Z. A. HaiderChandra Kishor2024-07-092024-07-091999https://krishikosh.egranth.ac.in/handle/1/5810211671Forty genotypes of upland rice ( oryza stavia L.) of diverse origin formed the material for the present study. These genotypes were directly sown in a Randomised Block Design with three replications under upland situation during kharif season of 1997.Observation were recorded on five randomly selected plants from each entry of every replication. Analysis of variance revealed significant difference among the genotypes for all the characters, except, number of tillers per plant, effective tillers per plant effective tillers per plant and grain per panicle. A wide range of variability was observed in grain yield per plant, flag leaf area, grain yield per panicle, 1000 – grain weight, plant height and effective tillers per plant. Phenotypic as well as genotypic coefficient of variation was high to moderate in grain yield per panicle, plant height, 1000grain weight and number of grains per panicle. Heritability and genetic advance as percent of mean was also high for grain yield per plant, flag leaf area, grain yield per panicle, plant height, 1000- grain weight and number of grain per panicle. Grain yield per plant had a significant and positive association with number of tillers per plant , effective tillers per plant height, panicle length, number of grains per panicle, grain yield per panicle, flag leaf area and 1000- grain weight both at genotypic and phenotypic level. Path analysis revealed that all the characters had positive direct effect on grain yield per plant, except 1000- grain weight. GFrain yield per panicle had highest direct positive effect but its indirect effect via numbers of grain per panicle, 1000- grain weight, flag leaf area and effective tillers per plant was weak negative. Rest of the characters had appreciable positive direct effect. Over all estimation is that grain yield per panicle number of grains per panicle, flag leaf area and plant height may be used in section for increasing grain yield in upland rice.EnglishThesis