acting agent era. Discrepancies between HCV genotyping and serotyping assays are occasionally observed. Eighteen samples with discrepant results between genotyping and serotyping methods were analyzed. HCV serotyping and genotyping were based on the HCV nonstructural 4 (NS4 region and 5′-untranslated region (5′-UTR, respectively. HCV core and NS4 regions were chosen to be sequenced and were compared with the genotyping and serotyping results. Deep sequencing was also performed for the corresponding HCV NS4 regions. Seventeen out of 18 discrepant samples could be sequenced by the Sanger method. Both HCV core and NS4 sequences were concordant with that of genotyping in the 5′-UTR in all 17 samples. In cloning analysis of the HCV NS4 region, there were several amino acid variations, but each sequence was much closer to the peptide with the same genotype. Deep sequencing revealed that minor clones with different subgenotypes existed in two of the 17 samples. Genotyping by genome amplification showed high consistency, while several false reactions were detected by serotyping. The deep sequencing method also provides accurate genotyping results and may be useful for analyzing discrepant cases. HCV genotyping should be correctly determined before antiviral treatment.

  14. Response of cotton genotypes to boron under-b-adequate conditions

    International Nuclear Information System (INIS)

    Shah, J. A.; Sial, M. A.; Hassan, Z. U.; Rajpar, I.


    Balanced boron (B) application is well-known to enhance the cotton production; however, the narrow range between B-deficiency and toxicity levels makes it difficult to manage. Cotton genotypes extensively differ in their response to B requirements. The adequate dose of B for one genotype may be insufficient or even toxic to other genotype. The effects of boron (B) on seed cotton yield and its various yield associated traits were studied on 10 cotton genotypes of Pakistan. The pot studies were undertaken to categorize cotton genotypes using B-deficient (control) and B-adequate (2.0 kg B ha-1) levels arranged in CRD with four repeats. The results indicated that the seed cotton yield, yield attributes and B-uptake of genotypes were comparatively decreased in B-deficient stressed treatment. Genotype NIA-Ufaq exhibited wide range of adaptation and ranked as efficient-responsive, as it produced higher seed cotton yield under both B-regimes. SAU-2 and CIM-506 were highly-efficient and remaining all genotypes were medium-efficient. Genotype Sindh-1 produced low seed cotton yield under B deficient condition and ranked as low-efficient. B-efficient cotton genotypes can be grown in B deficient soils without B application. (author)

  15. Evaluating potassium-use-efficiency of five cotton genotypes of pakistan

    International Nuclear Information System (INIS)

    Hassan, Z.U.; Kubar, K.A.


    Potassium (K) deficiency in Pakistani soils has been recently reported as the major limiting factor affecting sustainable cotton production. The present study was conducted to envisage how K nutrition affect the growth, biomass production, yield and K-use-efficiency of five cotton genotypes, NIBGE-3701, NIBGE-1524 (Bt-transgenic), Sadori, Sindh-1 and SAU-2 (non-Bt conventional), commonly grown in Pakistan. All five genotypes were raised at deficient and adequate K levels, i.e. 0 and 60 kg K/sub 2/O ha-1, respectively. The experiment was performed in plastic pots following a completely randomized factorial design with three repeats. Adequate K nutrition significantly increased various plant growth traits and yield of all cotton genotypes under study, viz. number of sympodia (21%), number of leaves (34%), leaf dry biomass (30%), shoot dry biomass (31%), number of bolls (50%) and yield of seed cotton (92%). Substantial variations were observed among cotton genotypes for their K-use-efficiency and K-response-efficiency. Sadori and SAU-2 were screened as most K-use-efficient cotton genotypes, while Sindh-1 and SAU-2 were ranked as the most K-responsive cotton genotypes. Interestingly, Sadori did not respond to K nutrition. Moreover, Bt cotton genotypes accumulated more K as compared to non-Bt genotypes. The cotton genotype SAU-2 was identified as efficient-response genotype for better adaptation for both low- and high-K-input sustainable cotton agriculture systems. (author)

  16. Representativeness of Tuberculosis Genotyping Surveillance in the United States, 2009-2010. (United States)

    Shak, Emma B; France, Anne Marie; Cowan, Lauren; Starks, Angela M; Grant, Juliana


    Genotyping of Mycobacterium tuberculosis isolates contributes to tuberculosis (TB) control through detection of possible outbreaks. However, 20% of U.S. cases do not have an isolate for testing, and 10% of cases with isolates do not have a genotype reported. TB outbreaks in populations with incomplete genotyping data might be missed by genotyping-based outbreak detection. Therefore, we assessed the representativeness of TB genotyping data by comparing characteristics of cases reported during January 1, 2009-December 31, 2010, that had a genotype result with those cases that did not. Of 22,476 cases, 14,922 (66%) had a genotype result. Cases without genotype results were more likely to be patients <19 years of age, with unknown HIV status, of female sex, U.S.-born, and with no recent history of homelessness or substance abuse. Although cases with a genotype result are largely representative of all reported U.S. TB cases, outbreak detection methods that rely solely on genotyping data may underestimate TB transmission among certain groups.

  17. Representativeness of Tuberculosis Genotyping Surveillance in the United States, 2009–2010 (United States)

    Shak, Emma B.; Cowan, Lauren; Starks, Angela M.; Grant, Juliana


    Genotyping of Mycobacterium tuberculosis isolates contributes to tuberculosis (TB) control through detection of possible outbreaks. However, 20% of U.S. cases do not have an isolate for testing, and 10% of cases with isolates do not have a genotype reported. TB outbreaks in populations with incomplete genotyping data might be missed by genotyping-based outbreak detection. Therefore, we assessed the representativeness of TB genotyping data by comparing characteristics of cases reported during January 1, 2009–December 31, 2010, that had a genotype result with those cases that did not. Of 22,476 cases, 14,922 (66%) had a genotype result. Cases without genotype results were more likely to be patients <19 years of age, with unknown HIV status, of female sex, U.S.-born, and with no recent history of homelessness or substance abuse. Although cases with a genotype result are largely representative of all reported U.S. TB cases, outbreak detection methods that rely solely on genotyping data may underestimate TB transmission among certain groups. PMID:26556930

  18. Nonrandom association of a type II procollagen genotype with achondroplasia



    Achondroplasia is an autosomal dominant disorder that involves defective endochondral bone formation. Type II collagen is the predominant collagen of cartilage. We found a HindIII polymorphic site in the normal Caucasian population by using the type II procollagen gene probe pgHCol(II)A. The presence of this site yields a 7.0-kilobase (kb) band; its absence yields a 14.0-kb band. We found a significant deviation in genotype distribution and allele frequencies in a population of unrelated indi...

  19. Human papillomavirus testing and genotyping in cervical screening

    DEFF Research Database (Denmark)

    Rebolj, Matejka; Lynge, Elsebeth; Bonde, Jesper


    the incidence of cervical cancer, but has a low sensitivity for high-grade cervical intraepithelial neoplasia (CIN) and requires frequent testing. Several HPV tests have become available commercially. They appear to be more sensitive for high-grade CIN, and may further reduce the incidence of cervical cancer......Mass vaccination against human papillomavirus (HPV) genotypes 16 and 18 will, in the long term, reduce the incidence of cervical cancer, but screening will remain an important cancer control measure in both vaccinated and unvaccinated women. Since the 1960s, cytology screening has helped to reduce...

