MGIDI-based selection and stability analysis of mungbean (Vigna radiata L. Wilczek) mutants under acidic soils using AMMI and GGE models

Abstract

In the present study, eighty-four M₃ generation mungbean mutant families along with two controls/parents were evaluated for eleven morphological traits during Zaid 2024 under acidic soils of Meghalaya. Based on phenotypic selection and MGIDI selection index ten number of superior mutant families were identified namely viz., B1-8, A2-8, A1-5, B1-1, A1-10, A2-9, B1-12, B1-11, B2-12 and B1-13. The selected mutant lines were evaluated for single plant yield (SYP) in four different locations of  Meghalaya i.e., CPGS AS- Farm (E1), NBPGR, Shillong (E2), Umeit field (E3) and COA – Experimental farm, Krydemkulai (E4) with highly acidic soil conditions pH ranging from (4.80 – 5.12).  AMMI ANOVA revealed significant differences among the mutant lines, environments and Mutant × Environment interaction and most of the variation was accounted by mutant lines (65.78%) indicating least influence of mutant and environment interaction. The mean single plant yield (SYP) of tested genotypes involving ten mutant lines along with two controls ranged from 3.12 gm Pusa 1431 (Control) to 10.37 gm in A1-10 (mutant) across the environments. The AMMI analysis revealed that mutant line A1-10 showed higher seed yield, performing well across a wide range of environments.  The mutant lines A1-10, in E1, E2 and E3, A2-8 in E1, E3 and E4 and B1 -11 in E3 were found to be highly stable and gave the highest yield in their respective mega-environments. Out of four locations E2 (NBPGR, Shillong) was the most discriminating and E3 (Farmers Field, Umeit) was the most representative to provide unbiased information about the performance of genotypes. Based on the mean versus stability graph, the mutant A1-10 stands out because of simultaneous high yield and high stability.