|Department of Genetics and Plant Breeding,
University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
*University of Agricultural Sciences (GKVK), Bengaluru - 560 065, Karnataka, India
|In the present study, 121 linseed genotypes consisting of high yielding linseed varieties from NBPGR, Germplasm Exchange Division, New Delhi, University of Agricultural Sciences Raichur, Karnataka and CSK Himachal Pradesh Krishi Vishwavidyalaya, Palampur, H.P. These germplasm lines were raised at MARS Dharwad during rabi 2012 to identify diverse genotypes. They were evaluated for eight yield and yield attributing characters using D2 analysis, to study the diversity pattern among the genotypes. Based on the analysis, the genotypes were grouped into 15 clusters. Maximum number of 36 and 34 genotypes were grouped under cluster I and II respectively, while cluster IV, III and VI having 21, 14 and 4 genotypes respectively. Cluster VIII and XV had two genotypes each. Further clusters V, IX, X, XI, XII, XIII and XIV were found to have one genotype each. Maximum inter cluster D2 value was observed between cluster III and cluster VIII (55.87) followed by cluster VII and VIII (55.01). The greater the distance between the two clusters indicates wider the genetic diversity between genotypes. Hence, the genotypes in cluster III viz EC-1543,EC-1475, EC-41762, IC-53294, SURBHI, IC-96559, EC-41623, IC-53279, IC-53291, EC-41755, HIM ALSI-2, IC-96594, HIM ALSI-1 and IC-53292 had wider diversity with varieties PKV and NL-97 in cluster VIII. These lines may be utilized in further breeding programme for the exploitation of maximum hybrid vigour. The intra cluster distance was maximum in cluster IV (D = 12.32), followed by cluster III (D = 11.27) and cluster II (D = 11.1) indicates hybridization involving genotypes within the same clusters may result in good cross combinations. Among the ten traits studied, maximum contribution was made by number of capsule per plant in each genotype showed highest contribution (41.09%) followed by oil yield per plant, (16.35%), 1000 seed weight (13.02%), seed yield per plant (11.07%). Hence, number of capsule per plant, oil yield per plant, 1000 seed weight and seed yield per plant contributed 81.53 percent towards total divergence. Therefore, these characters may be given importance during hybridization programme.