Assessing genetic potential of direct seeded rice for yield and its component traits in upland conditions of Western Himalayas
Genetic assessment of DSR
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Authors
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Surbhi Patyal
Department of Genetics & Plant Breeding, College of Agriculture, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh-176062, India
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D.P. Pandey
Department of Genetics & Plant Breeding, College of Agriculture, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh-176062, India
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Kumar Sanu
Rajmata Vijayaraje Scindia Krishi Vishvavidyalaya, Gwalior, Madhya Pradesh-474002, India
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Arshia Prashar
Department of Vegetable Science & Floriculture, College of Agriculture, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh -176062, India
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Nijit Chauhan
Department of Genetics & Plant Breeding, College of Agriculture, Chaudhary Sarwan Kumar Himachal Pradesh Krishi Vishvavidyalaya, Palampur, Himachal Pradesh-176062, India
Keywords:
Direct seeded rice (DSR), upland, general combing ability (GCA), specific combining ability (SCA), heterosis, gene action.Abstract
Direct seeded rice (DSR) offers a sustainable alternative to conventional transplanted rice due to its potential to enhance environmental health, improve resource efficiency and suitability for climate resilience. Genetic improvement for direct seeded rice requires identification of genotypes with rapid early vigour, stress resilience and stable yield expression under rainfed conditions. This study focused on dissecting the combining ability and heterosis patterns under direct seeded rainfed conditions. Thirteen lines, three testers and thirty nine F1 hybrids were evaluated using line × tester mating design to identify promising parents and hybrid combinations performing well under DSR systems. Among the parents, lines HPR 2872, HPR 2877, HPR 2888 and tester, HPR 2656 were identified as good general combiners, underscoring their utility as elite donors for enhancing genetic architecture under direct seeded conditions. Among the F1 hybrids, HPR 2872 × HPR 1156, HPR 2873 × HPR 2656, HPR 2875 × HPR 2795, HPR 2902 × HPR 2656 demonstrated outstanding Specific Combining Ability (SCA) effects, heterobeltiosis and standard heterosis, indicating strong role of non-additive genetic control and suitability for heterosis exploitation. By using DSR-adapted genetic material, this study focuses on identifying elite parents and F1 crosses that can accelerate development of climate resilient, resource efficient rice cultivars.
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