Correlation Between Traits and Path Analysis Coefficient for Grain Yield and other Components in Rice (Oryza Sativa L.) Genotypes.

ABSTRACT

Current research was conducted out at the Wet land farm of S.V. Agricultural College, Tirupati during kharif, 2011 and rabi, 2011-12 crop seasons. The objective was to establish the nature of relation between grain yield and yield components by partitioning the correlation coefficients between grain yield and its components into direct and indirect effects by using simple correlation and path analysis. A correlation coefficient and path analysis study was conducted with six parents and their 15 F1 crosses for eleven component characters including grain yield. The obtained results indicated that number of grains per panicle, total number of productive tillers per plant, harvest index, kernel L/B ratio, milling percentage and panicle length showed highly significant positive association with grain yield per plant. In the path coefficient analysis, number of grains per panicle and total number of productive tillers per plant should be considered as the main yield components because these traits showed the highest positive direct effects towards increasing grain yield with the values of +0.773 and +0.572, respectively. Depending on the findings of present study, number of grains per panicle and total number of productive tillers per plant may be used an effective selection criterion to improve genetic yield potential of rice genotypes.