Vol. 12, Issue 7 (2023)

Author(s):
Himanshi, Khajan Singh, PK Prem Meena, Rajesh Kumar and DL Yadav

Abstract:
The present investigation was conducted in an augmented randomized complete block design during kharif, 2022 with 190 mutant genotypes of urdbean varieties (Pratap Urd -1 and CO-6 treated with three doses of gamma radiation i.e., 200 Gy, 300 Gy and 400 Gy) including three check varieties viz., CO-6, Pratap Urd-1 and Kota Urd-3 and 13 component characters were studied for genetic diversity by using D² statistics. The genotypes were grouped into 14 distinct non-overlapping clusters, cluster Ⅵ had maximum of 40 genotypes followed by cluster Ⅲ contain 33 genotypes, cluster Ⅴ contain 24 genotypes, cluster Ⅰ and cluster Ⅱ contain 16 genotypes each while, the cluster ⅩⅢ contain single genotype only. Cluster Ⅷ had maximum intra-cluster distance. Inter-cluster distance was highest between cluster Ⅺ and ⅩⅢ followed by cluster ⅩⅢ and ⅩⅣ, cluster Ⅳ and ⅩⅢ, cluster Ⅸ and ⅩⅢ, cluster Ⅱ and ⅩⅢ, indicating efficient breeding program can be undertaken to improve productivity and other yield attributes by selecting superior genotypes in segregating generation.