Use Realized Heritability when you need to compute realized heritability as the signed selection response divided by the selection difference. Enter Response R and Selection difference S using the definitions and units below so the result can be reproduced.

Response R

A finite measured or assumed value.

Selection difference S

A finite measured or assumed value.

The published tool contract uses this rule: Compute realized heritability as the signed selection response divided by the selection difference.

Realized heritability

The calculated realized 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 Response R and Selection difference S 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. Narrow-Sense Heritability provides another view by helping you compute narrow-sense heritability as the ratio of additive genetic variance to phenotypic variance.

• Broad-Sense Heritability

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

• Narrow-Sense Heritability

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

• Breeding Value EBV

  Estimate an individual breeding value as heritability times the signed phenotype deviation from the population mean.