Use Narrow-Sense Heritability when you need to compute narrow-sense heritability as the ratio of additive genetic variance to phenotypic variance. Enter Additive genetic variance and Phenotypic variance using the definitions and units below so the result can be reproduced.

Additive genetic variance

A finite measured or assumed value.

Phenotypic variance

A finite measured or assumed value.

The published tool contract uses this rule: Compute narrow-sense heritability as the ratio of additive genetic variance to phenotypic variance.

Narrow-sense heritability

The calculated narrow-sense heritability.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Additive genetic variance and Phenotypic variance values and their units alongside the result. Broad-Sense Heritability is useful when you instead need to compute broad-sense heritability as the ratio of total genotypic variance to phenotypic variance. Realized Heritability provides another view by helping you compute realized heritability as the signed selection response divided by the selection difference.

• Broad-Sense Heritability

  Compute broad-sense heritability as the ratio of total genotypic variance to phenotypic variance.

• Realized Heritability

  Compute realized heritability as the signed selection response divided by the selection difference.

• Additive Variance Component

  Derive the additive genetic variance by subtracting dominance and epistatic components from the total genetic variance.