  20. Preliminary Evaluation of Some Elicited Apple Genotypes Candidate as Cultivars Using Morphological and Molecular Markers

    Directory of Open Access Journals (Sweden)

    Bayan Muzher


    Full Text Available Preliminary evaluation of 5 apple genotypes produced by seed selection in the germplasm of seed rootstocks in Sweida- Syria was carried out between 2005 and 2012, to study date of full flowering, maturity time, morphological characters of tree, shoots, leaves, flowers, and fruits, including chemical analysis. On the other hand, yield efficiency, fruit storability and the susceptibility to pests and physiological disorders were evaluated. Molecular characterization was achieved by using 8 pairs of SSR primers for the 5th genotypes in comparison with the two main commercial cultivars "Golden Delicious" and "Starking Delicious" to determine the genetic relationship between the studied genotypes and cultivars. The results divided the studied genotypes depending on the time of ripening into three groups: early, intermediate and late genotypes. All studied genotypes gave efficient and regular yield, and showed fixable fruit shape and size with variable storability due to maturity time. Molecular characterization reveled the ability of SSR technique to determine the genetic variation between the studied genotypes, the 8 primer pairs produced 22 alleles, 21 of them were polymorphic (95.45%. Cluster analysis divided the studied genotypes into 2 clusters, the first cluster included the two commercial cultivars Starking delicious and Golden delicious with one genotypes, while the second cluster contained the four remaining genotypes. Finally, the studied genotypes revealed high desired quantitative and qualitative traits, which assess to distribute these genotypes as new cultivars, and SSR technique was able to identify and revealed the genetic distance between the studied genotypes and commercial cultivars.INTERNATIONAL JOURNAL OF ENVIRONMENTVolume-5, Issue-2, March-May 2016, page: 98-109

  1. [A study on genotype of 271 mycobacterium tuberculosis isolates in 6 prefectures in Yunnan Province]. (United States)

    Chen, L Y; Yang, X; Ru, H H; Yang, H J; Yan, S Q; Ma, L; Chen, J O; Yang, R; Xu, L


    Objective: To understand the characteristics of genotypes of Mycobacterium tuberculosis isolates in Yunnan province, and provide the molecular epidemiological evidence for prevention and control of tuberculosis in Yunnan Province. Methods: Mycobacterium Tuberculosis isolates were collected from 6 prefectures of Yunnan province in 2014 and their Genetypes of Mycobacterium tuberculosis isolates were obtained using spoligotyping and multiple locus variable numbers of tandem repeats analysis (MLVA). The results of spoligotyping were entered into the SITVITWEB database to obtain the Spoligotyping International Type (SIT) patterns and the sublineages of MTB isolates. The genoyping patterns were clustered with BioNumerics (version 5.0). Results: A total of 271 MTB isolates represented patients were collected from six prefectures in Yunnan province. Out of these patients, 196 (72.3%) were male. The mean age of the patients was (41.9±15.1) years. The most MTB isolates were from Puer, totally 94 iusolates(34.69%). Spoligotyping analysis revealed that 151 (55.72%) MTB isolates belonged to the Beijing genotype, while the other 120 (44.28%) were from non-Beijing genotype; 40 genotypes were consisted of 24 unique genotypes and 16 clusters. The 271 isolates were differentiated into 30 clusters (2 to 17 isolates per cluster) and 177 unique genotypes, showing a clustering rate of 23.62%. Beijing genotype strains showed higher clustering rate than non-Beijing genotype strains (29.14% vs 16.67%). The HGI of 12-locus VNTR in total MTB strains, Beijing genotype strains and non-Beijing genotype was 0.993, 0.982 and 0.995 respectively. Conclusion: The Beijing genotype was the predominant genotype in Yunnan Province, the characteristics of Mycobacterium tuberculosis showed high genetic diversity. The genotyping data reflect the potential recent ongoing transmission in some area, which highlights the urgent need for early diagnosis and treatment of the infectious TB cases, to cut off the

  2. Genotyping of Hepatitis C virus isolated from hepatitis patients in Southeast of Iran by taqman realtime PCR

    International Nuclear Information System (INIS)

    Farivar, T.N.; Johari, P.


    Objectives: To check TaqMan Realtime PCR in detecting genotypes of hepatitis C virus in Iran. Methods: From July 2007 to April 2009, HCV genotyping was done on 52 patients who were referred to Research Centre for infectious Disease and Tropical Medicine, in Bou-Ali Hospital, Zahedan University of Medical Sciences. All these patients had proven hepatitis C infection. Results: Out of 52 anti HCV positive samples, 28(53.84%) had genotype 1, 2 cases (3.88 %) had genotype 2 , 12 (23.08 %) had genotype 3 and 7 (13.4 %) had genotype 4 . Mixed infection with genotypes 1 and 3 was seen in 3 cases (5.77 %). Conclusion: TaqMan probes for detecting genotyping of HCV were successful in picking genotyping of HCV infection especially those with mixed genotypes. (author)

  3. Genotype-phenotype associations in French patients with phenylketonuria and importance of genotype for full assessment of tetrahydrobiopterin responsiveness. (United States)

    Jeannesson-Thivisol, Elise; Feillet, François; Chéry, Céline; Perrin, Pascal; Battaglia-Hsu, Shyue-Fang; Herbeth, Bernard; Cano, Aline; Barth, Magalie; Fouilhoux, Alain; Mention, Karine; Labarthe, François; Arnoux, Jean-Baptiste; Maillot, François; Lenaerts, Catherine; Dumesnil, Cécile; Wagner, Kathy; Terral, Daniel; Broué, Pierre; de Parscau, Loïc; Gay, Claire; Kuster, Alice; Bédu, Antoine; Besson, Gérard; Lamireau, Delphine; Odent, Sylvie; Masurel, Alice; Guéant, Jean-Louis; Namour, Fares


    Mutations in Phenylalanine Hydroxylase (PAH) gene cause phenylketonuria. Sapropterin (BH4), the enzyme cofactor, is an important therapeutical strategy in phenylketonuria. However, PAH is a highly polymorphic gene and it is difficult to identify BH4-responsive genotypes. We seek here to improve prediction of BH4-responsiveness through comparison of genotypes, BH4-loading test, predictions of responsiveness according to the literature and types and locations of mutations. A total of 364 French patients among which, 9 % had mild hyperphenylalaninemia, 17.7 % mild phenylketonuria and 73.1 % classical phenylketonuria, benefited from a 24-hour BH4-loading test and had the PAH gene sequenced and analyzed by Multiplex Ligation Probe Amplification. Overall, 31.6 % of patients were BH4-responsive. The number of different mutations found was 127, including 26 new mutations. The mutations c.434A > T, c.500A > T, c.529G > C, c.1045 T > G and c.1196 T > C were newly classified as being BH4-responsive. We identified 261 genotypes, among which 46 were newly recognized as being BH4-responsive. Even though patients carry 2 responsive alleles, BH4-responsiveness cannot be predicted with certainty unless they present mild hyperphenylalaninemia. BH4-responsiveness cannot be predicted in patients carrying one responsive mutation only. In general, the milder the phenotype is, the stronger the BH4-response is. Almost exclusively missense mutations, particularly in exons 12, 11 and 8, are associated with BH4-responsiveness and any other type of mutation predicts a negative response. This study is the first of its kind, in a French population, to identify the phenotype associated with several combinations of PAH mutations. As others, it highlights the necessity of performing simultaneously BH4 loading test and molecular analysis in monitoring phenylketonuria patients.

