Comparação de métodos para descrição de adaptabilidade e estabilidade fenotípica de genótipos de feijão-caupi

Abstract

This study aimed to evaluate the adaptability and phenotypic stability of cowpea genotypes in different environments in the state of Mato Grosso do Sul, by means of methods proposed by Eberhart and Russell (1966), Lin and Binns (1988) modified Carneiro (1998), Annicchiarico (1992), Cruz, Torres and Vencovsky (1989) and AMMI and correlate the parameters of adaptability and stability of the methodologies used. The experiments were carried out from February to July 2010, 2011 and 2012 in Aquidauana, Chapadão do Sul and Dourados, totaling 8 environments, each environment was characterized by the combination of location x year of cultivation. The experimental design was randomized with 4 replications and 20 treatments (genotypes of cowpea) blocks. The methods are similar as to the ordering of genotypes, however differ in explanation and accurate information about the genotype by environment interaction. The AMMI method allows more accurately identify superior genotypes for adaptability and stability and more suitable environments for the simultaneous selection of these two factors. Genotypes adaptability and gathered enough to recommend to the state of Mato Grosso do Sul, yield stability were MNC03-737F-5-1, BRS-Tumucumaque, BRSGuariba, MNC02-684F-5-6, MNC03-725F-3, MNC02-682F-2-6, BRS-Cauame, BRSItaim and MNC03-737F-5-11. Eberhart and Russell, Lin and Binns and AMMI can be used in a complementary way to better predict the behavior of genotypes.