AMMI and GGE Biplot analyses to comprehend genotype × environment interactions in mungbean (Vigna radiata L. Wilczek)
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Date
2022-10
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CCSHAU, Hisar
Abstract
Twenty four mungbean (Vigna radiata L. Wilczek) genotypes were evaluated over 12 environments to comprehend the basis of adaptive response for yield and its components in different environments using AMMI model and to find the association between genotypes, traits and trait x environment interactions using the GGE biplot technique. Significant variations were observed for environment, genotype and G x E interaction (GEI) for all the traits across all the environments. High GCV and high heritability coupled with high genetic advance for seed yield, 100-seed weight, harvest index and biological yield suggested that direct selection would rewarding for improvement of mungbean genotypes for these traits. Estimates of correlation and path coefficients revealed that seed yield per plot is significantly contributed by the biological yield, harvest index and 100-seed weight. Stability model of Eberhart and Russel (1966) identified the genotypes MH 1801, MH 1830, MH 1871 and MH 1874 as most stable for seed yield and MH 1431 for early maturity. High magnitude of variation due to GEI for all the traits across all the environments through AMMI analysis indicated considerable variable response of GEI toward the tested genotypes. AMMI analysis further indicated that summer season of Hisar and both seasons of Karnal (Uchani) could be considered as favorable environments while, both seasons of Sirsa as unfavorable environments for seed yield, harvest index and number of pod and overall, the summer season could be considered as favorable for seed weight. the genotypes viz., MH 1801, MH 421, MH 1850, MH 1142, MH 1890, MH 318 and MH 1772 were found high
yielding and broadly adaptable to all the environments on the basis of AMMI analysis. The genotype selection index of AMMI analysis confirmed genotypes MH 1890, MH 1772, MH 1801, MH 1850, MH 1762 and MH 1142 as highly stabile for higher seed yield and more number of pods. The GGE biplot depicted that the genotypes MH 1772, MH 1890, MH 1801, MH 1830, MH 1831, MH 318 and MH 18-100 were most stable across all environments for high seed yield and more number of pods while the genotypes MH 1314, MH 318, MH 1801, MH 421 and MH 1890 divulged stability for early maturity. The GGE biplot portrayed environment E9 (SuS21) and E4 (KhS20) as „ideal‟ test environments for seed yield, number of pods and number of branches; E12 (KhK21) for harvest index and E1 (SuH20) for seed weight, number of seeds and early flowering and maturity, to identify the desirable genotypes with maximum stability. On the basis of Multi-trait stability index, the genotypes MH 1703, MH 1830, MH 1142 and MH 1871were found most stable across the environments.