Genotype X Environment Interaction, Adaptability and Yield Stability of Rice Genotypes of North East India

Present experiment was carried out to determine the agronomic performances of thirty two rice genotypes across three locations in India (North East) in two consecutive years. The objective was to interpret genotype-environment (GE) interactions and determine stable genotypes by using Eberhart -Russell and Additive Main effect and Multiplicative Interaction (AMMI) model. The first two principal component axes (PCA 1 and 2) cumulatively contributed to more than 95% of the total genotype by environment interaction. A biplot generated using genotypic and environmental scores of the first two AMMI components also showed that genotypes with larger PCA 1 and lower PCA 2 scores gave high yields (stable genotypes), and genotypes with lower PCA 1 and larger PCA 2 scores had low yields (unstable genotypes), as in the sites tested. Genotypes viz., RCPL 1–160, RCPL 1–300 and RCPL 1–145 were found high yielding across all environments.