Quantitative Traits Loci
Mostrando 1-12 de 150 artigos, teses e dissertações.
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1. Mapping QTLs for drought tolerance in a SEA 5 x AND 277 common bean cross with SSRs and SNP markers
Abstract The common bean is characterized by high sensitivity to drought and low productivity. Breeding for drought resistance in this species involves genes of different genetic groups. In this work, we used a SEA 5 x AND 277 cross to map quantitative trait loci associated with drought tolerance in order to assess the factors that determine the magnitude of
Genet. Mol. Biol.. Publicado em: 23/10/2017
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2. Genome selection in fruit breeding: application to table grapes
ABSTRACT Genomic selection (GS) has recently been proposed as a new selection strategy which represents an innovative paradigm in crop improvement, now widely adopted in animal breeding. Genomic selection relies on phenotyping and high-density genotyping of a sufficiently large and representative sample of the target breeding population, so that the majority
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-04
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3. Linkage disequilibrium, SNP frequency change due to selection, and association mapping in popcorn chromosome regions containing QTLs for quality traits
Abstract The objectives of this study were to assess linkage disequilibrium (LD) and selection-induced changes in single nucleotide polymorphism (SNP) frequency, and to perform association mapping in popcorn chromosome regions containing quantitative trait loci (QTLs) for quality traits. Seven tropical and two temperate popcorn populations were genotyped for
Genet. Mol. Biol.. Publicado em: 2016-03
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4. Epistasis interaction of QTL effects as a genetic parameter influencing estimation of the genetic additive effect
Epistasis, an additive-by-additive interaction between quantitative trait loci, has been defined as a deviation from the sum of independent effects of individual genes. Epistasis between QTLs assayed in populations segregating for an entire genome has been found at a frequency close to that expected by chance alone. Recently, epistatic effects have been cons
Genet. Mol. Biol.. Publicado em: 2013
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5. Fine mapping and single nucleotide polymorphism effects estimation on pig chromosomes 1, 4, 7, 8, 17 and X
Fine mapping of quantitative trait loci (QTL) from previous linkage studies was performed on pig chromosomes 1, 4, 7, 8, 17, and X which were known to harbor QTL. Traits were divided into: growth performance, carcass, internal organs, cut yields, and meat quality. Fifty families were used of a F2 population produced by crossing local Brazilian Piau boars wit
Genet. Mol. Biol.. Publicado em: 2013
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6. Regressão aleatória na detecção de QTL para características de crescimento de suínos / Random regression to detect QTL for growth traits in swine
Muitos estudos são voltados para a busca de QTL (locos de características quantitativas) que afetam características de crescimento em suínos, sendo que a quase totalidade tem encontrado QTL com efeitos significativos. No entanto, a maioria destes estudos utiliza informações referentes a peso corporal em idades específicas ou ganho de peso médio. Dess
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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7. Método de Haseman-Elston e suas modificações no estudo de genes controladores de característica quantitativa / Haseman-Elston methodology and modifications on the study genes underlining quantitative trait loci
QTL mapping allows to study loci that play a role in complex traits, as well to determine their chromosomal locations. For this purpose, a set of methods useful for the study of quantitative traits are those based on Haseman-EIston regression, that is quite used in human genetics. These are robustness regression methods for linkage analysis that can be used
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/01/2012
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8. 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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9. 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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10. 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
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11. Estudos de locos de características quantitativas, de expressão gênica e teste de paternidade em suínos / Studies of quantitative trait loci, genic expression and of paternity testing in pigs
The accomplishment of the present study had as objective: 1) to map Quantitative Trait Loci (QTL) on chromosomes 1, 2, 3, 12, 14, 15 and X in a F2 pig population developed by mating two Brazilian Piau breed sires with 18 dams from a commercial line (Landrace × Large White × Pietrain); 2) investigate the level of expression of candidate genes influencing ec
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/09/2010
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12. Mapping QTLs for traits associated with biological nitrogen fixation (BNF) in soybeans / Mapeamento de QTLs para caracteres relacionados com a fixação biológica de nitrogênio (FBN) em soja
Soybeans [Glycine max (L.) Merrill] is a crop with high protein content (about 40%) in the seeds. As a result, the crop demands high nitrogen (N) inputs, which can be supplied by the process of biological nitrogen fixation (BNF), through the symbiosis with bacteria of the genus Bradyrhizobium. In Brazil the BNF allows to fulfill all the demand for N; therefo
Publicado em: 2010