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Combining Ability Analysis and Its Relationship with Gene Action and Heterosis in Early Maturity Cauliflower

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Proceedings of the National Academy of Sciences, India Section B: Biological Sciences Aims and scope Submit manuscript


Eighty crosses derived from line (10) × tester (8) mating design along with their parents were evaluated to study the combing ability and its relationship to gene action and heterosis for eight yield and related traits in early maturity cauliflower. Analysis of genetic component of variance and variance due to specific combining ability (σ2 sca) revealed preponderance of dominant variance and non-additive gene action for all of the traits except for days to 50 % curd maturity. In hybrids, contribution of lines was higher over the testers for all the traits. Among the lines cc-32E, 395aa and 14-4-17 and testers Sl-71, 23000 and Pusa Deepali were identified as promising general combiner for gross plant weight and marketable and net curd weight. However, hybrid cc-32E × Pusa Meghna was earliest (52 days) for curd maturity. For leaf area, plant height, curd compactness and gross plant weight the best combination was cc-32E × 23000. Among the hybrids, identified superior crosses with significantly highest level of heterosis over better parents were 395aa × Sel-7 (68.0 %), cc-32E × 23000 (48.19 %) and 395aa × Pusa Deepali (34.76 %) for economic trait marketable curd weight. Hence these hybrids can be further tested under different agro-climate for commercial production.

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The authors wish to acknowledge to the Director, Indian Agricultural Research Institute, New Delhi for providing fund for research.

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Correspondence to Veerendra Kumar Verma.

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Verma, V.K., Kalia, P. Combining Ability Analysis and Its Relationship with Gene Action and Heterosis in Early Maturity Cauliflower. Proc. Natl. Acad. Sci., India, Sect. B Biol. Sci. 87, 877–884 (2017).

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