Editing Truncation selection (section)

== Animal and plant breeding ==
In [[animal breeding|animal]] and [[plant breeding]], truncation selection is a standard method. Animals are ranked by their phenotypic value on some trait such as milk production, and the top percentage is reproduced. The effects of truncation selection for a continuous trait can be modeled by the standard [[breeder's equation]] by using [[heritability]] and [[truncated normal distribution]]s. On a binary trait, it can be modeled easily using the [[liability threshold model]]. It is considered an easy and efficient method of breeding.<ref>Crow & Kimura 1979, [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC382946/ "Efficiency of truncation selection"]</ref>