Authors : M. A. BARATE, V. S. GIRASE, V. B. RAJMANE ANDSHWETA DEOKAR
Page Nos : 14-16
Description :
Mungbean genotypes were evaluated for thirteen yield and yield contributing characters to study the genetic diversity existing among them by using Mahalnobis D2 statistic. The analysis of data revealed the significant difference among the genotypes for all the characters. D² values between all possible pairs of sixty genotypes ranged from 4.96 (LCM-4 and LCM-20) to 926.78 (LCM-26 and LCM-55). Based on genetic distance (D2 value), sixty genotypes were grouped into seven clusters indicating wider genetic diversity in the germplasm collections of mungbean from different geographical origin. Out of seven clusters, cluster I was the largest with forty-five genotypes, followed by cluster VI, III and II with six, four and two genotypes respectively, the cluster II, IV and V were monogenotypic. The clustering pattern indicated the absence of relationship between genetic diversity and geographical origin of genotypes. Maximum inter cluster distance was observed between cluster III and V (D2 =25.25), while lowest divergence was noticed between cluster II and IV (D2 = 4.44). Whereas, maximum intra-cluster distance was observed for cluster VII (D2 =11.83). Cluster V exhibited highest means for seed yield per plant.Among the thirteen characters studied, the seed shattering (56.50 %.) contributed maximum for divergence, followed by 100 seed weight (31.98%)and least by plant height (0.17%). The seed shattering behavior of 60 genotypes showed 8 resistant, 23 tolerant and 29 susceptible. On the basis of inter-cluster means, per se performance, the following genotypes viz., LCM-25 , LCM-35, LCM-43, LCM- 47, LCM-56, LCM-46, LCM-32, LCM-23, LCM-17, LCM-34, LCM-7, LCM-48, LCM-38 may be used in breeding programme for further improvement of grain yield in mungbean under climate change.
