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Title: Studies on heterosis in chillies (Capsicum annum L.) using genicytoplasmic male sterility
Authors: S, Thippeswamy
Guide/Chairperson: A A, Deshpande
Keywords: heterosis
male sterility
Issue Date: 1998
Year of Submission: 1998
Abstract: The studies on heterosis in chillies (Capsicum annum L.) using genicytoplasmic male sterility were carried out. Three male sterile lines and 10 male parents drawn from breeding lines resistant to different diseases and germplasm selections were crossed in Line x tester fashion to get 30 F1 hybrids. These hybrids were compared with 13 commercial F1 hybrids for 20 growth, yield and quality parameters. Mean performance of hybrids was superior than mean performance of parents for majority of characters viz., plant spread, number of tertiary branches, number of laterals, days taken from flowering to fruit ripening, first and second harvest, fruit length, percent pedicle, percent seed content, first harvest and total number of fruits, first harvest and total dry fruit yield per plant and capsaicin content (%). For total dry fruit yield per plant maximum of 54.85% heterosis over better parent and 20.21% over best commercial F1 hybrid was recorded. Combining ability studies have shown the predominance of additive gene action over non-additive effects for majority of characters except plant spread, days from flowering to fruit ripening, fruit length (I harvest), percent pedicel capsaicin and capsanthin content. However, involving of both additive and non-additive gene effects were noticed for number of laterals first harvest fruit length and width, first harvest fruit number and first fruit yield per plant. Cytoplasmic effects on expression of characters revealed no cytoplasmic differences for majority of characters. However, these differences indicted that the differences is not only due cytoplasmic alone but to genome x cytoplasmic interactions. In the present study, when comparison was made between the male sterile lines and their respective maintained lines, the maintainer lines had higher number of seed per fruit under open set.
URI: http://www.erepo.iihr.ernet.in/handle/123456789/380
University in which they received their degree: University of Agricultural Sciences, Bangalore
Degree Level: M.Sc

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