GENETIC VARIABILITY FOR YIELD AND QUALITY TRAITS IN CAULIFLOWER (Brassica oleracea var. botrytis L.)
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Date
2018-06-29
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Genetic variability for yield and quality traits in
cauliflower (Brassica oleracea var. botrytis L.)” was carried out at Vegetable Research Farm,
Department of Vegetable Science, Dr YS Parmar University of Horticulture and Forestry, Nauni,
Solan (HP) during Rabi season, 2017-18. The experiment was laid out in RCBD with three
replications comprising of twenty diverse genotypes of cauliflower including PSBK-I as check
variety. The observations were recorded on various characters viz., days to marketable curd maturity
from date of transplanting, number of leaves per plant, leaf size index, plant height, stalk length, gross
plant weight, marketable curd per plant, harvest index, yield per hectare, curd depth, curd size index,
curd solidity, plant growth habit, leaf protection to curd, curd colour, riceyness, stalk rot incidence
and black rot severity. Analysis of variance revealed significant differences among genotypes for all
the characters under study. Genotypes viz., White Rock, Improved Majestic, Champion, Cambridge
No.5, Kt-25, White Heart and Perfection Improved were found promising in terms of yield and
quality contributing characters and performed significantly better than check variety. Genotypes viz.,
Autumn King, Muktamani, White Rock, Summer Wonder and Early Snowball were earliest in
maturity. In total, six genotypes were found to have snow white curds while ten were found to have
white curds. Majority of the genotypes under study were found to have either erect or semi erect plant
growth habit. Regarding riceyness, among the twenty germplasms studied, seventeen genotypes were
found to produce non ricey curds. High estimates of heritability coupled with moderate values of
genetic gain were found in the traits like stalk length, number of leaves per plant, gross plant weight,
marketable curd per plant and plant height. Correlation studies revealed that marketable curd per plant
was positively and significantly associated with gross plant weight, curd solidity, curd size index, curd
depth and leaf size index whereas negative and significant association was observed with days to
marketable curd maturity. The path coefficient analysis depicted that curd solidity had the maximum
positive direct effect on marketable curd per plant. The genetic divergence study depicted that the
maximum inter cluster difference is in between the Cluster I and II.
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