Adaptabilidade e estabilidade produtiva em genótipos de feijão-preto

Abstract

The present work aimed to evaluate the adaptability and productive stability of black bean genotypes in seven environments, in the state of Pernambuco, according to the methodologies of Lin and Binns and AMMI. The experiments were carried out in 2011 in Araripina, São João, Belém de São Francisco, Petrolina and Caruaru; and in 2012, in the municipalities of Belém de São Francisco and Petrolina, with each environment being determined by the combination of location x year of cultivation. The experimental design was randomized blocks, with three replications. The experimental plot consisted of four rows of four meters in length, the two central rows (4 m2) being the useful area for obtaining yield data. The methodologies differed regarding the ordering of genotypes, also differing in terms of explanation, precision and information about the interaction between genotypes by environments. The Lin and Binns method simultaneously characterized the genotypes for adaptability and stability using only the Pi indicator, while the AMMI methodology explained most of the G x E interaction in the first two CPIs and allowed to identify more precisely genotypes superior in adaptability and stability. and environments more suitable for the simultaneous selection of these two factors. The cultivars BRS Esplendor (G14) and BRS Campeiro (G1) showed the highest productivity averages, being classified as having wide adaptability and high stability. The CNFP 15194 (G10) and CNFP 15177 (G6) genotypes obtained above-average productivity and positive interaction with the A2 environment (Municipality of São João, year 2011), which was classified by the AMMI method as one of the most stable environments for production. of black beans in Pernambuco. The Lin and Binns methodology associates greater stability with greater productivity and the AMMI provides the verification of specific adaptability genotype recommendation.