Study on genotype x environment interactions and AMMI analysis for agronomic traits in mungbean (Vigna radiata L. Wilczek.) under rainfed conditions.

Abstract

In the present study, 23 genotypes of mungbean were evaluated for stability performance under different environments continuously for three years during kharif 2016 (E1), 2017 (E2) and 2018 (E3) under rainfed conditions. Genotype Pusa Vishal exhibited regression coefficient equal to unity with non-significant deviation from regression coefficient and hence showed wider adaptability under poor or good environments. Genotype EC520016 showed earliness in maturity with wider adaptability. Environmental indices indicated that environment E2 and E3 were most favourable for yield and majority of yield attributing traits, whereas E3 alone was important for seed yield/plant and number of seeds/ pod. Based on AMMI models, Pusa Vishal, PD139, IPM2-3, IPM2057 and PML2-14 showed higher IPCA scores coupled with high population mean in E3. AMMI2 analysis indicated ML2056, and K851 with high IPCA1 in E3 whereas IPM99-125, BM63 and PM2-14 with high IPCA2 in the same environment. Genotypes which positioned very close to centre point and are least effected by G x E interactions while those presented away from the point of centre are more affected by G x E interactions and hence not stable. Identified genotypes may be utilized in improvement programme of Vigna radiata for targeted environments.