Inbreeding depression is the reduced fitness in a given population as a result of breeding of related individuals. It is often the result of a population bottleneck. In general, the higher the genetic variation within a breeding population, the less likely it is to suffer from inbreeding depression.
Inbreeding depression seems to be present in most groups of organisms, but varies across mating systems. Hermaphroditic species often exhibit lower degrees of inbreeding depression than outcrossing species, as repeated generations of selfing is thought to purge deleterious alleles from populations. For example, the outcrossing nematode Caenorhabditis remanei has been demonstrated to suffer severely from inbreeding depression, unlike its hermaphroditic relative C. elegans, which experiences outbreeding depression.
Read more about Inbreeding Depression: Mechanisms, Inbreeding Depression and Natural Selection, Managing Inbreeding Depression, In Humans, Species Not Subject To Inbreeding Depression
Famous quotes containing the words inbreeding and/or depression:
“Be reflective ... and stay away from the theater as much as you can. Stay out of the theatrical world, out of its petty interests, its inbreeding tendencies, its stifling atmosphere, its corroding influence. Once become “theatricalized,” and you are lost, my friend; you are lost.”
—Minnie Maddern Fiske (1865–1932)
“Geez, if I could get through to you, kiddo, that depression is not sobbing and crying and giving vent, it is plain and simple reduction of feeling. Reduction, see? Of all feeling. People who keep stiff upper lips find that it’s damn hard to smile.”
—Judith Guest (b. 1936)