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Please use this identifier to cite or link to this item: http://www.erepo.iihr.ernet.in/handle/123456789/395

Title: Genetics of yield and yield components in cauliflower
Authors: Devaraju
Guide/Chairperson: B, Varalakshmi
Keywords: Genetics
yield
components
cauliflower
Issue Date: 2003
Year of Submission: 2003
Abstract: An investigation on generation mean analysis in cauliflower was carried out at Indian Institute of Horticultural Research, Hessaraghatta, Bangalore, during 2002-2003. The objective was to estimate heterosis, heritability and genetic advance and gene action for various quantitative characters. The parents, hybrids and segregating generations were evaluated in RCBD with 3 replications. The salient features of the present investigation are summarized here under. All the crosses exhibited earliness for curd initiation and curd maturity over the parental population mean except IIHR Sel-5 x First Early. Significant heterosis observed for days taken for curd initiation, curd maturity, total plant weight stalk length and yield per plant in the cross IIHR 223 x IIHR 302, either in positive or negative direction. In cross IIHR 223 x IIHR 217-1-4-6-12, significant heterosis was observed for days taken for curd initiation, curd maturity, total plant weight, stalk weight and curd yield per plant, whereas in IIHR 217-1-4-6-12 x IIHR 73-24 for the character days taken for curd initiation, leaf number and leaf weight. The heterosis was significant for all the characters except for stalk length in the cross IIHR Sel-5 x First Early. In the F1 hybrid of IIHR 217-1-4-6-12 x IIHR 73-24 desirable negative heterosis for days taken for curd initiation was noticed. Highest heritability and genetic advance was observed for the characters curd yield per plant, stalk weight, leaf weight and total plant weight in cross IIHR 223 x IIHR 30. The cross IIHR Sel-5 x First Early recorded the highest heritability and genetic advance for the characters like curd yield per plant, stalk weight and total plant weight. Majority of yield contributing characters in IIHR 223 x IIHR 302 and IIHR 223 x IIHR 217-1-4-6-12 controlled by non-additive gene action where the hybrid vigour was exhibited. Hence it is beneficial to emphasize on heterosis breeding on these crosses. In IIHR 217-1-4-6-12 x IIHR 73-24 most of the characters were under the operation of additive gene action. It could be fixed by simple selection in segregating generations. Most of the characters of the cross IIHR Sel-5 x First Early were under the influence non-additive gene action, so it is wise to go for heterosis breeding to exploit the hybrid vigor
URI: http://www.erepo.iihr.ernet.in/handle/123456789/395
University in which they received their degree: University of Agricultural Sciences, Bangalore
Degree Level: M.Sc
Appears in Collections:DIVISION OF VEGETABLE CROPS

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