Vol. 11, Issue 12 (2022)

Author(s):
Namita Borah, Akashi Sarma, Debojit Sarma, Abhilash Bhattacharjee and Dibosh Bordoloi

Abstract:
Genetic diversity of the twenty-one genotypes of pigeon pea was accessed for fourteen characters in a randomized block design (RBD) with three replications at ICR farm, Assam Agricultural University during Kharif 2017-18. Among the twenty-one genotypes in the sample, two were from BNCA, AAU (Biswanath Chariali College of Agriculture, Assam Agricultural University, Jorhat), while the other nineteen were from ICRISAT, Hyderabad. The analysis of divergence was carried out by the D² statistic of Mahalanobis (1936) and Tocher’s method followed for cluster formation as described by Rao (1952). Twenty-one genotypes were grouped into 4 clusters. The highest number of genotypes were found in Cluster I (13) followed by Cluster II (6) and Cluster III (1) and Cluster IV (1). The average intra-cluster distance was maximum in Cluster II (45.02) followed by Cluster I (36.96). The maximum inter-cluster distance was found between Cluster I and Cluster IV (151.74) followed by Cluster II and IV (75.19). The highest intra-cluster distance was observed for cluster II. Hence, genotypes belonging to this cluster viz. Local 1, ICP 14930, ICP 11613, ICP 11639, ICP 10920, and ICP 15312 may be utilized as parents in future breeding programmes.