Genetic interrelationship among yield and its components in rice hybrids

Abstract

The present investigation was conducted to elucidate the interrelationship among various yield and yield contributing traits. Among the traits plant height, days to 50% flowering, days to maturity, filled grain per panicle and spikelet sterility showed high genotypic variance. Effective tillers per hill, filled grain per panicle, spikelet sterility had high genotypic coefficient of variation with high heritability and high genetic advance per cent of mean. Effective tillers per hill, panicle length, filled grain per panicle and 1000-grain weight exhibited significant positive association with grain yield. Path coefficient analysis also revealed that plant height, effective tillers per hill, panicle length and 1000-grain weight had higher direct effect on rice yield (t/ha). Days to 50% flowering, days to maturity and spikelet sterility possessed moderate to low negative direct effect on rice yield. All together with the genetic variability, correlation and path analysis revealed that plant height, effective tillers per hill, panicle length, filled grain per panicle and 1000-grain weight were the most important yield component in rice hybrids.

Traits association and path coefficient analysis of yield and yield attributing traits of upland rice (Oryza sativa L.) genotypes at pawe, northwestern Ethiopia

“…Hence, when performing selection to increase grain output, it is important to give attention to these traits because their positive direct effects on grain yield demonstrated their significance in determining this complex feature. In agreement with the findings of this study, positive direct effects of biomass, harvest index, days to maturity, productive tillers, field grain, panicle length and unfilled grain per panicle were reported by different authors (Yadav et al, 2010;Sarker et al, 2014;Roy et al, 2015;Hossain et al, 2018;Hasan et al, 2019;Abebe et al, 2019;Zhao et al, 2020;Belete et al, 2022). Path coefficient analysis for both genotypic and phenotypic levels revealed that nonproductive tillers, grain shape, grain width, plant height, thousand grain weight, and crude protein content were traits that had a negative direct effect on grain yield.…”

Assessment of genetic variability and diversity analysis in medium duration rice accessions

“…Therefore, we can adopt simple selection methods by using these highly heritable traits for yield improvement. Similar results with high heritability estimates were reported by Hasan et al (2019) and Roy and Shil (2020) supports our findings.…”

Comprehensive Assessment of the Genotype‐Environment Interaction and Yield Stability of Boro Rice Genotypes under Four Environments in Bangladesh Using AMMI Analysis

“…Simple measurements of variability, particularly the genotypic and phenotypic coefficients of variation, are commonly utilized for genotype evaluation [ 28 ]. These relative values offer insights into the extent of genetic diversity within a population.…”

“…The phenotypic variance was notably greater than the genotypic variance, indicating the influence of both genetic factors and environmental conditions on the expression of the trait under scrutiny. Tewachewu et al [ 29 ] and Hasan et al [ 28 ] reported low variance components for panicle length. Upon analyzing the data above, it became evident that genetic parameters of variance were estimated for all traits across each environment.…”