International Journal of Plant Sciences

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Genetic Studies in Upland Rice (Oryza sativa L.)


Affiliations
1 Department of Agricultural Botany, College of Agriculture, Kolhapur (M.S.), India
2 Division of Agricultural Botany, College of Agriculture, Kolhapur (M.S.), India
3 Department of Agricultural Botany, College of Agriculture, Bharati Vidyapeeth's Loknete Mohanrao Kadam, Kadegaon, Sangli (M.S.), India
     

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Studies on genetic variability, character association and path co-efficient analysis were conducted on 40 rice genotypes. Analysis of variance revealed considerable variability among the genotypes for all the characters. A high genotypic and phenotypic co-efficient of variation was observed for grain yield per plant, straw yield per plant, productive tillers per plant, spikelets per panicle, harvest index, 1000 grain weight, number of panicles per running meter, spikelet fertility, plant height, days to 50 per cent flowering and panicle length. Spikelets per panicle showed the highest broad sense heritability (95.81%). Grain yield per plant showed high value of heritability coupled with low genetic advance. The genotypic correlations among the yield traits and their path co-efficient were estimated. The grain yield per plant showed significant positive correlation with harvest index, 1000 grain weight, straw yield per plant, plant height and productive tillers per plant. The traits days to maturity, plant height, straw yield per plant and harvest index had moderate to high positive direct effect on grain yield per plant. The study revealed that genetic improvement of grain yield in rice is admissible by selecting characters having high positive correlation and positive direct effect.

Keywords

Oryza sativa, Heritability, Genetic Advance, Correlation, Path Co-Efficient.
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  • Genetic Studies in Upland Rice (Oryza sativa L.)

Abstract Views: 487  |  PDF Views: 2

Authors

S. R. Shinde
Department of Agricultural Botany, College of Agriculture, Kolhapur (M.S.), India
Kamlesh Kumar
Division of Agricultural Botany, College of Agriculture, Kolhapur (M.S.), India
R. M. Pawar
Department of Agricultural Botany, College of Agriculture, Bharati Vidyapeeth's Loknete Mohanrao Kadam, Kadegaon, Sangli (M.S.), India

Abstract


Studies on genetic variability, character association and path co-efficient analysis were conducted on 40 rice genotypes. Analysis of variance revealed considerable variability among the genotypes for all the characters. A high genotypic and phenotypic co-efficient of variation was observed for grain yield per plant, straw yield per plant, productive tillers per plant, spikelets per panicle, harvest index, 1000 grain weight, number of panicles per running meter, spikelet fertility, plant height, days to 50 per cent flowering and panicle length. Spikelets per panicle showed the highest broad sense heritability (95.81%). Grain yield per plant showed high value of heritability coupled with low genetic advance. The genotypic correlations among the yield traits and their path co-efficient were estimated. The grain yield per plant showed significant positive correlation with harvest index, 1000 grain weight, straw yield per plant, plant height and productive tillers per plant. The traits days to maturity, plant height, straw yield per plant and harvest index had moderate to high positive direct effect on grain yield per plant. The study revealed that genetic improvement of grain yield in rice is admissible by selecting characters having high positive correlation and positive direct effect.

Keywords


Oryza sativa, Heritability, Genetic Advance, Correlation, Path Co-Efficient.

References