Author(s):

S Muthuramu and T Ragavan

Abstract: Genotypic correlation and path coefficient analysis was carried out at Agricultural Research Station, Tamil Nadu Agricultural University, Paramakudi to study the association between nine yield related traits during Rabi 2018-19 in 38 rice genotypes under rainfed rice ecosystem. Number of productive tillers per plant, number of panicles per square metre, straw yield per plot and harvest index expressed positive and significant correlation with grain yield. The trait, number of productive tillers per plant had positive and significant association with number of panicles per square metre, spikelet fertility and harvest index suggesting that selection based on number of productive tillers per plant is highly fruitful in developing high yielding genotypes in rainfed situation, as it will bring simultaneous improvement of these traits. The traits straw yield and harvest index expressed high direct effect on grain yield. The traits number of productive tillers per plant, number of panicles per square metre, straw yield per plot and harvest index should be given more importance for enhancing grain yield under rainfed rice ecosystem.

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