Character association and path coefficient analysis for yield and its component traits in slender grain rice (Oryza sativa L.)
Abstract
An investigation was carried out at Rice Research Station, O.U.A.T., Bhubaneswar evaluating thirty-two genotypes with an objective to determine the degree of association between yield and it`s component characters and their direct, indirect effects on grain yield in slender grain rice. The results from the correlation studies showed that grain yield had the highest estimates of positive correlation both at genotypic and phenotypic level with the number of effective tillers/plant (rp=0.853, rg=0.997) followed by the number of filled grains/panicle (rp =0.816, rg =0.835). Path analysis studies reported that high direct contribution to yield was manifested by the number of filled grains per panicle (0.538) followed by the number of effective tillers/plant (0.513). The number of effective tillers/plant also exhibited the highest indirect effect on grain yield via the number of filled grains per panicle (0.275). This indicated that the simultaneous selection of these characters would be fruitful for yield improvement in slender grain rice.
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