Managing Inbreeding Depression
Introducing alleles from a different population can reverse inbreeding depression. Different populations of the same species have different deleterious traits, and therefore their crossbreeding will not result in homozygosity in most loci in the offspring. This is known as outbreeding enhancement, practiced by conservation managers and zoo captive breeders to prevent homozygosity.
However, intermixing two different populations may give rise to unfit polygenic traits in outbreeding depression, yielding offspring which lack the genetic adaptations to specific environmental conditions. These, then, will have a lowered fitness than pure-bred individuals e.g. of a particular subspecies that has adapted to its local environment.
Read more about this topic: Inbreeding Depression
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