Use Selection Differential when you need to compute the signed selection differential as the mean of selected parents minus the population mean. Enter Mean of selected parents and Population mean using the definitions and units below so the result can be reproduced.

Mean of selected parents

A finite measured or assumed value.

Population mean

A finite measured or assumed value.

The published tool contract uses this rule: Compute the signed selection differential as the mean of selected parents minus the population mean.^[1]

Selection differential

The calculated selection differential.

The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability.

Retain the original Mean of selected parents and Population mean values and their units alongside the result. Response To Selection is useful when you instead need to compute the breeder's equation response to selection as heritability times the signed selection differential. Selection Intensity i provides another view by helping you compute the standardized selection intensity as the signed selection difference divided by the phenotypic standard deviation.

• Response To Selection

  Compute the breeder's equation response to selection as heritability times the signed selection differential.

• Selection Intensity i

  Compute the standardized selection intensity as the signed selection difference divided by the phenotypic standard deviation.

• Selection Coefficient

  Compute the selection coefficient s = 1 - w from a relative fitness w between 0 and 1.