Evaluation of Diverse Greengram Genotypes for Seed Yield Stability under Acidic Soils by AMMI and GGE Biplots Analysis

Background: The objective of this study was to identify potential greengram genotypes for breeding in the acidic soils of the North East Hill Region (NEHR) by quantifying the effects of genotype × environment interaction (GEI) and to determine seed yield stability among the genotypes. Methods: Thirty-two greengram genotypes were tested under three acidic soil locations for five seasons, using randomized block design with three replications. The data collected was analyzed for variability among the genotypes for the traits plant height, days to maturity, number of pods per plant, pod length, seeds per pod and seed yield per plant followed by stability analysis for seed yield per plant using biplot analysis of genotype plus genotype × environment interaction (GGE) and additive main effects and multiplicative interaction (AMMI) models. Result: Variability was observed among the genotypes for seed yield and its component traits. Significant genotype, environment and G × E interaction was found in all the 32 genotypes seed yield per plant in pooled and AMMI anova. Thirty-two genotypes mean seed yield ranged from 2.52 gm Pusa 1431 (G21) to 4.66 gm Pusa 1031 (G3) across the environments. Genotype (Pusa 1031 (G3) exhibited seed yield (4.66 gm) higher than mean seed yield of (3.51 gm) with adaptability for the environment E1 (ICAR NEH farm), E4(NBPGR farm) and E5 (CPGS-AS farm). The NBPGR farm (E4) was shown to be the most suitable site for the potential expression of higher seed yield in the genotypes. The genotypes Pusa 1031 (G3) and Ganga-1 (G28) are stable and high yielding across the locations according to the stability analysis results.