Genotype x Environment interaction effects on yield of rice hybrids in India

Abstract

Performance of improved, high yielding varieties of rice over different agro ecological regions of India has been well documented by several workers. But the performance evaluation of rice hybrids which are recently evolved in India is yet to be assessed through multilocation trials. The objective of the present investigation was to analyse the pattern of Genotype x Environment Interaction for grain yield by Additive Main Effects and Multiplicative Interaction (AMMI) model using the data generated from a National Hybrid Rice Trial (NHRT) conducted over eleven locations in India involving 16 hybrids and two inbred check varieties. Results indicated a significant Genotype x Environment Interaction (GEl) that influenced the relative ranking of the hybrids across the locations. It was evident from AMMI analysis that genotype, environment and the first principal component of interaction effect accounted for 86.96% of treatment sum of squares and that the first five principal components of the interaction effect were found to be significant. The usefulness of the Procedure in selecting genotypes for general or specific adaptation is also brought out.