Studies on correlation and path analysis in rice (Oryza sativa L.) genotypes
Abstract
The experiment was carried out to study the correlation and path analysis in twenty five rice (Oryza sativa L.) genotypes and the observations were recorded for eight root, six physiological and nine yield related traits. Correlation studies revealed that among the traits studied, six root traits, four physiological traits and six yield related traits observed significant positive genotypic correlations with grain yield. The highest positive correlation with grain yield was recorded by root number at 15 cm. Path analysis revealed that very high magnitude of positive direct effect with grain yield was registered by root length. Very high to high magnitudes of negative direct effects were exhibited by root volume. Thus, from earlier as well as present findings of correlation and path analysis, it could be concluded that the characters viz., root length, root number at 15 cm, leaf area index, panicle number, panicle weight and grain weight would be the appropriate selection parameters for improvement of grain yield under aerobic rice system as these traits recorded strong positive correlation along with high magnitude of direct influence on grain yield.
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