Adaptabilidade e estabilidade de genótipos de feijão-caupi via REML/BLUP e GGE-Biplot

Abstract

Several methodologies have been proposed with the purpose of estimating the influence of the interaction genotypes x environments on the various characters of interest. Among these, the mixed models via REML / BLUP and GGE-Biplot have been highlighted to identify superior genotypes and stratify environments. The use of environmental information can be useful to find the factors that are in the real difference between the genotypes. The objective of this study was to compare statistical methodologies for the analysis of the adaptability and stability of cowpea genotypes in cultivation and use value assays. The experiments were carried out from March to July 2016 and 2017, in the municipality of Dourados, and in 2017 also in Aquidauana. A randomized complete block design was used, with 14 genotypes and four replicates, 12 advanced strains and two commercial cultivars. After detecting the significant interaction between genotypes and environments, the adaptability and phenotypic stability of the cowpea genotypes were analyzed by the GGE-Biplot and REML / BLUP methods. The two methods were concordant in 80% in the identification of the best genotypes. The genotypes Goldfinch 1-5-4, Goldfinch 1-5-10 and Goldfinch 1-5-7 were the genotypes that simultaneously presented high grain yield, adaptability and stability. thus indicated for cultivation in Mato Grosso do Sul.