Studies on Genetic Divergence and Breeding Potential of Bottle Gourd (Lagenaria Siceraria Molina Standi.) Genotypes Using D2 Analysis

摘要

The present experiment was conducted to study the nature and magnitude of genetic diversity of twenty three bottle gourd genotypes obtained from NBPGR, Hyderabad. 24 bottle gourd genotypes, in which 23 genotypes were obtained from NBPGR, Hyderabad andalong with one check variety i.e. Pusa Naveen which were sown in Randomized Block Design (RBD) with three replications in spring summer of 2012. Based on D analysis, the genotypes were grouped into five different clusters, where as the cluster III possessed maximum number (11) of genotypes followed by the cluster IV (8) and cluster I (3). The maximum inter cluster distance was observed between the clusters II and V and that of minimum in between the clusters III and IV. In case of intra cluster distance, the maximum distance was observed in cluster EI and that of zero was observed solitary clusters like cluster II and V. Considering cluster mean, the genotypes of cluster II followed by cluster I recorded highest mean for yield per vine and other yieldattributing traits. Therefore, Selection of superior genotypes in view point of desirable traits, with high genetic distance could be selected for hybridization programmes and recognition of best genotypes for different traits to produce new elite recombinants in bottle gourd.