AMMI Model Analysis of Stability and Adaptability of Late Duration

Abstract: Multilocation yield trials on late duration (106-125 days) finger millet genotypes were conducted under early and late transplanting at Bhubaneswar and early direct-sown condition at Berhampur for three years 2004-2006, during kharif season. G×E interaction analysis of grain yield in AMMI (Additive Main and Multiplicative Interaction) model showed differential interaction of the genotypes in the 3 planting conditions. IPCA-1 explained 93 % of G×E interaction. AMMI G×E interaction study showed that OEB 56, OEB 71 and VR 822 had high mean and positive interaction, while PES 110 had high mean and very low interaction. On basis of AMMI II predicted yield, the genotypes OEB 56 and OEB 71 were better suited for early transplanting at Bhubaneswar and early direct-sown condition at Berhampur indicating that the genotype would be suitable for early cropping, but not late cropping. The genotype PES 110 showed better adaptation to both early and late transplanting conditions at Bhubaneswar, indicating that the genotype is suitable for transplanting condition and not for direct-sown condition. Six other genotypes showed specific adaptation to single environment only, of which Chilika ranked first under late transplanting at Bhubaneswar and VR 822 ranked first under early direct-sown condition at Berhampur, indicating specific adaptation. Key words: Finger millet G×E interaction AMMI analysis Adaptability Stability INTRODUCTION yield data of multilocation varietal trials. It not only give