Abstract

Selection for wide adaptability and high phenotypic stability of Brazilian soybean genotypes

Author(s): V.M. Oliveira, O.T. Hamawaki, A.O. Nogueira, L.B. Sousa, F.M. Santos and R.L. Hamawaki

Advances in genetic enhancement techniques have led to an increase in soybean production. Thus, soybean is currently one the most economically important cultured species worldwide. The objectives of the present study were to study the interaction of soybean genotypes per environment in terms of grain productivity and to evaluate their phenotypic adaptability and stability, with the final aim of selecting lineages with high productivity, wide adaptability, and high stability. Seven soybean genotypes, consisting of five lineages developed by the soybean genetic enhancement program of the Universidade Federal de Uberlândia (Brazil) and two controls, were evaluated during several annual cycles in seven different environments. A randomized complete block design (RCBD) with three replicates was adopted in each site. This study followed the methodologyproposed by Eberhart and Russel and Lin and Binns, with modifications byCarneiro, and the AMMI (additive main effects and multiplicative interactionmodel) analysis. The average productivity of soybean cultivars in the trials was 2739.26 kg/ha. The L01V13 genotype and the UFUS Guarani cultivarhad wide adaptation according to the methodology proposed by Eberhartand Russel and Lin and Binns, with modifications by Carneiro. Whenanalyzed with the AMMI model, the UFUS Guarani cultivar showed highstability. In general, the methodologies studied are complementary and,when used together, increase the reliability of the classification, providingsupport for the use of specific soybean cultivars in different environments.

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