The Studies on Trait Association and Path Analysis for Protein and Yield Related Traits in F2 Population of Rice (Oryza sativa L.)

Abstract

The present experiment was carried out in rice using F2 segregating populations of two cross combinations viz., RNR 15048 x JAK 686 and RNR 15048 x JAK 685. Correlation analysis revealed negative and significant correlation of protein content with number of filled grains per panicle, test weight, single plant yield and kernel length and positive non-significant association with panicle length, number of productive tillers per plant and L/B ratio in cross I and positive non-significant association with days to 50% flowering, plant height, number of productive tillers per plant, number of filled grains per panicle, kernel breadth and amylose content and negative association with panicle length, test weight, single plant yield, kernel length and L/B ratio in cross II. Path analysis revealed that L/B ratio exerted highest positive direct effect on the protein content followed by kernel breadth, number of productive tillers per plant and panicle length in cross-I and number of productive tillers per plant, plant height, amylose content, test weight and kernel length exerted highest positive direct effect on the protein content in cross –II.