Phenotypic variability and divergence studies in lentil (Lens culinaris Medik.)
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Date
2007
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Publisher
SKUAST-K
Abstract
Thirty three genotypes of lentil (Lens culinaris Medik.), alongwith two checks viz., Precoz and Shalimar Masur-1, were studied for yield and yield component traits to obtain information on magnitude of variability and divergence during rabi 2006-07 across two locations namely Experimental Farm of Division of Plant Breeding and Genetics, Shalimar (E-1) and Pulse Research Sub-station, Habak (E-2) in RBD with 3 replications at each location. Analysis of variance revealed presence of significant variability among these genotypes for all the traits. G x E interaction was also significant, revealing that genotypes did not perform equally across the two locations. Heritability estimates (b.s.) were high for all the traits. High heritability along with maximum genetic gain (% of mean) was recorded for seed yield plot-1 (60.91), 100-seed weight (52.51), number of pods (49.11) and secondary branches plant-1 (42.48). Seed yield plot-1 showed positive significant association with number of primary branches plant-1, number of secondary branches plant-1, plant height, number of pods plant-1 and number of seeds pod-1 and negative association with protein content. Path analysis revealed that maximum positive direct contribution to seed yield plot-1 came from pods plant-1 (0.674) followed by 100-seed weight (0.624), primary branches (0.350) and seeds pod-1 (0.324). Significant positive indirect contribution came from all the traits (except 100-seed weight) via pods plant-1. Analysis of divergence, in 33 lentil genotypes using Mahalanobis D2 statistics revealed high significance, while these genotypes got grouped into eight and seven clusters in E-I and E-II, respectively but in pooled analysis these genotypes were grouped into six clusters with cluster I having 17 genotypes, cluster-II (6), cluster-III (3), cluster-IV (5) and rest of the clusters were monogenotypic. Inter-cluster distance was maximum between cluster V and VI (32.09) in E-I, Cluster-III and VI (42.53) in E-II and cluster II and IV (31.53) in pooled analysis. The maximum contribution to divergence came from 100-seed weight (38-43%) followed by seed yield plot-1 (30-35%) in both the environments and data pooled over the environments.
Description
M.Sc Thesis submitted to SKUAST Kashmir
Keywords
Lentil, variance, heritability, Genetic and Plant Breeding