What does this research mean for the field?

Traits such as grain shape, productive tiller number, and grain dimensions exhibit high heritability and genetic advance in diverse rice genotypes, with days to maturity and grain shape acting as key direct contributors to grain yield. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To assess genetic variability, heritability, and trait relationships across diverse rice genotypes to identify superior lines and guide breeding strategies.

August 22, 2026Agrosystems Geosciences & EnvironmentOpen Access

Genetic variability, heritability, and trait associations for yield and grain dimensions in diverse rice genotypes

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MMMostafa ModarresiAgricultural Research & Education Organization

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Implication

Agronomic evaluation demonstrates high heritability and key yield determinants in diverse rice genotypes, suggesting direct phenotypic selection can optimize crop breeding.

Key Points

To assess genetic variability, heritability, and trait relationships across diverse rice genotypes to identify superior lines and guide breeding strategies.
Evaluated 27 rice (Oryza sativa L.) genotypes across the 2021–2023 cropping seasons for nine agronomic and grain dimension traits.
Calculated broad-sense heritability and genetic advance as a percentage of the mean (GA%), and conducted correlation, path, and hierarchical cluster analyses.
Grain yield ranged from 4.38 t/ha (Gerdeh) to 7.73 t/ha (Shiroudi) with a mean of 6.052 t/ha, displaying high broad-sense heritability across all traits (H² = 0.926–1.0).
Grain yield significantly correlated with days to maturity (r = 0.532, p < 0.01), 1000-grain weight (r = 0.266, p < 0.05), grain length (r = 0.269, p < 0.05), grain shape (r = 0.269, p < 0.05), and awn length (r = −0.406, p < 0.01).
Path analysis identified days to maturity (direct effect = 0.341, p < 0.001) and grain shape (0.241) as primary yield drivers, with Cluster 4 genotypes (Shiroudi, Keshvari, Neda) exhibiting top yield performance.

Cite This Study

Mostafa Modarresi (2026) studied this question.

synapsesocial.com/papers/6a895f41ca7ade938187dbd9 https://doi.org/10.1002/agg2.70433

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Implication

Agronomic evaluation demonstrates high heritability and key yield determinants in diverse rice genotypes, suggesting direct phenotypic selection can optimize crop breeding.

Genetic variability, heritability, and trait associations for yield and grain dimensions in diverse rice genotypes

Discussion

Member takes

Implication

Key Points

Cite This Study

Genetic variability, heritability, and trait associations for yield and grain dimensions in diverse rice genotypes

Discussion

Member takes

Implication

Key Points

Cite This Study

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