Genetic studies in F2 for biometrical traits in Rice (Oryza sativa. L)
The present investigation was carried out with F2 plants of three different crosses of rice viz., BPT 2270 x AD09493, AD 08142 x Co (R) 50 and AD09493 x AD 11168. In this experiment, genetic variability, heritability, genetic advance, correlation and path analysis on seven quantitative traits viz., days to fifty per cent flowering, plant height, number of productive tillers, panicle length, thousand grain weight, spikelet fertility per cent and single plant yield were estimated. In all the three crosses, for the traits, days to fifty per cent flowering, plant height, number of productive tillers and thousand grain weight, minimum difference between PCV and GCV was obtained, indicating lesser influence of environment and more genetic control on the expression of these traits. The results of correlation analysis indicated that number of productive tillers had highest significant correlation with single plant yield and hence simultaneous selection for number of productive tillers, along with high spikelet fertility percentage can significantly improve the single plant yield in rice.
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