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Analysis of Correlation and Path Coefficients among Yield and Biochemical Traits under Irrigated and Reproductive Stage Drought Stress in Oryza sativa L



Analysis of Correlation and Path Coefficients among Yield and Biochemical Traits under Irrigated and Reproductive Stage Drought Stress in Oryza sativa L







Inter-relationships among yield and fourteen biochemical traits were studied under NS and RSS in eighteen genotypes of upland rice. None of the biochemical traits showed significant phenotypic correlation with grain yield plant 1 under irrigated (NS), while grain yield plant 1 had highly significant and positive correlation with chlorophyll a, chlorophyll b, nitrate reductase, soluble sugar at flowering starch at re-watering and soluble sugar in leaf under reproductive stage drought stress (RSS). This indicated that these biochemical traits were important associates of grain yield under RSS. Out of 124 character pairs, the significant estimates of phenotypic correlations in either direction were shown by nine character pairs in NS and 21 character pairs under RSS. In path analysis, high order positive direct effects was exerted by soluble sugar upper root and starch at re-watering under NS and starch at maturity, followed by leaf starch and chlorophyll a under RSS. Nitrate reductase, s.

Accession: 036971846

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