Heritability estimation in early generations of two-way crosses in soybean

Bragantia

Marcelo Marchi Costa²  Antonio Orlando Di Mauro¹  Sandra Helena Unêda-trevisoli¹  Nair Helena Castro Arriel¹  Ivana Marino Bárbaro¹  Gustavo Dias Silveira²  Frando Romero Silva Muniz² 

[1] ,UNESP Faculdade de Ciências Agrárias e Veterinárias Programa de Pós-graduação em Agronomia (Genética e Melhoramento de Plantas)Jaboticabal SP

关键词: Glycine max;    heritability coefficient;    parent-offspring regression;    quantitative traits;    Glycine max;    coeficiente de herdabilidade;    regressão pai-filho;    caracteres quantitativos;   

DOI  :  10.1590/S0006-87052008000100012

来源: SciELO

【 摘 要 】

The estimation of genetic parameters, especially in early generations, is very useful for directing the selection process in breeding programs. The present research was undertaken to estimate heritabilities in the broad sense, narrow sense and using parent-offspring regression in F3 soybean populations from six two-way crosses, originated from the Soybean Breeding Program of Faculdade de Ciências Agrárias e Veterinárias (UNESP), Jaboticabal campus. It was used the family design with common checks located ten plots apart. It was observed highly significant differences among families. The experimental coefficient of variation (CVe), the CVg/CVe ratio and the heritability showed wide variation among traits, being the highest values found for number of pods, number of seeds and grain yield, making evident the existence of variance to be exploited by breeding. The estimation of the heritability coefficients in the broad sense, narrow sense and by regression were close in most of the situations, showing that the largest part of genetic variance is of additive nature, in which simple selection methods can lead to satisfactory genetic gains.

【 授权许可】

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