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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2019, Volume : 7, Issue : 1
First page : (267) Last page : (273)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7308

Variability, Correlation and Path Analysis Studies of Yield and Yield Attributing Traits in Advanced breeding lines of rice (Oryza sativa L.)

Mutturaj Dhavaleshvar*, C. Malleshappa and B. M. Dushyanth Kumar

Department of Genetics and Plant Breeding, COA Shivamogga, UAHS, Shivamogga
*Corresponding Author E-mail: mutturaj6163@gmail.com
Received: 24.12.2018  |  Revised: 30.01.2019   |  Accepted: 8.02.2019  

 ABSTRACT

The present investigation was carried out to determine the nature and magnitude of genetic variability, the degree of association between grain yield and yield attributing characters and their direct, indirect effects on grain yield in twenty-seven advanced breeding lines of rice with four checks. The experiment was carried out in Randomised Complete Block Design (RCBD) with three replications at three locations viz., ZAHRS, Shivamogga, AHRS, Kathalagere and AHRS, Ponnampet during Kharif 2017. The result from the study revealed that all the thirteen traits under study showed a wide range of variation. Moderate to high PCV and GCV values were observed for plant height, number of filled grains per panicle, number of spikelets per panicle, test weight, straw yield and grain yield. High heritability coupled with high GAM for plant height, test weight and straw yield. Straw yield and harvest index showed significant positive correlation with grain yield per hectare. Therefore, the improvement of these traits through selection will automatically result in increased grain yield. Straw yield, days to maturity, harvest index, panicle length, days to fifty per cent flowering, number of productive tillers per plant, number of filled grains per panicle and test weight exhibited a positive direct effect on grain yield indicating that the selection for these characters was likely to bring about an overall improvement in grain yield directly. 

Key words: Correlation, Path coefficient, Rice, Variability.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Dhavaleshvar, M., Malleshappa, C. and  Dushyanth Kumar, B.M., Variability, Correlation and Path Analysis Studies of Yield and Yield Attributing Traits in Advanced breeding lines of rice (Oryza sativa L.), Int. J. Pure App. Biosci.7(1): 267-273 (2019). doi: http://dx.doi.org/10.18782/2320-7051.7308