Genetic variability, correlation and path coefficient for grain yield and quantitative traits of elite rice (Oryza sativa L.) genotypes at Uttar Pradesh
Studies on genetic variability, correlation and path coefficient analysis were conducted on 30 elite rice (Oryza sativa L.) genotypes. Analysis of variance among 30 genotypes showed significant difference for all characters studied. Highest genotypic coefficient of variance (GCV) phenotypic coefficient variance (PCV) was observed for grain yield per hill followed by harvest index indicating that these characters could be used as selection for crop improvement. High estimates of heritability coupled with high genetic advance were observed for plant height and spikelets per panicle. Correlation studies revealed that grain yield per hill was positively significant correlated with harvest index, biological yield per hill, test weight and plant height at both genotypic and phenotypic level. Path coefficients revealed the harvest index, biological yield per hill, number of spikelets per panicle, number of tillers per hill and plant height had high positive direct effect on grain yield at both genotypic and phenotypic level.
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