  4. Increasing Genome Sampling and Improving SNP Genotyping for Genotyping-by-Sequencing with New Combinations of Restriction Enzymes. (United States)

    Fu, Yong-Bi; Peterson, Gregory W; Dong, Yibo


    Genotyping-by-sequencing (GBS) has emerged as a useful genomic approach for exploring genome-wide genetic variation. However, GBS commonly samples a genome unevenly and can generate a substantial amount of missing data. These technical features would limit the power of various GBS-based genetic and genomic analyses. Here we present software called IgCoverage for in silico evaluation of genomic coverage through GBS with an individual or pair of restriction enzymes on one sequenced genome, and report a new set of 21 restriction enzyme combinations that can be applied to enhance GBS applications. These enzyme combinations were developed through an application of IgCoverage on 22 plant, animal, and fungus species with sequenced genomes, and some of them were empirically evaluated with different runs of Illumina MiSeq sequencing in 12 plant species. The in silico analysis of 22 organisms revealed up to eight times more genome coverage for the new combinations consisted of pairing four- or five-cutter restriction enzymes than the commonly used enzyme combination PstI + MspI. The empirical evaluation of the new enzyme combination (HinfI + HpyCH4IV) in 12 plant species showed 1.7-6 times more genome coverage than PstI + MspI, and 2.3 times more genome coverage in dicots than monocots. Also, the SNP genotyping in 12 Arabidopsis and 12 rice plants revealed that HinfI + HpyCH4IV generated 7 and 1.3 times more SNPs (with 0-16.7% missing observations) than PstI + MspI, respectively. These findings demonstrate that these novel enzyme combinations can be utilized to increase genome sampling and improve SNP genotyping in various GBS applications. Copyright © 2016 Fu et al.

  5. Between and beyond additivity and non-additivity : the statistical modelling of genotype by environment interaction in plant breeding


    Eeuwijk, van, F.A.


    In plant breeding it is a common observation to see genotypes react differently to environmental changes. This phenomenon is called genotype by environment interaction. Many statistical approaches for analysing genotype by environment interaction rely heavily on the analysis of variance model. Genotype by environment interaction is then taken to be equivalent to non-additivity. This thesis criticizes the analysis of variance approach. Modelling genotype by environment interaction by non-addit...

  6. Genotyping and Bio-Sensing Chemosensory Proteins in Insects

    Directory of Open Access Journals (Sweden)

    Guoxia Liu


    Full Text Available Genotyping is the process of determining differences in the genetic make-up of an individual and comparing it to that of another individual. Focus on the family of chemosensory proteins (CSPs in insects reveals differences at the genomic level across various strains and biotypes, but none at the level of individuals, which could be extremely useful in the biotyping of insect pest species necessary for the agricultural, medical and veterinary industries. Proposed methods of genotyping CSPs include not only restriction enzymatic cleavage and amplification of cleaved polymorphic sequences, but also detection of retroposons in some specific regions of the insect chromosome. Design of biosensors using CSPs addresses tissue-specific RNA mutations in a particular subtype of the protein, which could be used as a marker of specific physiological conditions. Additionally, we refer to the binding properties of CSP proteins tuned to lipids and xenobiotic insecticides for the development of a new generation of biosensor chips, monitoring lipid blood concentration and chemical environmental pollution.

  7. Genotypic variability enhances the reproducibility of an ecological study. (United States)

    Milcu, Alexandru; Puga-Freitas, Ruben; Ellison, Aaron M; Blouin, Manuel; Scheu, Stefan; Freschet, Grégoire T; Rose, Laura; Barot, Sebastien; Cesarz, Simone; Eisenhauer, Nico; Girin, Thomas; Assandri, Davide; Bonkowski, Michael; Buchmann, Nina; Butenschoen, Olaf; Devidal, Sebastien; Gleixner, Gerd; Gessler, Arthur; Gigon, Agnès; Greiner, Anna; Grignani, Carlo; Hansart, Amandine; Kayler, Zachary; Lange, Markus; Lata, Jean-Christophe; Le Galliard, Jean-François; Lukac, Martin; Mannerheim, Neringa; Müller, Marina E H; Pando, Anne; Rotter, Paula; Scherer-Lorenzen, Michael; Seyhun, Rahme; Urban-Mead, Katherine; Weigelt, Alexandra; Zavattaro, Laura; Roy, Jacques


    Many scientific disciplines are currently experiencing a 'reproducibility crisis' because numerous scientific findings cannot be repeated consistently. A novel but controversial hypothesis postulates that stringent levels of environmental and biotic standardization in experimental studies reduce reproducibility by amplifying the impacts of laboratory-specific environmental factors not accounted for in study designs. A corollary to this hypothesis is that a deliberate introduction of controlled systematic variability (CSV) in experimental designs may lead to increased reproducibility. To test this hypothesis, we had 14 European laboratories run a simple microcosm experiment using grass (Brachypodium distachyon L.) monocultures and grass and legume (Medicago truncatula Gaertn.) mixtures. Each laboratory introduced environmental and genotypic CSV within and among replicated microcosms established in either growth chambers (with stringent control of environmental conditions) or glasshouses (with more variable environmental conditions). The introduction of genotypic CSV led to 18% lower among-laboratory variability in growth chambers, indicating increased reproducibility, but had no significant effect in glasshouses where reproducibility was generally lower. Environmental CSV had little effect on reproducibility. Although there are multiple causes for the 'reproducibility crisis', deliberately including genetic variability may be a simple solution for increasing the reproducibility of ecological studies performed under stringently controlled environmental conditions.


    Directory of Open Access Journals (Sweden)

    T. Z.


    Full Text Available The aim of the research was to conduct basic screening of new lines and cultivars of winter hexaploid triticale by the technological and molecular genetics indicators. Molecular and genetic research conducted by polymerase chain reaction allelic variants of gene loci Wx-A1, Wx-B1, and quality parameters of grain, flour and bread – on technological markers. The new cultivars and lines of winter hexaploid triticale of Nosivka Breeding and Research Station of Remeslo Myronivka Institute of Wheat by technological indicators of grain, flour and bread quality were studied. According to representative criteria’s the most promising genotypes, which are the main products in terms Forest-Steppe ecotypes’ and a high-quality raw materials for bakeries and bioethanol were identified. Molecular and genetic identifications of allelic variants of genes loci Wx-A1, Wx-B1 triticale, which in the early stages of ontogenesis to predict targeted uses genotypes were conducted. The first among a series of triticale cultivars and lines Forest-Steppe ecotypes and biotypes with nonfunctional b gene allele WxA1, which defines a high content of amylopectin of starch, an important release for more ethanol was identified. It was found that technological characteristics of grain, flour and bread of new cultivars and lines of winter triticale meet the modern requirements production dietetic food and bioenergy products is important and relevant in the context of food security of Ukraine.

  9. Hepatitis C virus genotypes in Singapore and Indonesia. (United States)

    Ng, W C; Guan, R; Tan, M F; Seet, B L; Lim, C A; Ngiam, C M; Sjaifoellah Noer, H M; Lesmana, L


    5' untranslated and partial core (C) region sequence of hepatitis C virus (HCV) in 21 Singaporean and 15 Indonesian isolates were amplified by reverse-transcription polymerase chain reaction and sequenced with the use of conserved primer sequences deduced from HCV genomes identified in other geographical regions. The HCV genotypes are predominantly that of Simmonds type 1 and less of type 2 and 3 with the latter genotype currently not detected in Indonesia. The 5' untranslated sequences are related to HCV-1. DK-7 (Denmark), US-11 (United States of America), HCV-J4, SA-10 (South Africa), T-3 (Taiwan), HCV-J6, HCV-J8, Eb-1 and Eb-8. When compared with the prototype HCV-1, insertions are found within the 5' untranslated region of Singaporean isolates and not in the Indonesians. There are Singaporean and Indonesian isolates that have sequences within the 5' untranslated region that differ slightly from each other. Microheterogeneity is observed in the core region of two Singaporeans and one Indonesian isolate. Finally, not all HCV isolates can be amplified with the conserved core sequence primers when compared with the ease with which these isolates can be amplified with 5' untranslated region conserved primers.

