Correlations and path coefficient analysis in rice recombinant inbred lines

Akanksha Singh¹, DK Dwivedi¹, Archana Devi², Preeti Kumari², OP Verma², KN Singh¹

¹Department of Plant Molecular Biology and Genetic Engineering, N.D. University of Agriculture & Technology, Kumarganj, Faizabad

²Department of Genetics and Plant Breeding, N.D. University of Agriculture & Technology, Kumarganj, Faizabad

Received: 17 March 2016                                Revised Accepted: 19 May 2016

ABSTRACT

In this study 25 introgression lines developed by involving CSR-27 and MI-48 rice varieties were evaluated under normal and salinity stress conditions. Observations were recorded for yield and yield contributing traits. The genotypic correlations were generally similar in nature and higher in magnitude with the corresponding phenotypic correlation coefficients. Data in salinity condition revealed that grain yield having positive and significant correlation with panicle bearing tillers per plant and biological yield per plant while in normal condition with biological yield and harvest index. The path coefficient analysis indicated that biological yield and harvest index had maximum positive direct effect on grain yield at phenotypic level under salt condition. Biological yield, harvest index, plant height and spikelets per panicle have positive direct effect on grain yield per plant under controlled condition.

Key Words: Correlation coefficient, Path coefficient, Rice