Phenotypic Stability For Grain Yield in Pearl Millet

The genotype-environment interaction was studied for six females, sixteen pollinator parents and their 96 F, hybrids alongwith three checks for grain yield under three environments. Both predictable (linear) and unpredictable (non-linear) portions of gxe interactions were found to be significant for heterozygous (hybrids) and homozygous (parents) populations. The magnitude of predictable portion was relatively higher among parents whereas in hybrids' it was almost equal. Stability id general appeared to be a property of the individual genotype as even for significant unpredictable gxe interaction, prediction could be made in respect of many genotypes. There was lack of association between bi and S2 di and xi and S2di both in homozygous and heterozygous populations which indicated that independent genetic systems controlled these parameters.