  10. DRD4 genotype predicts longevity in mouse and human. (United States)

    Grady, Deborah L; Thanos, Panayotis K; Corrada, Maria M; Barnett, Jeffrey C; Ciobanu, Valentina; Shustarovich, Diana; Napoli, Anthony; Moyzis, Alexandra G; Grandy, David; Rubinstein, Marcelo; Wang, Gene-Jack; Kawas, Claudia H; Chen, Chuansheng; Dong, Qi; Wang, Eric; Volkow, Nora D; Moyzis, Robert K


    Longevity is influenced by genetic and environmental factors. The brain's dopamine system may be particularly relevant, since it modulates traits (e.g., sensitivity to reward, incentive motivation, sustained effort) that impact behavioral responses to the environment. In particular, the dopamine D4 receptor (DRD4) has been shown to moderate the impact of environments on behavior and health. We tested the hypothesis that the DRD4 gene influences longevity and that its impact is mediated through environmental effects. Surviving participants of a 30-year-old population-based health survey (N = 310; age range, 90-109 years; the 90+ Study) were genotyped/resequenced at the DRD4 gene and compared with a European ancestry-matched younger population (N = 2902; age range, 7-45 years). We found that the oldest-old population had a 66% increase in individuals carrying the DRD4 7R allele relative to the younger sample (p = 3.5 × 10(-9)), and that this genotype was strongly correlated with increased levels of physical activity. Consistent with these results, DRD4 knock-out mice, when compared with wild-type and heterozygous mice, displayed a 7-9.7% decrease in lifespan, reduced spontaneous locomotor activity, and no lifespan increase when reared in an enriched environment. These results support the hypothesis that DRD4 gene variants contribute to longevity in humans and in mice, and suggest that this effect is mediated by shaping behavioral responses to the environment.

  11. Genotypic sex determination enabled adaptive radiations of extinct marine reptiles. (United States)

    Organ, Chris L; Janes, Daniel E; Meade, Andrew; Pagel, Mark


    Adaptive radiations often follow the evolution of key traits, such as the origin of the amniotic egg and the subsequent radiation of terrestrial vertebrates. The mechanism by which a species determines the sex of its offspring has been linked to critical ecological and life-history traits but not to major adaptive radiations, in part because sex-determining mechanisms do not fossilize. Here we establish a previously unknown coevolutionary relationship in 94 amniote species between sex-determining mechanism and whether a species bears live young or lays eggs. We use that relationship to predict the sex-determining mechanism in three independent lineages of extinct Mesozoic marine reptiles (mosasaurs, sauropterygians and ichthyosaurs), each of which is known from fossils to have evolved live birth. Our results indicate that each lineage evolved genotypic sex determination before acquiring live birth. This enabled their pelagic radiations, where the relatively stable temperatures of the open ocean constrain temperature-dependent sex determination in amniote species. Freed from the need to move and nest on land, extreme physical adaptations to a pelagic lifestyle evolved in each group, such as the fluked tails, dorsal fins and wing-shaped limbs of ichthyosaurs. With the inclusion of ichthyosaurs, mosasaurs and sauropterygians, genotypic sex determination is present in all known fully pelagic amniote groups (sea snakes, sirenians and cetaceans), suggesting that this mode of sex determination and the subsequent evolution of live birth are key traits required for marine adaptive radiations in amniote lineages.

  12. Selection of ectomycorrhizal willow genotype in phytoextraction of heavy metals. (United States)

    Hrynkiewicz, Katarzyna; Baum, Christel


    Willow clones are used for the phytoextraction of heavy metals from contaminated soils and are usually mycorrhizal. The receptiveness of willow clones for mycorrhizal inoculum varies specific to genotype; however, it is unknown if this might have a significant impact on their efficiency in phytoextraction of heavy metals. Therefore, a model system with mycorrhizal and non-mycorrhizal willows of two different genotypes--one with usually stronger natural mycorrhizal colonization (Salix dasyclados), and one with lower natural mycorrhizal colonization (S. viminalis)--was investigated for its efficiency of phytoextraction of heavy metals (Cd, Pb, Cu, Zn) from contaminated soil. Inoculation with the ectomycorrhizal fungus Amanita muscaria significantly decreased the biomass of leaves of both inoculated willow clones, and increased or had no effect on the biomass of trunks and roots of S. dasyclados and S. viminalis, respectively. The concentrations of heavy metals in the biomass of S. dasyclados were in general higher than in S. viminalis irrespective of inoculation with the ectomycorrhizal fungus. Inoculation with A. muscaria significantly decreased the concentration of Cu in the trunks of both Salix taxa, but did not affected the concentrations of other heavy metals in the biomass. In conclusion, stronger receptiveness of willow clones for mycorrhizal inoculum was correlated with an increased total extraction of heavy metals from contaminated soils. Therefore, this seems to be a suitable criterion for effective willow clone selection for phytoremediation. Increased biomass production with relatively constant metal concentrations seems to be a major advantage of mycorrhizal formation of willows in phytoremediation of contaminated soils.

  13. Characterization of onion genotypes by use of RAPD markers

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    Pavlović Nenad


    Full Text Available In order to estimate, at the molecular level, the divergence of parental lines that were used in diallel crossbreeding for production of superior offspring (F1 generation hybrids at the Institute for Vegetable Crops, the molecular analysis using five RAPD markers for five pairs of parents has been performed. It gives an insight into their genetic polymorphism and the possibility of their further use in breeding programs. Information from this research has pioneered the application of molecular markers of onion in Serbia. Analyses were performed using the RAPD primers, which in previous studies established a high degree of polymorphism. In all five cases there was a corresponding amplification of DNA segments. From totally 50 bands analyzed, the length of fragments ranged from 500 to 3000 bp. Number of polymorphic band per example was 8 to 13. In our research at the level of the analyzed primers, a high degree of polymorphism between analyzed genotypes has been found. Based on UPGMA dendogram, analyzed genotypes were divided into two main clusters and two subclusters.

  14. Different region analysis for genotyping Yersinia pestis isolates from China.

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    Yanjun Li

    Full Text Available BACKGROUND: DFR (different region analysis has been developed for typing Yesinia pestis in our previous study, and in this study, we extended this method by using 23 DFRs to investigate 909 Chinese Y. pestis strains for validating DFR-based genotyping method and better understanding adaptive microevolution of Y. pestis. METHODOLOGY/PRINCIPAL FINDINGS: On the basis of PCR and Bionumerics data analysis, 909 Y. pestis strains were genotyped into 32 genomovars according to their DFR profiles. New terms, Major genomovar and Minor genomovar, were coined for illustrating evolutionary relationship between Y. pestis strains from different plague foci and different hosts. In silico DFR profiling of the completed or draft genomes shed lights on the evolutionary scenario of Y. pestis from Y. pseudotuberculosis. Notably, several sequenced Y. pestis strains share the same DFR profiles with Chinese strains, providing data for revealing the global plague foci expansion. CONCLUSIONS/SIGNIFICANCE: Distribution of Y. pestis genomovars is plague focus-specific. Microevolution of biovar Orientalis was deduced according to DFR profiles. DFR analysis turns to be an efficient and inexpensive method to portrait the genome plasticity of Y. pestis based on horizontal gene transfer (HGT. DFR analysis can also be used as a tool in comparative and evolutionary genomic research for other bacteria with similar genome plasticity.

