Himachal Journal of Agricultural Research

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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Shweta Sharma ¹, Viveka Katoch ¹, Sanjay Chadha ¹, Vedna Kumari ²

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

Abstract

Bacterial wilt is the most destructive disease in the tropical, subtropical, and temperate regions of the world, causing a heavy economic loss in eggplant. The chemical control of the disease is not effective and the cultivation of bacterial wilt resistant varieties is the only solution to overcome the disease, but cultivated resistant varieties are gradually becoming susceptible to the disease. Thus, an experiment was conducted to screen out twenty F s developed through diallel mating design along with parents viz., Res-1, Res-2, H-8, Arka 1 Nidhi, and Arka Keshav for bacterial wilt resistance under mid-hill conditions of Himachal Pradesh over the seasons. These were categorized according to the Sitaramiah scale (1981) as the observation was recorded on plant survival. The cross combinations were found immune, highly resistant, and moderately resistant to bacterial wilt and can be utilized to develop resistant cultivar(s) through crop improvement.

Keywords

Eggplant, Diallel, Bacterial Wilt, Categorization.

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