Adaptability and stability with multivariate definition of macroenvironments for wheat yield in Rio Grande do Sul

Abstract: The objective of this work was to evaluate the adaptability, stability, and environmental stratification wheat (Triticum aestivum) grown in 20 environments, state Rio Grande do Sul, Brazil. experiments were performed during four crop years, five growing regions, considering distinct environments. In presence genotype x environment (GxE) interaction, additive main effects multiplicative interaction analysis (AMMI) method used. This combines variances genotypes environments with GxE obtained scores are displayed biplot graphs, using principal component analysis. stratified by factor analysis, macroenvironments defined according grain yield behavior. patterns adaptability phenotypic stability for 'BRS 327', 331', 'Fundacep Raízes', 328', Guamirim' through multivariate biometric approaches AMMI definition is intrinsic peculiarities year there similarity between municipalities Santo Augusto, Cachoeira São Luiz Gonzaga, as well Sul Gabriel.