  15. The APOE Genotype in Idiopathic Normal Pressure Hydrocephalus.

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    Yi Yang

    Full Text Available Amyloid plaque has been reported in brain biopsies from patients with idiopathic normal-pressure hydrocephalus (iNPH and proposed as a significant feature of the pathophysiology. Presence of the apolipoprotein E ε4 (APOE ε4 allele is associated with increased risk of Alzheimer's disease (AD.To compare the distribution of APOE genotype in iNPH patients with an age-matched population-based control group and with Alzheimer's disease (AD patients.APOE genotype frequencies were determined in 77 iNPH patients (50 men and 27 women, mean age 71.7 years diagnosed with iNPH, a sample of 691 AD patients and 638 age-matched population controls (299 men and 339 women from the INTERGENE cohort.The APOE distribution did not differ significantly between the iNPH patients and the control population. The per e4-allele odds-ratio (OR of iNPH was given by OR = 0.90, 95% confidence interval (CI = (0.50, 1.60 that was considerably smaller than the per-allele OR of AD, OR = 5.34 (4.10, 7.00.The results suggest that the APOE-related risk of AD in patients with iNPH is not higher than in the general population.

  16. Genotyping common and rare variation using overlapping pool sequencing

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    Pasaniuc Bogdan


    Full Text Available Abstract Background Recent advances in sequencing technologies set the stage for large, population based studies, in which the ANA or RNA of thousands of individuals will be sequenced. Currently, however, such studies are still infeasible using a straightforward sequencing approach; as a result, recently a few multiplexing schemes have been suggested, in which a small number of ANA pools are sequenced, and the results are then deconvoluted using compressed sensing or similar approaches. These methods, however, are limited to the detection of rare variants. Results In this paper we provide a new algorithm for the deconvolution of DNA pools multiplexing schemes. The presented algorithm utilizes a likelihood model and linear programming. The approach allows for the addition of external data, particularly imputation data, resulting in a flexible environment that is suitable for different applications. Conclusions Particularly, we demonstrate that both low and high allele frequency SNPs can be accurately genotyped when the DNA pooling scheme is performed in conjunction with microarray genotyping and imputation. Additionally, we demonstrate the use of our framework for the detection of cancer fusion genes from RNA sequences.

  17. Molecular characterization of papaya genotypes using AFLP markers

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    Eder Jorge de Oliveira


    Full Text Available Due to the low genetic variability reported in the commercial plantations of papaya (Carica papaya L., the objective of this study was analyze the genetic diversity of 32 genotypes including cultivars, landraces, inbred lines, and improved germplasm using the AFLP technique (Amplified Fragment Length Polymorphism. The genetic distance matrix was obtained using the Nei and Li genetic distance and clustering was performed using the unweighted pair-method with arithmetic mean (UPGMA. Using 11 combinations of EcoRI/MseI primers, 383 polymorphic bands were obtained. On average, 34.8 polymorphic bands were obtained per primer combination. Five clusters were formed. The traditional cultivar 'Sunrise' and the inbred line CMF-L30-08 were the closest genotypes, and the improved germplasm (CMF041 and landrace (CMF233 the most distant. The main papaya cultivars commercially grown in Brazil, as well as four inbred lines and three improved germplasm, were clustered together, however, were not grouped in the same branch. The genetic distance between the Sunrise and Golden cultivars was 0.329, and even arising from mutation and selection within the Sunrise variety, the Golden stores considerable genetic variability. Additional variability was observed in the inbred lines derived from papaya breeding program at Embrapa Cassava and Fruits.

  18. Genotypic variation of nitrogen use efficiency in Indian mustard

    International Nuclear Information System (INIS)

    Ahmad, Altaf; Khan, Ishrat; Abrol, Yash P.; Iqbal, Muhammad


    This experiment was conducted to investigate the variation of nitrogen efficiency (NE), nitrogen uptake efficiency (UE), physiological nitrogen use efficiency (PUE) among Indian mustard genotypes, grown under N-insufficient and N-sufficient conditions. Nitrogen efficiency varied from 52.7 to 92.8. Seed yield varied from 1.14 t ha -1 to 3.21 t ha -1 under N-insufficient condition, while 2.14 t ha -1 -3.33 t ha -1 under N-sufficient condition. Physiological basis of this difference was explained in terms of nitrogen uptake efficiency and physiological nitrogen use efficiency, and their relationship with the growth and yield characteristics. While nitrogen uptake efficiency was positively correlated with plant biomass (0.793**), leaf area index (0.664*), and leaf nitrogen content (0.783**), physiological nitrogen use efficiency is positively correlated with photosynthetic rate (0.689**) and yield (0.814**). This study suggests that genotype having high nitrogen uptake efficiency and high physiological nitrogen use efficiency might help in reducing the nitrogen load on soil without any penalty on the yield. - Nitrogen efficient crop plants may help in reducing environmental contamination of nitrate without any penalty on seed yield

  19. Genotypic characterization of psittacid herpesvirus isolates from Brazil. (United States)

    Luppi, Marcela Miranda; Luiz, Ana Paula Moreira Franco; Coelho, Fabiana Magalhães; Ecco, Roselene; da Fonseca, Flávio Guimarães; Resende, Mauricio


    Thirty-six isolates of psittacid herpesvirus (PsHV), obtained from 12 different species of psittacids in Brazil, were genotypically characterized by restriction fragment length polymorphism (RFLP) analysis and PCR amplification. RFLP analysis with the PstI enzyme revealed four distinct restriction patterns (A1, X, W and Y), of which only A1 (corresponding to PsHV-1) had previously been described. To study PCR amplification patterns, six pairs of primers were used. Using this method, six variants were identified, of which, variants 10, 8, and 9 (in this order) were most prevalent, followed by variants 1, 4, and 5. It was not possible to correlate the PCR and RFLP patterns. Twenty-nine of the 36 isolates were shown to contain a 419bp fragment of the UL16 gene, displaying high similarity to the PsHV-1 sequences available in GenBank. Comparison of the results with the literature data suggests that the 36 Brazilian isolates from this study belong to genotype 1 and serotype 1. Copyright © 2015 Sociedade Brasileira de Microbiologia. Published by Elsevier Editora Ltda. All rights reserved.

  20. Gigwa-Genotype investigator for genome-wide analyses. (United States)

    Sempéré, Guilhem; Philippe, Florian; Dereeper, Alexis; Ruiz, Manuel; Sarah, Gautier; Larmande, Pierre


    Exploring the structure of genomes and analyzing their evolution is essential to understanding the ecological adaptation of organisms. However, with the large amounts of data being produced by next-generation sequencing, computational challenges arise in terms of storage, search, sharing, analysis and visualization. This is particularly true with regards to studies of genomic variation, which are currently lacking scalable and user-friendly data exploration solutions. Here we present Gigwa, a web-based tool that provides an easy and intuitive way to explore large amounts of genotyping data by filtering it not only on the basis of variant features, including functional annotations, but also on genotype patterns. The data storage relies on MongoDB, which offers good scalability properties. Gigwa can handle multiple databases and may be deployed in either single- or multi-user mode. In addition, it provides a wide range of popular export formats. The Gigwa application is suitable for managing large amounts of genomic variation data. Its user-friendly web interface makes such processing widely accessible. It can either be simply deployed on a workstation or be used to provide a shared data portal for a given community of researchers.

