Studies on Gene Action for Yield and its Components Traits in Rice (Oryza sativa L.) for Sodicity Tolerance

Author: Raushan Lal, P. K. Singh and Priyanka Rajput

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Abstract

The present investigation was based on evaluation of a line × tester set of 60 hybrids (F1s) and their 20 parents along with two checks (Narendra Usar 2009 and IR 28) for thirteen characters. In general, PCV were higher than the GCV for all characters under sodic soil. Nine traits emerged as most important associates of grain yield per plant under sodic soil. The mean square due to lines representing additive effects and G.C.A. are significant for all characters. For grain yield per plant, lines NDRK 50057, Narendra Usar 2009, CSR 36, NDRK 50037, IRRI 123, NDRK 50036, NDRK 50045, NDRK 50055 and NDRK 50063 and testers, Jaya and Sarjoo 52 were identified as good general combiners in sodic soil for Grainyield per plant and several other important traits to emerge as valuable parents for hybridization programme for obtaining High yielding pure line/hybrid varieties. The most desirable crosses show showing high mean performance and high and significant heterosis of positive Nature one

Keywords

Heritability, path analysis, line × tester, sodic soil

Conclusion

60crosses generated by crossing 20 lines with three testers during kharif 2014 and the hybrid along with parental lines and check varieties were evaluated during kharif 2015 and the Research Farm of department of genetics and plant breeding of N.D. University of Agricultural and Technology Narendra Nagar Kumarganj, Faizabad. Path analysis identified biological yield (Kumar & Verma 2015) as per plant harvest index and grains per panicle as most important and contributing traits are components and speculate fertility in general PCV where higher than GCV for all characters and sodic soil. SCA variances may higher than GCA variances (Dharwal et al., 2017) for all the characters in sodic soil indicating predominance of non additive gene action. There is variability (Basavaraja et al., 2013) in the estimate of heterobeltiosis and standard heterosis. In the positive and negative direction observed for grain yield per plant. In case of disease and insect 9 parents and 4 crosses where found

References

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How to cite this article

Lal, R., Singh, P.K. and Rajput, P. (2021). Studies on Gene Action for Yield and its Components Traits in Rice (Oryza sativa L.) for Sodicity Tolerance. Biological Forum – An International Journal, 13(1): 728-731.