Phenotypic stability for grain-yield in mungbean (vigna radiata L. wilczek)

Phenotypic stability for grain-yield was studied for ten mungbean genotypes under seven environments. Significant differences among the genotypes and environments for grain-yield indicated a great deal of variability among the genotypes as well as environments under study. Both predictable (linear) and unpredictable (non-linear) portion of genotype environment interaction (GEl) were found to be equally important for determining the stability of yield. The regressions (bi) were not significantly different from linearity therefore, stability of the individual genotype was predicted on the basis of mean yield performance (xi) and deviation from regression (S/sup 2/di). The genotypes M-6 and YC-3960 (A 88) were found to be the most stable and high yielders. The genotypes VC 3960 (A 89) and NM 98 had also high yield-potential but these were better responsive to favourable environments. (author)