  1. Cervical HPV prevalence and genotype distribution in immunosuppressed Danish women

    DEFF Research Database (Denmark)

    Roensbo, Mette T; Blaakær, Jan; Skov, Karin


    INTRODUCTION: Women receiving immunosuppressive treatment due to organ transplantation are at increased risk of Human papilloma virus (HPV)-related diseases, including cervical neoplasia. This pilot study aimed to describe the cervical HPV prevalence and genotype distribution in immunosuppressed...... in 2014 had three cervical cytologies performed; one before and two after transplantation. The samples were examined for cytological abnormalities and tested for HPV using Cobas(®) HPV Test and CLART(®) HPV2 Test. RESULTS: Of 94 eligible cases we included 60 RTR and BMTR. The overall prevalence of high......-risk HPV was 15.0 (95% CI; 7.1-26.6) and the prevalence was higher among BMTR (29.4, CI; 10.3-56.0) than in RTR (9.3%, CI; 2.6-22.1) although this was not statistically significant (p=0.10). The distribution of high-risk HPV was broad with HPV 45 as the most common genotype (3.3%). The prevalences of high...

  2. Genotyping via Sequence Related Amplified Polymorphism Markers in Fusarium culmorum

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    Işıl Melis Zümrüt


    Full Text Available Fusarium culmorum is predominating causal agent of head blight (HB and root rot (RR in cereals worldwide. Since F. culmorum has a great level of genetic diversity and the parasexual stage is assumed for this phytopathogen, characterization of isolates from different regions is significant step in food safety and controlling the HB. In this study, it was aimed to characterize totally 37 F. culmorum isolates from Turkey via sequence related amplified polymorphism (SRAP marker based genotyping. MAT-1/MAT-2 type assay was also used in order to reveal intraspecific variation in F. culmorum. MAT-1 and MAT-2 specific primer pairs for mating assays resulted in 210 and 260 bp bands, respectively. 11 of isolates were belonged to MAT-1 type whereas 19 samples were of MAT-2. Remaining 7 samples yielded both amplicons. Totally 9 SRAP primer sets yielded amplicons from all isolates. Genetic similarity values were ranged from 39 to 94.7%. Total band number was 127 and PCR product sizes were in the range of 0.1-2.5 kb. Amplicon numbers for individuals were ranged from 1 to 16. According to data obtained from current study, SRAP based genotyping is powerful tool for supporting the data obtained from investigations including phenotypic and agro-ecological characteristics. Findings showed that SRAP-based markers could be useful in F. culmorum characterization.

  3. Integration of curated databases to identify genotype-phenotype associations

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    Li Jianrong


    Full Text Available Abstract Background The ability to rapidly characterize an unknown microorganism is critical in both responding to infectious disease and biodefense. To do this, we need some way of anticipating an organism's phenotype based on the molecules encoded by its genome. However, the link between molecular composition (i.e. genotype and phenotype for microbes is not obvious. While there have been several studies that address this challenge, none have yet proposed a large-scale method integrating curated biological information. Here we utilize a systematic approach to discover genotype-phenotype associations that combines phenotypic information from a biomedical informatics database, GIDEON, with the molecular information contained in National Center for Biotechnology Information's Clusters of Orthologous Groups database (NCBI COGs. Results Integrating the information in the two databases, we are able to correlate the presence or absence of a given protein in a microbe with its phenotype as measured by certain morphological characteristics or survival in a particular growth media. With a 0.8 correlation score threshold, 66% of the associations found were confirmed by the literature and at a 0.9 correlation threshold, 86% were positively verified. Conclusion Our results suggest possible phenotypic manifestations for proteins biochemically associated with sugar metabolism and electron transport. Moreover, we believe our approach can be extended to linking pathogenic phenotypes with functionally related proteins.

  4. Apolipoprotein E and presenilin-1 genotypes in Huntington's disease. (United States)

    Panas, M; Avramopoulos, D; Karadima, G; Petersen, M B; Vassilopoulos, D


    Huntington's disease (HD) is an autosomal dominant degenerative disease of the central nervous system manifested by involuntary movements (chorea), psychiatric manifestations, and cognitive impairment with a variable age at onset. This variability is mainly attributed to genetic factors. The so-called aging genes [e.g., those for apolipoprotein E (APOE) and presenilin-1 (PS-1) have been implicated in determining the age at onset of Alzheimer's disease, a disease sharing common clinical features with HD. In 60 unrelated patients suffering from HD (mean age at onset 40.1 years, range 20-65) we determined number of CAG repeats and the distribution of the APOE alleles (epsilon2, epsilon3, epsilon4) and PS-1 alleles. The results showed that: (a) The age at onset was higher in the group of patients with the epsilon4 allele (51.6 vs. 38.0 P<0.002), (b) The correlation between the age at onset and the number of CAG repeats was strong in patients with the epsilon3/epsilon3 genotype while it was not detected in patients with epsilon3/epsilon4 genotype. (c) No correlation was found between age at onset and PS-1 alleles. In conclusion, APOE seems to be a significant factor influencing the age at onset of Huntington's disease.

  5. Morphology and viability of castor bean genotypes pollen grains

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    Maria Selma Alves Silva Diamantino


    Full Text Available The objective of this work was to characterize the morphology and viability of the pollen of 15 genotypes of castor bean (Ricinus communis L. and to generate information that can assist in the selection of highly promising male parents for future use in genetic improvement programs aimed at producing seeds for oil extraction. Acetolysis and scanning electron microscopy was used to characterize the morphology of the pollen. The viability of the pollen grains was estimated by in vitro germination and colorimetric analysis (acetocarmine 2% and 2, 3, 5-triphenyltetrazolium chloride 1%. For the in vitro germination, pollen grains were grown in 10 types of solidified culture medium consisting of different concentrations of sucrose, boric acid, calcium nitrate, magnesium sulfate and potassium nitrate. The pollen grains had the following characteristics: medium size, isopolar and subspheroidal shape, radial symmetry, circular ambit, 3-colporate, elongated endoapertures, tectate exine and granulated sexine. The acetocarmine dye overestimated pollen viability. The media M5 and M8 were the most efficient at promoting the germination of pollen grains. The studied genotypes had high levels of viability and can therefore be used as male parents in genetic improvement programs.

  6. Extraction of DNA from Forensic Biological Samples for Genotyping. (United States)

    Stray, J E; Liu, J Y; Brevnov, M G; Shewale, J G


    Biological forensic samples constitute evidence with probative organic matter. Evidence believed to contain DNA is typically processed for extraction and purification of its nucleic acid content. Forensic DNA samples are composed of two things, a tissue and the substrate it resides on. Compositionally, a sample may contain almost anything and for each, the type, integrity, and content of both tissue and substrate will vary, as will the contaminant levels. This fact makes the success of extraction one of the most unpredictable steps in genotypic analysis. The development of robust genotyping systems and analysis platforms for short tandem repeat (STR) and mitochondrial DNA sequencing and the acceptance of results generated by these methods in the court system, resulted in a high demand for DNA testing. The increasing variety of sample submissions created a need to isolate DNA from forensic samples that may be compromised or contain low levels of biological material. In the past decade, several robust chemistries and isolation methods have been developed to safely and reliably recover DNA from a wide array of sample types in high yield and free of PCR inhibitors. In addition, high-throughput automated workflows have been developed to meet the demand for processing increasing numbers of samples. This review summarizes a number of the most widely adopted methods and the best practices for DNA isolation from forensic biological samples, including manual, semiautomated, and fully automated platforms. Copyright © 2010 Central Police University.

