Data/hora: 13/06/2024 02:46:11

Provedor de dados: | 74
País: | Brazil
Título: | Epistasis interaction of QTL effects as a genetic parameter influencing estimation of the genetic additive effect
Autores: | Bocianowski,Jan.
Data: | 2013-01-01
Ano: | 2013
Palavras-chave: | Additive gene action effect; Barley; Doubled haploid lines; Epistasis; QTL.
Resumo: | 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 considered by many researchers as important for complex traits. In order to understand the genetic control of complex traits, it is necessary to clarify additive-by-additive interactions among genes. Herein we compare estimates of a parameter connected with the additive gene action calculated on the basis of two models: a model excluding epistasis and a model with additive-by-additive interaction effects. In this paper two data sets were analysed: 1) 150 barley doubled haploid lines derived from the Steptoe x Morex cross, and 2) 145 DH lines of barley obtained from the Harrington x TR306 cross. The results showed that in cases when the effect of epistasis was different from zero, the coefficient of determination was larger for the model with epistasis than for the one excluding epistasis. These results indicate that epistatic interaction plays an important role in controlling the expression of complex traits.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100013
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572013000100013
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.36 n.1 2013
Fonte: | info:eu-repo/semantics/openAccess