OAR@ICRISATGenetic Divergence under Three Environments in a Minicore Collection of Chickpea (Cicer arietinum L.) S GParameshwarappaauthorP MSalimathauthorH DUpadhyayaauthorS SPatilauthorS TKajjidoniauthorTwo hundred and three germplasm lines of minicore collections obtained from ICRISAT, Hyderabad were evaluated for eight quantitative traits under three environments viz. E1 (rainfed 2004–05), E2 (rainfed 2005–06) and E3 (irrigated 2005–06). Mahalanobis' D2 statistic was applied. These genotypes were grouped into 20, 16 and 25 clusters in E1, E2 and E3, respectively. In the present study in all the three environments, the genotypes of different geographic origin were randomly distributed in the clusters. Thus, there is no parallelism between the genetic distance and geographical diversity. The formation of 16, 10 and 18 distinct solitary clusters in E1, E2 and E3, respectively may be due to intensive natural or human selection for diverse adaptive gene complex. The pairs of clusters revealing maximum genetic diversity were identifi ed for all the three environments. It has been suggested that for varietal improvement the hybridization among the genotypes of divergent clusters should be done rather than depending on those genotypes of the cluster having minimum divergence. Genotypes of cluster XIX (ICC13124) had the highest mean value for pod number and earliness in E1. In E2, the genotypes of cluster XV (ICC12654) and XVI (ICC9848) were superior in respect of plant height, pods/plant and 100 seedweight, respectively. In E3, the genotype of cluster XVI (ICC13124) had the highest mean value for seed yield. Cluster XXIII (ICC6279) had the early maturing genotype and cluster XVIII (ICC5879) was superior in respect of pod number and tertiary branches/plant and cluster V(ICC 6816), cluster XI (ICC10341 and cluster XIII (ICC5504) had the tall genotypes. Therefore, these genotypes may be involved in multiple crossing programme to recover transgressive segregatesChickpea2011Indian Society of Plant Genetic ResourcesArticle

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