Genetic variability, heritability and genetic advance for yield and its contributing traits in rice (Oryza sativa L.)

Abstract

The experiment on 125 genotypes (20 lines, 5 tester and 100 F1's) including a check viz., Pusa Basmati 6 of rice (Oryza sativa L.) was conducted to work out the genetic variability, heritability and genetic advance effects of their various attributes on grain yield. The mean squares due to treatments, parents and crosses were highly significant for all the fifteen characters indicated the presence of sufficient variability in the study materials. PCV was higher than the genotypic GCV for all the traits. High heritability (>60%) were recorded for characters viz., grains per panicle, spikelets per panicle, L:B ratio, kernel length, panicle length, kernel breadth, flag leaf area, grain yield per plant, plant height, panicle bearing tillers per plant, 1000-grain weight, harvest-index and spikelet fertility. The high genetic advance in percent of mean (>20) was recorded for grains per panicle fallowed by spikelet's per panicle and L:B ratio for this parameter. High heritability coupled with high genetic advance in per cent of mean were observed for the characters like grains per panicle, spikelets per panicle, and L:B ratio. High heritability and genetic advance account that the additive nature of gene action and so that these characters are directly selecting for further advancement of rice crop.

Impacts of Drought Stress on Water Use Efficiency and Grain Productivity of Rice and Utilization of Genotypic Variability to Combat Climate Change

“…The days to maturity and water consumption indicated higher GA under both treatments. A higher H 2 and high GA of days to maturity and water consumption exhibited that these traits were controlled by additive gene impacts, and similar findings for the agronomic traits of rice crops have also been reported by Chuchert et al [27], Sumanth et al [74] and Vange [75].…”

Evaluation of some promising indigenous brinjal genotypes under terai region of West Bengal

“…In case of calyx length, similar high estimated in present investigation which was also reported earlier by Kumar et al (2013). The average fruit diameter was observed 6.28 cm, ranging from 3.16 to 11.88 cm with high estimates for all the genetic parameters and this high GCV and PCV was also reported by the Yadav et al (2016). High GCV (28.64%) and PCV (28.65%) coupled with high heritability (99.91%) and GAM (58.97%) was recorded for fruit length.…”

“…Kumar et al (2013) and Lokesh et al (2013) in earlier also reported high GCV and PCV for fruit length in brinjal in their experiment. For fruit weight, high GCV (60.25%), PCV (60.25%),heritability (99.98%) and high GAM (124.10%) was observed which were in conformity with the earlier finding of Kumar et al (2012) and Yadav et al (2016). Whereas, high heritability coupled with GAM was reported by Muniappan et al (2010).…”

“…Numbers of fruit per plant exhibited high estimatesfor all the genetic parameters which were in accordance with the findings of Madhavi et al (2015). Also, high heritability coupled with GAM for fruit numbers per plant was obtained earlier by Lokesh et al (2013) and Yadav et al (2016). The mean varietal performance of fruit yield was 18.48 tonnes per hectare ranged from 5.28 to 42.31 tonnes per hectare.…”

Heritability and Correlation Among Physiological and Yield Traits in Chickpea (Cicer arietinum L.)

“…Greater heritability marks the effectiveness of selection in improving a trait in the population (Acquaah, 2012). Mathematically, it is the ratio between genetic and phenotypic variance, which is generally categorized as high (above 60%), medium (30-60%), and low (below 30%) (Kumar et al, 2020).…”