Genetic Diversity Analysis in Promising Germplasm Lines of Lathyrus (Lathyrus sativus L.)

摘要

Genetic divergence. among 60 Lathyrus genotypes (Lathyrus sativus L.) comprising of 4 exotic and 56 indigenous representing different eco-geographic origin was assessed using Mahalanobis D-2 statistics. The genotypes were grouped into fifteen clusters. The D-2 values of the different strains ranged between 1.05 to 132.20 and inter cluster distance ranged from 2.00 to 6.17. Maximum numbers of genotypes were found in cluster XI (8), XIII (7), V and IX (6). The cluster wise number of genotypes groupedare-I(2), II (4), III (4),IV (2),VI (2), VII (4), VIII (2), X (1), XII (3), XIV (4) and XV (5). All the clusters had indigenous genotypes except cluster. VIII, while cluster XII had both the exotic and indigenous genotypes. The genotypes falling in cluster XIII had the maximum divergence followed by cluster VIII and XV The maximum and minimum divergence was revealed between cluster VIII and I and between cluster XIII and II, respectively. The cluster IV and X. showed higher mean values for most of thecharacters, while cluster 1, III, V, VII and XIV had lower mean values for most of the characters. From the results of the present study, genotypes falling in divergent clusters. may be selected and used in Lathyrus improvement programme.