Use this population- or quantitative-genetics calculation when genotype counts, variance components, pedigree relationships, and ploidy follow the definitions assumed by the tool.

Total genetic variance

A finite measured or assumed value greater than or equal to 0.

Dominance variance

A finite measured or assumed value greater than or equal to 0.

Epistatic variance

A finite measured or assumed value greater than or equal to 0.

The implementation follows this calculation rule: Derive the additive genetic variance by subtracting dominance and epistatic components from the total genetic variance.

Additive variance

The calculated additive variance.

Allele frequencies and genetic parameters describe the sampled population and model. Population structure, relatedness, selection, genotyping error, non-random mating, environmental covariance, and omitted variance components can bias interpretation. Preserve the input values and units so the result can be audited and recalculated.

Inspect genotype counts and Hardy–Weinberg diagnostics, or fit a pedigree/genomic mixed model when individual records are available. Confidence intervals and replication across populations are more informative than a point estimate alone.

• Dominance Variance Share

  Express the dominance variance component as a percentage of the total genetic variance.

• Epistasis Variance Share

  Express the epistatic variance component as a percentage of the total genetic variance.

• Narrow-Sense Heritability

  Compute narrow-sense heritability as the ratio of additive genetic variance to phenotypic variance.