Evaluation of genetic divergence existing in the rice germplasm collections
Anand Singh, Anushka Singh, PK Singh
The present investigation was conducted during Kharif2017-18 at the Central research station (Masodha, Faizabad) and lab experiments were conducted in Seed Testing Laboratory, Seed Technology Section, N. D. University of Agriculture and Technology, Narendra Nagar (Kumarganj), Faizabad (U.P.) India. The experimental materials of studies comprised of twenty seven Rice varieties/ lines/ genotypes excluding three check varieties viz., NDR97, Baranideep and Shushk Samrat these varieties were procured from genetic stock available in Rice section, Department of genetics and Plant Breeding, N. D. University of Agriculture and Technology, Narendra Nagar (Kumarganj), Faizabad (U.P.) India. The non-hierarchical Euclidean cluster analysis was employed to study the genetic diversity existing among 30 rice germplasm collections on the basis of 14 quantitative and qualitative characters. The pseudo F-test revealed that 6 clusters arrangement was most appropriate for grouping the 30 genotypes therefore the 30 genotypes were accepted to the group into 6 non overlapping clusters the distribution of 30 rice line in 6 clusters is presented in the investigation. It indicated the existence of high degree of genetic diversity present in the genotypes. Therefore, these genotypes may serve as valuable source for selection of diverse parents. Maximum intra-cluster distance was found for cluster III (4.685), followed by cluster VI (1.673). Crosses should be made between these widely related genotypes located in intra and inter cluster distances. Seed yield showed high contributions towards total genetic divergence. The contribution of eleven characters in genetic divergence showed variation whose highest contribution was given by Yield per plant (72.41%) followed by 1000-seed weight (9.89%) and days to maturity (7.36%) and minimum contribution was given by no. of tiller per plant, germination percentage, panicle length and harvest index, rest of the characters very low average contribution towards genetic divergence.