AMMI Analysis of G X E Interaction in Finger Millet Genotypes for Yield Stability and Adaptability

Abstract

Multilocation yield trials on fifteen early duration finger millet (Eleusine coracana Gaertn.) genotypes were conducted under early and late transplanting condition at Bhubaneswar and early direct sown condition at Berhmpur for three years during kharif season. G X E interaction analysis of grain yield in AMMI (Additive Main and Multiplicative Interaction) model showed differential interaction of the genotypes in three planting conditions. IPCA-1 explained 66.5% of G X E interaction. AMMI I biplot of G X E interaction showed that RAU 8, DM 7, SRS 2 and BM 107-2 had high mean and moderate negative interaction effects, while Bhairabi and Neelachal had high mean and small positive interaction effects. AMMI biplot showed differential interaction of the genotypes in different environmental conditions. On the basis of AMMI II predicted yield, the genotypes SRS 2 and RAU 8 would be better adapted to all planting conditions. Genotype Bhairabi would be suited for early cropping, but not late cropping. The genotype DM 7 would be best suited for transplanting condition and not for the direct seeded condition. BM 107-2 would be best suited for late transplanting, while Neelachal would be best suited for the direct seeded condition, indicating their specific adaptation.