Qtl Mapping
Mostrando 13-24 de 197 artigos, teses e dissertações.
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13. Mapeamento Bayesiano de múltiplos caracteres: efeitos pleiotrópicos no estudo da herança dos componentes da produção em milho / Bayesian mapping of multiple traits: pleiotropic effects in studying the inheritance of yield components in maize
Pleiotropy has played an important role in understanding quantitative traits. However, the extensiveness of this effect in the genome and its consequences for plant improvement have not been fully elucidated. The aim of this study was to identify pleiotropic quantitative trait loci (QTL) in maize using Bayesian multiple interval mapping. Additionally, we sou
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/01/2012
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14. Model selection for quantitative trait loci mapping in a full-sib family
Statistical methods for mapping quantitative trait loci (QTLs) in full-sib forest trees, in which the number of alleles and linkage phase can vary from locus to locus, are still not well established. Previous studies assumed that the QTL segregation pattern was fixed throughout the genome in a full-sib family, despite the fact that this pattern can vary amon
Genetics and Molecular Biology. Publicado em: 13/07/2012
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15. Comparative mapping reveals quantitative trait loci that affect spawning time in coho salmon (Oncorhynchus kisutch)
Spawning time in salmonids is a sex-limited quantitative trait that can be modified by selection. In rainbow trout (Oncorhynchus mykiss), various quantitative trait loci (QTL) that affect the expression of this trait have been discovered. In this study, we describe four microsatellite loci associated with two possible spawning time QTL regions in coho salmon
Genetics and Molecular Biology. Publicado em: 2012
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16. Demarcation of informative chromosomes in tropical sweet corn inbred lines using microsatellite DNA markers
A study of genetic variation among 10 pairs of chromosomes extracted from 13 tropical sweet corn inbred lines, using 99 microsatellite markers, revealed a wide range of genetic diversity. Allelic richness and the number of effective alleles per chromosome ranged from 2.78 to 4.33 and 1.96 to 3.47, respectively, with respective mean values of 3.62 and 2.73. A
Genetics and Molecular Biology. Publicado em: 2012
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17. Mapeamento de QTLs em múltiplos caracteres e ambientes em cruzamento comercial de cana-de-açucar usando modelos mistos / Multi-trait multi-environment QTL mapping in a sugarcane commercial cross using mixed models
Dados coletados de experimentos de melhoramento geralmente contêm observações fenotípicas para vários caracteres avaliados em múltiplos ambientes. Especificamente para cana-de-açúcar, medidas repetidas são obtidas para cana-planta e uma ou mais socas. Tal cenário presta-se naturalmente ao uso de modelos mistos para modelagem de variâncias genétic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2011
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18. Mapeamento de QTL (Quantitative Trait Loci) associados à resistência do maracujá-doce à bacteriose / QTL mapping related to resistance of sweet passion fruit to bacterial blight
O maracujá-doce (Passiflora alata Curtis) é uma espécie nativa no Brasil. Seu cultivo tem crescido nos últimos anos devido a sua valorização no mercado in natura e seus usos na fitoterapia. Entretanto, os cultivos comerciais enfrentam problemas devido a ocorrência da bacteriose (Xanthomonas axonopodis pv. passiflorae). O patógeno é endêmico no paí
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/07/2011
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19. Zero-inflated Poisson regression models for QTL mapping applied to tick-resistance in a Gyr x Holstein F2 population
Nowadays, an important and interesting alternative in the control of tick-infestation in cattle is to select resistant animals, and identify the respective quantitative trait loci (QTLs) and DNA markers, for posterior use in breeding programs. The number of ticks/animal is characterized as a discrete-counting trait, which could potentially follow Poisson dis
Genetics and Molecular Biology. Publicado em: 28/10/2011
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20. Genetic parameters for body weight, carcass chemical composition and yield in a broiler-layer cross developed for QTL mapping
The objective of this study was to estimate genetic and phenotypic correlations of body weight at 6 weeks of age (BW6), as well as final carcass yield, and moisture, protein, fat and ash contents, using data from 3,422 F2 chickens originated from reciprocal cross between a broiler and a layer line. Variance components were estimated by the REML method, using
Genetics and Molecular Biology. Publicado em: 17/06/2011
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21. Quantitative trait loci (QTL) mapping for growth traits on bovine chromosome 14.
Quantitative trait loci (QTL) mapping in livestock allows the identification of genes that determine the genetic variation affecting traits of economic interest. We analyzed the birth weight and weight at 60 days QTL segregating on bovine chromosome BTA14 in a F2 resource population using genotypes produced from seven microsatellite markers. Phenotypes were
Genetics and Molecular Biology. Publicado em: 2011
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22. Mapping and stability of QTLs for seed weight in common beans under different environments.
The objectives were: 1 - to identify, under different environments, RAPD markers linked to loci that control the 100 seed weight of common beans; 2 - to evaluate the existence of interactions involving QTL's with planting dates and locations; 3 - to compare detection procedures of markers linked to QTL's utilizing the methods of mapping and multiple regressi
Crop Breeding and Applied Biotechnology. Publicado em: 2011
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23. Estudo de uma população segregante (F1) de maracujá-doce: enriquecimento do mapa de ligação e mapeamento de QTL para produção e qualidade de frutos / A study of a sweet passion fruit segregating population (F1): enrichment of the linkage map and QTL mapping for yield and fruit quality
A cultura do maracujá-doce (Passiflora alata Curtis, 2n = 18) não apresenta expressão comercial como à do maracujá-amarelo. No entanto, por se tratar de uma frutífera relativamente nova nos mercados, com grande potencial de expansão devido ao seu valor agregado, há necessidade de se realizarem estudos genéticos e de melhoramento visando a sua expans
Publicado em: 2011
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24. Quantitative trait loci mapping for meat quality traits in swine chromosome 6.
Realizou-se o mapeamento de QTL no cromossomo 6 suíno (SSC6), associado às características de qualidade da carne. Um total de 557 animais de uma população F2 foi obtido do cruzamento entre dois machos da raça nativa brasileira Piau e 18 fêmeas comerciais, cujos genótipos foram obtidos para 13 marcadores microssatélites. As características avaliadas
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2011