Browsing by Author "SHILPA, M. L."
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ThesisItem Open Access STUDIES ON GENETIC VARIABILITY AND DIVERGENCE FOR YIELD AND YIELD ATTRIBUTING CHARACTERS IN DOLICHOS BEAN (Dolichos lablab L.)(University of Agricultural and Horticultural Sciences, Shivamogga (Mudigere), 2020-11-18) SHILPA, M. L.; Dr. SRINIVASA, V; Dr. DEVARAJUAn investigation was undertaken on genetic variability studies in dolichos bean genotypes in the experimental block of the Department of Vegetable Science, College of Horticulture, Mudigere, during 2019-2020. The experiment was laid out in Randomized Complete Block Design with two replications. Analysis of variance revealed that highly significant differences among the genotypes were noticed for most of the characters under the study. High heritability coupled with high genetic advance as per cent of mean was recorded for plant height at harvest, number of leaves per plant at harvest, days to first flowering, days to 50 per cent flowering, number of flowers per cluster, pod length, pod width, pod thickness, number of pods per cluster, number of pods per plant, average pod weight, average green seed weight, pod yield per plant, pod yield per plot, pod yield per hectare and shelling percentage, which clearly illustrates that these characters are under the influence of additive gene action. Thus, there is a bountiful scope for improving these attributes through direct selection. Correlation studies exhibited that pod yield per plant showed a significant and positive correlation with the number of pods per plant, average pod weight, number of seeds per pod, pod length, number of flowers per cluster and number of pods per cluster. Path analysis revealed that pod yield per plant had a direct and positive effect on plant height at harvest, days to first flowering, number of pods per plant, pod weight, green seed weight, pod length and pod thickness. Based on D2 analysis, 30 genotypes of dolichos bean were grouped into six clusters. Among the characters studied, pod yield per plant contributed maximum (79.52 %) to the genetic diversity followed by shelling percentage (6.44 %) and number of pods per cluster (6.21 %). Based on the mean performance, genotypes such as Arka Sambram, Arka Jay, GLB-379, CHES DB-31 and CHES DB-04 have been identified as promising genotypes for higher yield, which can be exploited for the further crop improvement programme under the hill zone of Karnataka.