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Yudhvir Singh ¹, Rishu ¹, Arti Verma ¹, Sanjay Chadha ¹

Affiliations
1 Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-1760 62, IN

Abstract

The present investigation was carried out at Palampur during rabi 2012 and 2013 to gather information on the nature of gene action by following line × tester mating design involving five lines and three testers. The analysis of variance revealed significant differences among treatments for days to marketable curd maturity from date of transplanting, gross weight per plant, marketable yield per plant, curd size index, curd depth, curd diameter, per cent marketable curds, stalk length, number of leaves per plant, plant height, harvest index, ascorbic acid content and total soluble solids. The magnitude of dominance variance was higher than additive variance for all the traits except curd depth and total soluble solids which indicated the involvement of nonadditive gene action which could be utilized through the development of hybrids in cauliflower. A complete correspondence was noticed between per cent contribution of line × tester interaction (crosses) and non-additive gene action (σ²D), which reaffirm the importance of hybrids in cauliflower.

Keywords

Cauliflower, Gene Action, GCA Variance, SCA Variance and Line x Tester.

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Yudhvir Singh ¹, Girdhar Gopal Soni ¹, Akhilesh Sharma ¹, Viveka Katoch ¹, Arti Verma ¹

Affiliations
1 Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, IN

Abstract

Studies were carried out on six genotypes (PalamUphar, DPCa Y-2, DPCa Y-3, DPCa Y-4, DPCa Y-5 and DPCa Y-6) of mid-late group of cauliflower at Experimental Farm of the Department of Vegetable Science and Floriculture, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur during the period from September 2010 to June 2011 to find out the levels of compatibility. The pollination treatments included self-pollination in open flowers at 25% flowering (OP-I), self-pollination in open flowers at 50- 75% flowering (OP-II) and self-pollination in open flowers at more than 75% flowering (OP-III). Majority of the plants in all the genotypes studied were in the compatibility grade 0-10 per cent, whereas, there was little change in the genotypes DPCa Y-2, DPCa Y-3, DPCa Y-4, DPCa Y-5 and DPCa Y-6 for the number of plants in the compatibility grade 0-10 except PalamUphar (OP-III). Hence, those plants falling in 0-10 compatibility grade can be used for the isolation of S-allele homozygotes for the development of selfincompatible lines for hybrid development.

Keywords

Compatibility Levels, Cauliflower, Pollination, S-Allele.

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