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.