Cotton is a cash crop which contributes avalueaddition in the economy of Pakistan. The 65 genotypes were tested in 14 unique environments (areas) through a graphical approach of GGE biplot to decide the mega environment/s. The GGE biplot was made by plotting the scores of genotypes and environments of PC1 against their respective scores of second principal component (PC2). The GGE biplot of mega-environmental investigation comprises of the sporadic polygon that links the genotypes with each other and lines that draw from the center of biplot and meet with polygon at right edges.
Keywords: GGE biplot, multivariate analysis, cotton, Genotype x environment interaction