Association Analysis and Correlation Studies in Upland Rice (Oryza sativa)

Abstract

A total of 53 advanced breeding lines derived from 12 distinct crosses of upland rice germplasm were evaluated during Kharif 2018 at Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, Uttar Pradesh. Grain yield showed significant positive correlation with no. of tillers per plant, no. of panicles per tiller, spikelets per panicle, biological yield, harvest index and test weight. Harvest index showed highly significant positive correlation with grain yield at both phenotypic and genotypic level. Moderate PCV and GCV was observed for number of tillers per plant followed by flag leaf length, seed yield per plant, harvest index, number of panicles per plant, test weight and panicle length. Genetic advance as per cent of mean was highest for number of tillers per plant, followed by flag leaf length, seed yield per plant, no. of panicles per plant, harvest index and test weight. Moderate genetic advance as per cent of mean was recorded for biological yield per plant, number of spikelets per plant, flag leaf width and plant height. High heritability coupled with high genetic advance as percent of mean in the present set of rice genotypes was recorded for plant height and harvest index. So, selection for these traits could lead to improvements in rice yield and productivity.