Abstract
A population of 95 RILs in generation F 9, from a cross of BARC-8 and Garimpo, provided the plant material studied. This population was grown at two sites: Vicosa and Sao 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 interac tion RIL x site was significant. The heritability of protein content was high at both sites as well as in the joint analysis. Herita bilities 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 hi correlation with the total protein content, while 7S protein presented a low correlation to the total protein content.
Highlights
Soybean seeds contain more protein than any other commercially used plant species
Soybean meal is the main by-product of the crush industries in Brazil, most of which is assigned for exportation
This study is part of the soybean quality breeding program developed at the Instituto de Biotecnologia Aplicada à Agropecuária - BIOAGRO/Universidade Federal de Viçosa (UFV), which aims at the development of productive varieties with high protein content and the following objectives: (i) estimation of the heritability of the total protein concentration in soybean, evaluated by the modified Kjeldahl method; (ii) estimation of the heritability of the soybean storage protein concentration and of its respective subunits, evaluated by polyacrylamide gel electrophoresis in denaturing condition (SDS-PAGE) together with densitometry, (iii) estimation of the genotypic correlations to each one of these traits, and (iv) evaluation of the interaction genotype x environment for these traits
Summary
Soybean seeds contain more protein than any other commercially used plant species. Approximately 40% of the soybean seed dry weight is proteins and 20% oil. This study is part of the soybean quality breeding program developed at the Instituto de Biotecnologia Aplicada à Agropecuária - BIOAGRO/UFV, which aims at the development of productive varieties with high protein content and the following objectives: (i) estimation of the heritability of the total protein concentration in soybean, evaluated by the modified Kjeldahl method; (ii) estimation of the heritability of the soybean storage protein concentration and of its respective subunits, evaluated by polyacrylamide gel electrophoresis in denaturing condition (SDS-PAGE) together with densitometry, (iii) estimation of the genotypic correlations to each one of these traits, and (iv) evaluation of the interaction genotype x environment for these traits.
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