Stability analysis of grain yield and yield attributing traits in urdbean under irrigated environments

Genotype-environment interactions are of major consequence to the breeders in the process of development of improved varieties. Several superior cultivars of urdbean have been developed, although due to G × E interactions, the majority of them exhibit uneven performance under varying environments. The present investigation was conducted during Kharif seasons of 2018, 2019 and 2020 at Research Farm, SKUAST-J, Chatha, to assess stability of 14 diverse urdbean (Vigna mungo L.) genotypes for 13 grain yield and yield attributing traits underirrigated conditions of Jammu region. Genotype x environment interactions were found to be significant for all the traits, suggesting that grain yield was inconsistent under irrigated conditions. The analysis of stability parameters for grain yield per plant implied that PU 1503 and PU 1510 had higher means than general mean paired with regression coefficient greater than unity and non-significant S²d_i values which demonstrated their stability and adaptation to certain favorable environments only. Genotypes PU 1501 and PU 1512 were observed to be the most stable genotypes across the environments for number of clusters per plant. Genotype PU1503 was found to be stable for number of pods per cluster and PU 1504 was found to be stable for number of seeds per pod. These specified genotypes may be effectively used for future Vigna mungo breeding programmes.