Genetic variability and character association studies in cauliflower (Brassica oleracea var. botrytis L.) under subtropical conditions of Himachal Pradesh
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Date
2021-10-20
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College of Horticulture and Forestry Neri, Hamirpur (H.P.)
Abstract
The present investigation entitled “Genetic variability and character association studies in cauliflower (Brassica oleracea var. botrytis L.) under subtropical conditions of Himachal Pradesh” was carried out during the year 2020-2021 at Experimental Research Farm, Department of Vegetable Science, College of Horticulture and Forestry, Neri, Hamirpur (H.P). Twenty seven genotypes including check variety Palam Uphar were evaluated for twenty one horticultural traits viz., leaf length, plant height, number of leaves/plant, days to curd initiation, stalk length, curd diameter, curd depth, curd size index, gross plant weight, marketable curd weight per plant, days to curd maturity, yield per plot, harvesting index, TSS, dry matter content, incidence of disorder, disease severity, color of curd at maturity, curd compactness, plant growth habit and blanching habit in Randomized Complete Block Design with three replications to estimate the extent of variability, heritability and genetic advance, correlation and path coefficient analysis for yield and other horticultural traits. Analysis of variance showed significant differences among all the genotypes with respect to the characters studied. The genotypes UHF-CAU-M-15 (6.70 kg) was recorded superior over the check Palam Uphar (6.32kg) in terms of the trait yield per plot followed by UHF-CAU-M- 14(6.23kg). Moderate GCV and PCV values were exhibited by the characters viz., days to curd initiation, number of leave, stalk length, curd size index, gross plant weight, marketable curd weight per plant. High heritability along with high genetic advance was observed in days to curd maturity, number of leaves per plant, days to curd initiation, stalk length, curd size index, gross plant weight, marketable curd weight per plant. The correlation studies at genotypic and phenotypic levels revealed that marketable curd weight per plant had significant and positive correlation with leaf length, plant height, number of leaves per plant, curd diameter, curd depth, curd size index, gross plant weight, total soluble solids and dry matter content. Path analysis studies revealed that positive and direct effect on the dependent character marketable curd weight per plant was registered by the independent traits like curd diameter, number of leaves per plant, leaf length, total soluble solids, days to curd maturity, stalk length, gross plant weight.