Summary
One hundred and thirtysix hybrids were developed utilizing four cytoplasmic genetic male sterile lines (V 20A, Zhen Shan 97A, IR 46829A and IR 46830A) and 34 effective restorers. Heterosis, heterobeltiosis and standard heterosis were found to be significant for grain yield and other yield attributing characters in most of the hybrids. The heterosis for grain yield was mainly due to the significant heterosis for the number of spikelets per panicle, test weight and total dry matter accumulation. Interestingly, it was found that most of the higher yielding hybrids were accompanied by significant negative heterosis for harvest index. Hybrids shorter than the shortest parent and earlier than the earliest parent were not observed; hybrids with intermediate to tall plant height having nonlodging habit could be developed. Eighteen hybrids gave more than 20% grain yield than the standard checks. These were evaluated for their stable and consistent yield performance over four seasons. The results on analysis for stability parameters indicated that the hybrids V 20A × Himdhan and Zhen Shan 97A × Mahsuri were stable over environments.
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References
Eberhart S.A. & W.A. Russell, 1966. Stability parameters for comparing varieties. Crop Sci. 6: 34–40.
Fonseca S. & F.L. Patterson, 1968. Hybrid vigour in a seven parent diallel cross in common winter wheat (Triticum aestivum L.). Crop. Sci. 8: 85–88.
Jones J.W. 1926. Hybrid vigour in rice. J. Am. Soc. Agron. 18: 423–428.
Lin S.C. & L.P. Yuan, 1980. Hybrid rice breeding in China. In: Innovative approach to rice breeding. Int. Rice Res. Inst., Los Baños, Philippines, p. 35–51.
Matzinger D.F., T.J. Mann & C.C. Cockerham, 1962. Diallel cross in Nicotiana tabacum. Crop Sci. 2: 383–386.
Nijaguna G. & M. Mahadevappa, 1983. Heterosis in intervarietal hybrid of rice. Oryza 20: 159–161.
Swaminathan M.S., E.A. Siddiq & S.D. Sharma, 1972. Outlook for hybrid rice in India. In: Rice breeding, pp. 609–613. Laguna, Philippines. Int. Rice Res. Inst. (Los Baños). Annu. Rep.
Virmani S.S., R.C. Choudhury & G.S. Khush, 1981. Current outlook on hybrid rice. Oryza 18: 67–84.
Virmani S.S., R.C. Aquino & G.S. Khush, 1982. Heterosis breeding in rice (Oryza sativa L.). Theor. Appl. Genet. 62: 373–380.
Virmani S.S. & I.B. Edwards, 1983. Current status and future prospects for breeding hybrid rice and wheat. Adv. Agron. 36: 145–214.
Yoshida H. & H. Fujimaki, 1984. Development of male sterile restoration system for hybrid rice production. I. Combining ability of half sib F1 hybrids with a common parent ‘Akihikari’. Japan J. Breed. 34 (Suppl.): 194–195.
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Patnaik, R.N., Pande, K., Ratho, S.N. et al. Heterosis in rice hybrids. Euphytica 49, 243–247 (1990). https://doi.org/10.1007/BF00036295
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DOI: https://doi.org/10.1007/BF00036295