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ABSTRACT: Abiotic stresses adversely affect plant growth and productivity leading to series yield losses. Submergence stress is one the major abiotic stresses that affects crop growth and yield. This study was conducted in the experimental field of Bangladesh Rice Reserch Institute, Gazipur during 2014-2015 to evaluate 46 submergence tolerant rice genotypes through agronomic traits. The experiment was laid out with a randomized complete block designwith three replications. Ten agronomic traits Viz. Plant height (cm), effective tillers per plant, Days to 50% flowering (days), flag leaf length (cm), panicle length (cm), panicle weight (g), spikelet fertility (%), days to maturity (days), thousand grain weight (g), and yield/plant (g) were studied to measure nature of association between these traits and yield. Results showed that ample variability existed in all the traits under studied. Grain yield was significantly and positively correlated with panicle weight, spikelet fertility percentage and thousand grain weight of rice. Days to 50% flowering had strong positive association with days to maturity. From this study panicle weight, spikelet fertility percentage, days to maturity and thousand grain weight may serve selection criteria for improving genetic potential of rice.
Keywords: Abiotic stress, submergence tolerance, rice direct effect, yield
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