Research article | Open Access
HELIA 2026, Vol. 49(84) 11-24
Evaluation of Combining Ability and Heterosis for Yield and Oil content in Sunflower Hybrids: Line × Tester Approach
pp. 11 - 24 | DOI: https://doi.org/10.29329/helia.2026.1446.2
Publish Date: June 12, 2026 | Single/Total View: 0/0 | Single/Total Download: 0/0
Abstract
Sunflower is a vital oilseed crop, and enhancing its yield and oil content through heterosis breeding is crucial for food security and agricultural sustainability. The present study entitled, “Evaluation of Combining Ability and Heterosis for Yield and Oil content in Sunflower hybrids: Line x Tester Approach was aimed to study combining ability and heterosis.The experiment was conducted in a Randomized Block Design (RBD) with two replications. Using a Line × Tester mating design, four female lines were crossed with five male lines, resulting in 20 hybrids. The combining ability analysis indicated that CMS 10 A and CMS 112 A were good general combiners for seed yield per plant (g). CMS 234 A and PET 2-7-1-A showed good general combining ability for oil content (%). Among the restorer lines, EC 601924 exhibited good general combining ability for all traits except seed yield per plant (g) and volume weight (g/100ml). Out of the 20 hybrids, three hybrids CMS 234 A x EC 279309-1, CMS 112 A x RHA 138-2 and PET 2-7-1 A x EC 601924 were identified as particularly significant in terms of seed yield/plant(g), as well as other yield- related traits, recorded in a desirable direction, indicating that the crosses had high performance. The hybrids CMS 10 A x RHA 138-2, CMS 10 A x EC 399600, CMS 112 A x EC 75717, and CMS 112 A x RHA 138-2 exhibited significant heterosis for all measured traits, excluding plant height, in comparison to both checks LSFH 171 and KBSH 44. It was concluded that CMS 10 A, CMS 112 A, and their tester line RHA 138-2 were regarded as effective combiners in terms of seed yield and associated yield-contributing traits.
Keywords: Combining Ability, GCA, Heterosis, SCA, Yield
APA 7th edition
Sri, B.K., Suresh, G., Toprope, V., M, A., & Pole, S. (2026). Evaluation of Combining Ability and Heterosis for Yield and Oil content in Sunflower Hybrids: Line × Tester Approach. HELIA, 49(84), 11-24. https://doi.org/10.29329/helia.2026.1446.2
Harvard
Sri, B., Suresh, G., Toprope, V., M, A. and Pole, S. (2026). Evaluation of Combining Ability and Heterosis for Yield and Oil content in Sunflower Hybrids: Line × Tester Approach. HELIA, 49(84), pp. 11-24.
Chicago 16th edition
Sri, Burri Krishna, Guglothu Suresh, V.N. Toprope, Aishwarya M and S.P. Pole (2026). "Evaluation of Combining Ability and Heterosis for Yield and Oil content in Sunflower Hybrids: Line × Tester Approach". HELIA 49 (84):11-24. https://doi.org/10.29329/helia.2026.1446.2
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