Correlation and Path Analysis for Yield and its Component Traits in Rice (Oryza sativa L.)
Soharu Alka and Pandey DP*
Rice & Wheat Research Centre, CSK Himachal Pradesh Krishi Vishwavidyalaya (CSKHPKV), Malan (HP) Pin-176 047
*Corresponding author (email: email@example.com)
Received: 15th Nov. 2018, Accepted: 13th Dec. 2018
The materials used in this study consisted of 31 genotypes including two checks i.e. HPR 1156 and HPR 2656. The material was raised in a randomized block design with three replications. Data was recorded on days to 50% flowering, days to 75% maturity, plant height, panicle length, grains/panicle, spikelets/panicle, yield/plant, 1000-grain weight, grain length, grain breadth, L:B ratio, protein content, aroma, yield/plot, reaction to leaf and neck blast. The data were analyzed as per standard statistical procedures. Genotypic correlation was higher in magnitude than the phenotypic correlation coefficient, indicating more genetic association among the various traits. Grain yield/plant exhibited significantly positive association with days to 50% flowering, panicle length, grains/panicle, spikelets/ panicle and grain breadth at both genotypic level and phenotypic level. Thus the results indicate that improvement in grain yield/plant can be obtained by laying more emphasis on above characters. Path analysis revealed the highest positive direct effect of grains/panicle on the grain yield followed by L/B ratio, 1000-grain weight, and yield/plant and emphasis may be laid on these characters in future rice breeding programmes.