Green Global
Foundation   Journal
...an emerging window for scientific research and publication across the globe

GENETIC VARIABILITY, HERITABILITY, GENETIC ADVANCE AND PATH COEFFICIENT IN BC2F2 POPULATION OF RICE (Pages : 27 - 36)

A total of fifty-two BC2F2 rice genotypes derived from crossing between salt tolerant rice variety Binadhan-10 and bacterial leaf blight resistant rice line IRBB60 followed by backcrossing were studied in field condition for genetic variability, heritability, genetic advance, correlation and path coefficients of yield and yield contributing traits along with parents. The quantitative agronomic data of these traits were collected from three plants of each genotype. A wide range of significant variation was observed among the genotypes for yield contributing traits namely days to flowering, days to maturity, plant height, total tillers plant-1, effective tillers plant-1, panicle length, filled grains panicle-1, unfilled grains panicle-1, 1000 seeds weight as well as on grains yield plant-1. The phenotypic variability was higher than the genotypic variability for all traits, indicated these traits were influenced with environmental factors. The highest phenotypic and genotypic variances were observed in filled grains panicle-1, while the highest phenotypic and genotypic coefficients of variation were observed in unfilled grains panicle-1. These two traits also showed high heritability in conjunction with high percentage of genetic advance over mean indicated the significant role of additive gene actions on these traits and therefore an accountable scope of selection utilizing their phenotypic performance is pertinent. The correlation and path coefficient analysis also revealed that filled grains panicle-1 showed strong positive association with grains yield plant-1 along with their direct effect on grains yield plant-1 both at phenotypic and genotypic level. Considering estimation of phenotypic and genotypic variability, heritability and genetic advance along with correlation and path coefficients it could be concluded that filled grain panicle-1 would be the useful selection trait for improvement of the rice yield among the studied rice genotypes.Download