Estratificação ambiental e análise da adaptabilidade de linhagens elite de algodão via método FGGA

Abstract

This study was conducted to evaluate the effects of genotype x environment interaction, estimate the adaptability of cotton genotypes and perform clustering environments, through FGGA method (Analysis of factors associated with the effects of genotype x environment interaction and genotypic). They used data obtained from the breeding program of Embrapa Cotton (CNPA), for the 16 cotton genotypes in 8 locations (environments) distributed in Mato Grosso. analysis of individual and joint variance were performed, then the analysis of adaptability through FGGA method. Regarding the proportion of the catch of GE interaction in the first two axes, the method used allowed to explain 70% of the variation. From the results, it is suggested the formation of two mega-environments formed by A1, A4, A5 and A8 and A7 and the environments. G2 genotypes (CNPA GO 2000-1167), G4 (FMT 701), G5 (FM 993) and G14 (CNPA MT 04 2080) are widely adapted to the environments evaluated. While the technique demonstrated FGGA be easy to interpret, facilitating the Mega-environments training and also the recommendation of genotypes with wide adaptability.