Phenotypic stability in upland cotton (Gossypium hirsutum)

A study was conducted during 1996-97 to evaluate 9 upland cotton (Gossypium hirsutum L.) genotypes along with check variety 'LRA 5166' for stability i n 4 agronomically different environments, pooled analysis revealed signific ant differences among the cultivars, environments and environment (linear) for seed cotton yield suggesting the presence of genetic variability in the cultivars, difference in environments under investigation and their predom inant effect on yield. The genotype x environment interaction was highly si gnificant suggesting that the genotypes interacted considerably with the en vironment in the expression of yield. The linear component of V x E was non -significant, indicates the genotypes responded non-linearly to the change in environment. The stability analysis for individual genotype showed 'GISC 86/58' was more stable for seed cotton yield followed by 'GJHS 34'.