Studies on genetic divergence over environments in mungbean (Vigna radiata (L.) Wilczek)

Forty nine mungbean genotypes were studied in three environments (kharif, rabi uplands, and rabi rice fallows) to understand the genetic diversity and study the influence of genotype-environment interactions. Considerable genetic diversity was recorded in the material studied. Clustering pattern of the genotypes was influenced by the environment. The genotypes studied fell into 14,11 and 8 clusters in the three environments, respectively, indicating the importance of studying the material in more than one environment. No relation between geographic diversity and genetic diversity was observed. The parentage had no effect on the clustering pattern except in rice fallows. Shoot dry weight at harvest and pods/plant were the common characters differentiating the clusters in all the environments. Based on per se performance and intercluster distances, LGG 424 and LGG 442 were considered to be genetically diverse parents and may be used in hybridization to achieve rare recombinants and transgressive segregates.