GENETIC VARIABILITY, HERITABILITY AND GENETIC ADVANCE OF SOME PROMINENT ADVANCED LINES OF UPLAND RICE (BROADCAST AUS) GENOTYPES

An experiment was conducted at Plant Breeding Division, BRRI, Bangladesh during the Aus season of 2018 to study the genetic variability and inheritance of seventeen advanced lines of upland rice (Oryza sativa L.) by Randomized Complete Block Design (RCBD). The number of Grains per panicle showed the highest variation (70.67-123.67). The genotype G-8 showed the best performance for number of effective tiller, panicle weight, number of grain per panicle, and total spikelet per plant. In terms of early maturity (50% DF and DM), panicle length and grain yield, best performance was obtained from the genotype G-15. From the present study, effective tiller number, panicle weight, total spikelet per panicle, and grain yield showed high heritability estimates along with high genetic advance. These characters also exerted moderate to high direct effects on the grain yield. From the association study, the grain yield was found highly significant, positive, genotypic and phenotypic correlation with the effective tiller, panicle length, panicle weight, grains per panicle, total spikelet per panicle and spikelet fertility percentage. The genotypic path coefficient analysis showed that the top most significant maximum direct effect (1.6859) was found for number of grains per panicle.