Author(s):

B Manjunatha and M Krishnappa

Abstract: The present study was conducted at Agricultural and Horticultural Research station, Ponnampet, Karnataka. Experiment was composed of seventy two rice genotypes those were evaluated to study the genetic variability, heritability and genetic advance for grain yield with four yield associated traits. The experiment was conducted by using simple lattice design with two replications with local checks during the 2016 kharif main cropping season. The analysis of variance revealed statistically significant differences (p <0.05) indicating the existence of genetic variability among the seventy two genotypes for all the traits studied. Significant differences were observed for grain yield that ranged from 9100.00 to 7496.00 kg/ ha with overall mean value of 4455.00 kg/ha Higher PCV and GCV values were exhibited by yield kg/ha which suggests the possibility of improving this trait through selection. The highest heritability was recorded for plant height and yield kg/ha followed by days to fifty per cent flowering and panicles per meter square. High to medium heritability coupled with high GCV and high genetic advance as per cent of means were exhibited for plant height, grain yield kg/ha. High genetic advances as per cent of means were recorded by yield kg per hectare, panicles per square metre, Plant height (cm) and days to fifty per cent flowering. Conducted a large-scale screening for rice blast resistance genotypes in seventy two diverse rice accessions originating from major rice-growing regions of Karnataka and the few genotypes among them were shown tolerant.

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