  7. The Phenotype/Genotype Correlation of Lactase Persistence among Omani Adults

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    Abdulrahim Al-Abri


    Full Text Available Objective: To examine the correlation of lactase persistence phenotype with genotype in Omani adults.Methods: Lactase persistence phenotype was tested by hydrogen breath test in 52 Omani Adults using the Micro H2 analyzer. Results were checked against genotyping using direct DNA sequencing.Results: Forty one individuals with C/C-13910 and T/T-13915 genotypes had positive breath tests (≥20 ppm; while eight of nine individuals with T/C-13910 or T/G-13915 genotypes had negative breath tests (<20 ppm and two subjects were non-hydrogen producers. The agreement between phenotype and genotype using Kappa value was very good (0.93.Conclusion: Genotyping both T/C-13910 and T/G-13915 alleles can be used to assist diagnosis and predict lactose intolerance in the Omani population.

  8. Viral fitness does not correlate with three genotype displacement events involving infectious hematopoietic necrosis virus (United States)

    Kell, Alison M.; Wargo, Andrew R.; Kurath, Gael


    Viral genotype displacement events are characterized by the replacement of a previously dominant virus genotype by a novel genotype of the same virus species in a given geographic region. We examine here the fitness of three pairs of infectious hematopoietic necrosis virus (IHNV) genotypes involved in three major genotype displacement events in Washington state over the last 30 years to determine whether increased virus fitness correlates with displacement. Fitness was assessed using in vivo assays to measure viral replication in single infection, simultaneous co-infection, and sequential superinfection in the natural host, steelhead trout. In addition, virion stability of each genotype was measured in freshwater and seawater environments at various temperatures. By these methods, we found no correlation between increased viral fitness and displacement in the field. These results suggest that other pressures likely exist in the field with important consequences for IHNV evolution.

  9. Immunogenicity of mumps virus vaccine candidates matching circulating genotypes in the United States and China. (United States)

    Zengel, James; Phan, Shannon I; Pickar, Adrian; Xu, Pei; He, Biao


    Mumps virus (MuV) causes acute infection in humans with characteristic swelling of the parotid gland. While vaccination has greatly reduced the incidence of MuV infection, there have been multiple large outbreaks of mumps virus (MuV) in highly vaccinated populations. The most common vaccine strain, Jeryl Lynn, belongs to genotype A, which is no longer a circulating genotype. We have developed two vaccine candidates that match the circulating genotypes in the United States (genotype G) and China (genotype F). We found that there was a significant decrease in the ability of the Jeryl Lynn vaccine to produce neutralizing antibody responses to non-matched viruses, when compared to either of our vaccine candidates. Our data suggests that an updated vaccine may allow for better immunity against the circulating MuV genotypes G and F. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. Measurements of experimental precision for trials with cowpea (Vigna unguiculata L. Walp.) genotypes. (United States)

    Teodoro, P E; Torres, F E; Santos, A D; Corrêa, A M; Nascimento, M; Barroso, L M A; Ceccon, G


    The aim of this study was to evaluate the suitability of statistics as experimental precision degree measures for trials with cowpea (Vigna unguiculata L. Walp.) genotypes. Cowpea genotype yields were evaluated in 29 trials conducted in Brazil between 2005 and 2012. The genotypes were evaluated with a randomized block design with four replications. Ten statistics that were estimated for each trial were compared using descriptive statistics, Pearson correlations, and path analysis. According to the class limits established, selective accuracy and F-test values for genotype, heritability, and the coefficient of determination adequately estimated the degree of experimental precision. Using these statistics, 86.21% of the trials had adequate experimental precision. Selective accuracy and the F-test values for genotype, heritability, and the coefficient of determination were directly related to each other, and were more suitable than the coefficient of variation and the least significant difference (by the Tukey test) to evaluate experimental precision in trials with cowpea genotypes.


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    Full Text Available Technological quality of 35 chosen genotypes of wheat was analysed during two years. The genotypes included 4 standards (Astella, Ilona, Samanta, Šárka and the old European Land varietes of wheat. A large amount of various genetic material was evaluated for various use. It is possible to choice the best genotypes which are exceptional for certain characteristic. Obtained results can be applied for further breeding process. Data of technological parameters are included in tables 1 and 2.

  12. Long QT syndrome genotyping by electrocardiography: fact, fiction, or something in between?

    DEFF Research Database (Denmark)

    Kanters, Jørgen K.; Graff, Claus; Andersen, Mads Peter


    Diagnosis of long QT syndrome (LQTS) is difficult. A prolonged QT interval is easily overlooked, and in 10% of all patients with LQTS, the QT interval is normal. Genotyping is unfortunately not able to detect all patients and healthy subjects correctly. Although QT prolongation is the most used r...... evaluation can serve as a guide for genotyping and can reduce the costs by suggesting which gene to start sequencing, but it is fiction that the ECG can replace genotyping....

  13. VIPER:a visualisation tool for exploring inheritance inconsistencies in genotyped pedigrees


    Paterson, Trevor; Graham, Martin; Kennedy, Jessie; Law, Andy


    Background Pedigree genotype datasets are used for analysing genetic inheritance and to map genetic markers and traits. Such datasets consist of hundreds of related animals genotyped for thousands of genetic markers and invariably contain multiple errors in both the pedigree structure and in the associated individual genotype data. These errors manifest as apparent inheritance inconsistencies in the pedigree, and invalidate analyses of marker inheritance patterns across the dataset. Cleaning ...

  14. Genotypic diversity of merozoite surface antigen 1 of Babesia bovis within an endemic population. (United States)

    Lau, Audrey O T; Cereceres, Karla; Palmer, Guy H; Fretwell, Debbie L; Pedroni, Monica J; Mosqueda, Juan; McElwain, Terry F


    Multiple genetically distinct strains of a pathogen circulate and compete for dominance within populations of animal reservoir hosts. Understanding the basis for genotypic strain structure is critical for predicting how pathogens respond to selective pressures and how shifts in pathogen population structure can lead to disease outbreaks. Evidence from related Apicomplexans such as Plasmodium, Toxoplasma, Cryptosporidium and Theileria suggests that various patterns of population dynamics exist, including but not limited to clonal, oligoclonal, panmictic and epidemic genotypic strain structures. In Babesia bovis, genetic diversity of variable merozoite surface antigen (VMSA) genes has been associated with disease outbreaks, including in previously vaccinated animals. However, the extent of VMSA diversity within a defined population in an endemic area has not been examined. We analyzed genotypic diversity and temporal change of MSA-1, a member of the VMSA family, in individual infected animals within a reservoir host population. Twenty-eight distinct MSA-1 genotypes were identified within the herd. All genotypically distinct MSA-1 sequences clustered into three groups based on sequence similarity. Two thirds of the animals tested changed their dominant MSA-1 genotypes during a 6-month period. Five animals within the population contained multiple genotypes. Interestingly, the predominant genotypes within those five animals also changed over the 6-month sampling period, suggesting ongoing transmission or emergence of variant MSA-1 genotypes within the herd. This study demonstrated an unexpected level of diversity for a single copy gene in a haploid genome, and illustrates the dynamic genotype structure of B. bovis within an individual animal in an endemic region. Co-infection with multiple diverse MSA-1 genotypes provides a basis for more extensive genotypic shifts that characterizes outbreak strains.

