AMMI and GGE Biplot Analysis of Multi-environmrnt Seed Yield Data in Cluster Bean [Cyamopsis tetragonoloba (L.) Taub.

Abstract

Background: Cluster bean is a drought tolerant, warm season legume crop, cultivated mainly as a rain fed crop in arid and semi-arid regions of India. The productivity of guar seed is low as it is cultivated in varied and harsh environments so development of new varieties with stable performance over environments as well as identification of discriminative environments for proper testing of cultivars is absolutely essential. Methods: In the present study, 13 guar genotypes developed by pedigree method of breeding at Pulses Research Station, SDAU, S.K.Nagar were evaluated for yield performance during kharif 2020, at eight different locations. Pooled analysis of variance and stability analysis was performed by AMMI and GGE biplot. Result: The results of pooled analysis indicated the presence of significant G x E interaction (GEI) for seed yield and hence the data was subjected to stability analysis. From stability analysis, it was evident that the genotypes viz., G8, G4, G2 and G5 were with high mean values for the trait concerned and exhibited less variation over environments whereas other genotypes had a greater variation with the environment. Among the environments, E7 (VIJ)) was found to be the best test environment having high discriminative ability and representativeness for selecting generally adapted genotypes.