ISSN : 0975-3710
EISSN : 0975-9107
K.N. PRAJAPATI1*, K.B. KATHIRIA2
1Polytechnic in Agriculture, Khedbrahma, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, 385506, Dantiwada, Gujarat
2Director of Research and Dean P.G. Studies, Anand Agricultural University, Anand, 388110, Gujarat
* Corresponding Author : ketan.agrian@gmail.com
Received : 24-03-2018 Accepted : 28-03-2018 Published : 30-03-2018
Volume : 10 Issue : 6 Pages : 5630 - 5634
Int J Agr Sci 10.6 (2018):5630-5634
Keywords : Line x Tester, Combining ability, Gene action and Rice
Conflict of Interest : None declared
Acknowledgements/Funding : Author thankful to Anand Agricultural University, Anand, 388110, Gujarat
Author Contribution : All author equally contributed
The experiment was conducted with three CMS lines i.e., IR 68887 A, IR 79159 A and APMS 6 A which were crossed with eleven diverse male parents in line x tester fashion in order to estimate combining ability and gene action for grain yield and yield attributing traits in rice. The analysis of variances for combining ability revealed that significant mean sum of square for hybrids, females, female x male interaction for all the traits except effective tillers per plant. The results in respect to estimates of genetic variance revealed importance of additive genetic variance for panicle length. For other yield contributing characters like days to fifty percent flowering, plant height, grains per panicle, test weight, grain yield per plant, grain length, hulling%, milling% and head rice recovery % indicated importance of both additive and non-additive genetic variances with predominant role of non-additive gene effect was observed. Estimates of general combining ability effects among female parents, CMS line APMS 6 and among male parents, MILYANG 63, IR 09A 104, IR 77186-148-3-4-3, IR 04N 106, IR 07N 166 and IR 09N 534 were found to be good general combiners for grain yield per plant and at least for two to three important yield contributing characters. The estimates of specific combining ability revealed that among the crosses, cross combination namely IR 79159 A x IR 09A 104, IR-8887 A x IR 77186-148-3-4-3, IR 68887 A x POKKALI, APMS 6 A x IR 05N 412 and IR 68887 A x MILYANG 63 depicted significant and positive sca effect for seed yield and yield contributing traits. In general, the crosses depicted high sca effects for grain yield per plant and different component characters did not always involve parents possessing high gca effects, there by suggesting importance of both intra and inter-allelic interactions. Thus, these cross combinations could be utilized for further use in breeding programme for amelioration of grain yield and other desirable characters in rice.
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