  15. Genetic variation of european maize genotypes (zea mays l. Detected using ssr markers

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    Martin Vivodík


    Full Text Available The SSR molecular markers were used to assess genetic diversity in 40 old European maize genotypes. Ten SSR primers revealed a total of 65 alleles ranging from 4 (UMC1060 to 8 (UMC2002 and UMC1155 alleles per locus with a mean value of 6.50 alleles per locus. The PIC values ranged from 0.713 (UMC1060 to 0.842 (UMC2002 with an average value of 0.810 and the DI value ranged from 0.734 (UMC1060 to 0.848 (UMC2002 with an average value of 0.819. 100% of used SSR markers had PIC and DI values higher than 0.7 that means high polymorphism of chosen markers used for analysis. Probability of identity (PI was low ranged from 0.004 (UMC1072 to 0.022 (UMC1060 with an average of 0.008. A dendrogram was constructed from a genetic distance matrix based on profiles of the 10 maize SSR loci using the unweighted pair-group method with the arithmetic average (UPGMA. According to analysis, the collection of 40 diverse accessions of maize was clustered into four clusters. The first cluster contained nine genotypes of maize, while the second cluster contained the four genotypes of maize. The third cluster contained 5 maize genotypes. Cluster 4 contained five genotypes from Hungary (22.73%, two genotypes from Poland (9.10%, seven genotypes of maize from Union of Soviet Socialist Republics (31.81%, six genotypes from Czechoslovakia (27.27%, one genotype from Slovak Republic (4.55% and one genotype of maize is from Yugoslavia (4.55%. We could not distinguish 4 maize genotypes grouped in cluster 4, (Voroneskaja and Kocovska Skora and 2 Hungarian maize genotypes - Feheres Sarga Filleres and Mindszentpusztai Feher, which are genetically the closest.

  16. Translation of Genotype to Phenotype by a Hierarchy of Cell Subsystems


    Yu, Michael Ku; Kramer, Michael; Dutkowski, Janusz; Srivas, Rohith; Licon, Katherine; Kreisberg, Jason F.; Ng, Cherie T.; Krogan, Nevan; Sharan, Roded; Ideker, Trey


    Summary Accurately translating genotype to phenotype requires accounting for the functional impact of genetic variation at many biological scales. Here we present a strategy for genotype-phenotype reasoning based on existing knowledge of cellular subsystems. These subsystems and their hierarchical organization are defined by the Gene Ontology or a complementary ontology inferred directly from previously published datasets. Guided by the ontology?s hierarchical structure, we organize genotype ...

  17. High Risk Human Papilloma Virus Genotypes in Kurdistan Region in Patients with Vaginal Discharge. (United States)

    Hussein, Nawfal R; Balatay, Amer A; Assafi, Mahde S; AlMufty, Tamara Abdulezel


    The human papilloma virus (HPV) is considered as the major risk factor for the development of cervical cancer. This virus is of different genotypes and generally can be classified into high and low risk types. To determine the rate of high risk HPV genotypes in women with vaginal discharge and lower abdominal pain in Kurdistan region, Iraq. Cervical swabs were taken from 104 women. DNA was extracted and the polymerase chain reaction (PCR) technique was used to determine the presence of high risk genotypes. It was found that 13/104 (12.5%) of the samples were positive for high risk HPV genotypes. Amongst those who were positive, 4/13 (30.7%) were typed as genotype 16 and 7/13 (53.8%) showed mixed genotyping. On the other hand, genotypes 53 and 56 were found in only one sample each. High risk HPV genotypes are not uncommon and further community based study is needed to determine the prevalence of HPV and its genotypes and plan for prevention of infection.

  18. Mineral Composition of Organically Grown Wheat Genotypes: Contribution to Daily Minerals Intake (United States)

    Hussain, Abrar; Larsson, Hans; Kuktaite, Ramune; Johansson, Eva


    In this study, 321 winter and spring wheat genotypes were analysed for twelve nutritionally important minerals (B, Cu, Fe, Se, Mg, Zn, Ca, Mn, Mo, P, S and K). Some of the genotypes used were from multiple locations and years, resulting in a total number of 493 samples. Investigated genotypes were divided into six genotype groups i.e., selections, old landraces, primitive wheat, spelt, old cultivars and cultivars. For some of the investigated minerals higher concentrations were observed in selections, primitive wheat, and old cultivars as compared to more modern wheat material, e.g., cultivars and spelt wheat. Location was found to have a significant effect on mineral concentration for all genotype groups, although for primitive wheat, genotype had a higher impact than location. Spring wheat was observed to have significantly higher values for B, Cu, Fe, Zn, Ca, S and K as compared to winter wheat. Higher levels of several minerals were observed in the present study, as compared to previous studies carried out in inorganic systems, indicating that organic conditions with suitable genotypes may enhance mineral concentration in wheat grain. This study also showed that a very high mineral concentration, close to daily requirements, can be produced by growing specific primitive wheat genotypes in an organic farming system. Thus, by selecting genotypes for further breeding, nutritional value of the wheat flour for human consumption can be improved. PMID:20948934

  19. Evaluating Yield and Drought Stress Indices under End Season Drought Stress in Promising Genotypes of Barley

    Directory of Open Access Journals (Sweden)

    H. Tajalli


    Full Text Available To study the effects of end season drought stress on yield, yield components and drought stress indices in barley, a split plot experiment arranged in randomized complete block design with three replications was conducted at the Agricultural Research Center of Birjand in 2008-2009 crop years. Drought stress, in 2 levels, consists of control (complete irrigation and stopping irrigation at the 50% of heading stage, and 20 promising genotypes of barley were the treatments of the experiment. Results revealed that stopping irrigation lead to declining of 14.64 and 8.12 percent of seed and forage yields against control condition, respectively. Using stress susceptibility index (SSI indicated that genotypes 2, 3, 7, 9, 10 and 15; using STI and GMP indices, genotypes 5, 8, 18 and 20 using MP, genotypes 8, 18 and 20, and TOL, genotypes 2, 3, 7, 9, and 10, were the most drought tolerant genotypes. Correlation between seed yield and stress evaluation indices showed that MP, GMP and STI are the best indices to be used in selection and introducing drought tolerant genotypes of barley. Considering all indices, and given that the best genotypes are those with high yield under normal condition and minimum yield reduction under drought stress, No. 18 and 20 could be introduced as the most tolerant barley genotypes to drought.

  20. Polymorphism of proteins in selected slovak winter wheat genotypes using SDS-PAGE

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    Dana Miháliková


    Full Text Available Winter wheat is especially used for bread-making. The specific composition of the grain storage proteins and the representation of individual subunits determines the baking quality of wheat. The aim of this study was to analyze 15 slovak varieties of the winter wheat (Triticum aestivum L. based on protein polymorphism and to predict their technological quality. SDS-PAGE method by ISTA was used to separate glutenin protein subunits. Glutenins were separated into HMW-GS (15.13% and LMW-GS (65.89% on the basis of molecular weight in SDS-PAGE. At the locus Glu-A1 was found allele Null (53% of genotypes and allele 1 (47% of genotypes. The locus Glu-B1 was represented by the HMW-GS subunits 6+8 (33% of genotypes, 7+8 (27% of genotypes, 7+9 (40% of genotypes. At the locus Glu-D1 were detected two subunits, 2+12 (33% of genotypes and 5+10 (67% of genotypes which is correlated with good bread-making properties. The Glu – score was ranged from 4 (genotype Viglanka to 10 (genotypes Viola, Vladarka. According to the representation of individual glutenin subunits in samples, the dendrogram of genetic similarity was constructed. By the prediction of quality the results showed that the best technological quality was significant in the varieties Viola and Vladarka which are suitable for use in food processing.