Quantitative genetic analysis of storage proteins in soybean

Abstract

A population of 95 RILs in generation F9, from a cross of BARC-8 and Garimpo, provided the plant material studied. This population was grown at two sites: Viçosa and São Gotardo, both in the State of Minas Gerais, Brazil. Environmental factors are involved in the regulation of the expression of the evaluated traits at both sites, since the interaction RIL x site was significant. The heritability of protein content was high at both sites as well as in the joint analysis. Heritabilities of the other evaluated traits were also high at both sites. However, the heritabilities of these traits were lower in the joint analyses, due to the effect of the interaction RIL x site. 11S protein and total storage protein (11S+7S) had a positive and high correlation with the total protein content, while 7S protein presented a low correlation to the total protein content.