Vegetos
(An International Journal of Plant Research & Biotechnology)
Deployment of combining ability analysis to study gene action under different environments in okra [Abelmoschus esculentus (L.) Moench]
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Patel Arpita A., Vekariya Rajesh D., Patel Akshay I., Modha K. G.
Research Articles | Published: 05 August, 2025
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Keywords: Okra, Combining ability, Gene action, Environment effect, GGE biplot
Abstract
Development of hybrid breeding technique requires an understanding of gene action and its interaction with the environment. Ten parents and 24 hybrids generated from 6 × 4 line tester mating design were assessed to estimate combining ability effects and mode of gene action influencing thirteen traits in okra under summer and monsoon conditions. The data will help to identify high performing parents with superior general combining ability effects and outstanding hybrids with good specific combining ability effects. Data analysis was done using both traditional line × tester analysis and the GGE biplot technique. Among the hybrids, H12 was consistent with respect to higher heterotic effect across the environments. According to the studys findings, five traits were regulated by non-additive, six by additive and one by both additive and non-additive gene action. Lines L3, L6 and tester T1 exhibited the highest GCA effects for fruit yield/plant. Among the crosses, H21, H12 and H19 were good specific combiners for fruit yield/plant. The outcomes of GGE biplot graphical analysis closely matched those of conventional analysis in identifying suitable lines and hybrids. The present study emphasizes the importance of heterosis and combining ability and the scope of okra hybrids for their commercial exploitation in future breeding programs.
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Author Information
Department of Genetics and Plant Breeding, Navsari Agricultural University, Navsari, India