Asian Journal of Bio Science

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Studies on Heterosis in Cotton (Gossypium hirsutum L.) for Seed Cotton Yield and its Components


Affiliations
1 Department of Genetics and Plant Breeding, Agricultural College, University of Agricultural Sciences, Dharwad, Karnataka, India
2 Agricultural Research Station (u.a.s-d), Hebballi, Karnataka, India
     

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Present study was undertaken to assess the extent of heterosis for seed cotton yield and its attributing traits in 54 inter plant type hybrids of cotton developed by crossing 9 lines with 6 testers in line tester mating design during Kharif 2009 at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad. The mean sum of squares of parent's vs hybrids was significant for all the characters except reproductive points and boll harvest index, indicating presence of heterosis for these traits. None of the crosses were superior for all the traits studied. However, the cross L5 x T5 was the best as it had highest mean performance for economically important characters. Majority of the crosses exhibited positive significant mid parent, better parent heterosis for all important yield contributing characters except for inter boll distance and inter branch distance where they showed significant negative heterosis, indicating predominance of non-additive gene action in the genetic control of these traits. Most of the hybrids expressed significant standard heterosis for all the characters over the checks.

Keywords

Cotton, Heterosis, Seed Cotton Yield
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  • Studies on Heterosis in Cotton (Gossypium hirsutum L.) for Seed Cotton Yield and its Components

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Authors

H. M. Ranganatha
Department of Genetics and Plant Breeding, Agricultural College, University of Agricultural Sciences, Dharwad, Karnataka, India
Shreekanth S. Patil
Agricultural Research Station (u.a.s-d), Hebballi, Karnataka, India
S. M. Manjula
Agricultural Research Station (u.a.s-d), Hebballi, Karnataka, India
B. C. Patil
Agricultural Research Station (u.a.s-d), Hebballi, Karnataka, India

Abstract


Present study was undertaken to assess the extent of heterosis for seed cotton yield and its attributing traits in 54 inter plant type hybrids of cotton developed by crossing 9 lines with 6 testers in line tester mating design during Kharif 2009 at Main Agricultural Research Station, University of Agricultural Sciences, Dharwad. The mean sum of squares of parent's vs hybrids was significant for all the characters except reproductive points and boll harvest index, indicating presence of heterosis for these traits. None of the crosses were superior for all the traits studied. However, the cross L5 x T5 was the best as it had highest mean performance for economically important characters. Majority of the crosses exhibited positive significant mid parent, better parent heterosis for all important yield contributing characters except for inter boll distance and inter branch distance where they showed significant negative heterosis, indicating predominance of non-additive gene action in the genetic control of these traits. Most of the hybrids expressed significant standard heterosis for all the characters over the checks.

Keywords


Cotton, Heterosis, Seed Cotton Yield

References