Stability Analysis in Maize (Zea Mays L.) for Yield and Its Component Characters using Ammi Approach

Forty five F1 hybrids evolved by half diallel mating, involving 10 inbreeds were used to estimate stability, for three yield related traits. The AMMI model, which had both additive and multiplicative effects, had been applied for the data. The analysis of variance for stability revealed that, the mean squares were significant for genotypes, environments, G x E interactions, PCA I, PCA II, PCAIII and PCA IV, for all the three traits of interest. Among the genotypes, thirty four genotypes recorded significantly superior mean performance, for grain yield per plant over all environments. Among the high mean performing genotypes, six genotypes viz., RML27 x RML42, RML1 x RML48, RML26 x RML27, RML26 x RML36, RML23 x RML27 and RML12 x RML23, recorded high interaction, twenty six genotypes, with the positive and negative type of interaction with the environment were noticed. Among the environments, E1 recorded low interaction. The environments E5 and E6 recorded positive type of interaction, while E3 and E1 recorded negative type of interaction. Among the genotypes, forty six genotypes recorded significantly, superior mean performance for grain yield per plot, in overall environments. Among the high mean performing genotypes, nine genotypes viz., RML36, RML1xRML48, RML36xRML37, RML23xRML27, RML1xRML23, RML26, RMLxRML26, RML12xRML23 and RML34xRML37 recorded high interaction, thirty genotypes with the positive and negative type of interaction, with the environment were noticed. Among the environments, E6 recorded high interaction. The environments E6 and E3, recorded positive type of interaction, while E4 recorded negative type of interaction.