Genotype x environments interactions for grain yield and its components in urdbean (Vigna mungo L Wilczek) under rainfed conditions of Jammu region

In the present study, AMMI approaches were used to analyse the genotype x environment interactions and stability under targeted environments. The analysis of stability parameters of seed yield/plant in 25 genotypes of urdbean (Vigna mungo L,) indicated that six genotypes namely, Mash 479, PLU 499-52, PU19, PLU-4158, Pant 31 and IPU2-43 showed regression coefficient greater than unity (b-1) with nonsignificant S²di values and higher mean values than population mean which exhibited their stability and adaptation to specific favorable environment only. Three genotypes, PU99, No. 13/11 and No.40 indicated that regression coefficient less than unity with higher mean values than population mean with non-significant deviation from the regression coefficient (S²di) and recommended for unfavorable environments. Mash 338 and IPU 96-1 are the most stable genotypes across the environments for seed yield/plant and 1000 seed weight, respectively. Environmental indices indicated that environment (E₁) and environment (E₂) were the most favorable for number of primary branches/plants, days to 50% flowering, plant height and seed yield/plant, whereas environment (E₃) was favorable for pod length and number of seeds/pod. AMMI 1 model exhibited that E₁ and E₂ were the clustered in the same group and exhibited similar type of interaction for seed yield/plant. Genotypes, PLU4158, IPU96-1, Mash479, PLU499-52 and IPU2-43 exhibited high IPCA 1 scores along with high population mean. Based on AMMI 2 model, PLU4158, IPU96-1 and IPU96-6 exhibited high IPCA scores. The selected genotypes may be utilized in Vigna mungo improvement programme in targeted location with true type of breeding lines.