Abstract

Genotype × environment interaction is a crucial aspect of identifying and selecting adaptable, stable, and high-yielding potato genotypes that exhibit lower incidence of late blight disease. Twenty-eight potato genotypes, five parents and a check hybrid were tested using randomized complete block design with three replications under three different environments. Analysis of variance revealed significant differences in the studied traits, indicating substantial genetic variability among the genotypes. According to the Eberhart and Russell Stability method, G10, G17 and G21 were identified as adaptable and stable genotypes. The PC1 of the AMMI bi-plot indicated that genotypes G10, G17 and G21 were high-yielding and exhibited lower incidence of late blight disease. Additionally, PC2 suggested that G8, G10 and G12 were consistent in tuber yield, while G10, G11, G17 and G23 were found to be stable against late blight. It was concluded from the study that the G23 produced the highest (38.376 tons ha-1) tuber yield coupled with highest percentage (80.3%) of disease tolerance. In addition, G17 also performed exceptionally with yield potential (38.15 tons ha-1) and disease tolerance (76.7%). Overall, these two genotypes were declared as the most adaptable and stable. Higher tuber production with lower incidence to disease percentage was found in Battakundi environment. Therefore, assessment of such potato hybrids in various environments can exploit more potential for yield and yield attributing traits in upcoming breeding strategies. These useful strategies will be helpful in identifying and choosing the most favorable environments for potato production, not only to contend with original requirements but also to support the large-scale food availability and sustainability.