GENETIC DIVERGENCE IN GREENGRAM (yigna radiata (L.) Wilczek)
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Date
1997
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Professor Jayashankar Telanagana State Agricultural University
Abstract
Genetic parameters like genetic divergence, correlations and path analysis were studied on 26 genotypes of greengram for the following characters viz., plant height, number of clusters per plant, :number (us pods per plant, pod length, number of seeds per pod, lOO—seed weight, seed yield per plant, total biomass per plant, harvest index and protein content.
Based on the multivariate analysis, the 26 genotypes were grouped into six clusters. The magnitude of D2 values indicated the presence of considerable diversity in the material studied. The pattern of distribution of genotypes from different geographical regions into various clusters was at random, indicating that geographical isolation may not be the only factor causing genetic
diversity. Protein content, lOO—seed weight, number of clusters per plant, plant height and seed yield per plant contributed considerably to the expression of genetic divergence. These five characters are more potent factors for differentiation among the genotypes of greengram studied. Seed yield was positively and significantly associated with number of pods per plant, number of clusters per plant, total biomass per plant and harvest index. It ‘was further observed that number of pods per plant, number of clusters per plant, total biomass per plant and harvest index were positively associated among themselves and also with yield. The upath coefficient analysis indicated that selection can be practiced for number of pods per plant, total biomass per plant and harvest index. These characters exhibited positive direct effect along with positive correlation on yield.
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D5362