Inbreeding Depression

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

Other articles related to "inbreeding depression, inbreeding, depression":

Species Not Subject To Inbreeding Depression
... Inbreeding depression is not a phenomenon that will inevitably occur ... deleterious alleles appearing through mutation) nor too small (resulting in outright inbreeding depression) ... island endemic populations, however, a high resistance to inbreeding depression is often seen ...
Mauritius Kestrel - Conservation
... While some apparent inbreeding depression was noted in the captive birds, it was certainly lower than might be expected given that the effective population ... However, the debilitating effects of DDT accumulation on the birds' health, and not inbreeding, are considered to have been the major cause for the failure of Temple's ... conditions were sustained for many generations, alleles that might cause inbreeding depression were steadily removed by means of natural selection ...
Small Population Size - Genetic Consequences
... Inbreeding — In a small population, related individuals are more likely to breed together ... consequence of loss of genetic variation Inbreeding depressionInbreeding depression is usually taken to mean any immediate harmful effect, on individuals or the ... Inbreeding depression can almost never be found in declining populations that were not very large to begin with it is somewhat common in large populations becoming small though ...
Schistocephalus Solidus
... but it is disadvantageous because of inbreeding depression—the reduced fitness of offsprings because of the unmasking of deleterious recessive alleles due to the breeding of closely related ... mating, also shares some of the same disadvantages as self-fertilization does—inbreeding depression and lack of genetic variation ... advantageous choice of mating because it increases genetic variation and avoids inbreeding depression, but it could be a very time consuming process ...
Outbreeding Depression
... A concept in biology, outbreeding depression refers to cases when offspring from crosses between individuals from different populations have lower fitness ... The concept is opposed to inbreeding depression ... A second way outbreeding depression can occur is by the breakdown of biochemical or physiological compatibilities between genes in the different breeding populations ...

Famous quotes containing the words depression and/or inbreeding:

    Someone is always at my elbow reminding me that I am the grand-daughter of slaves. It fails to register depression with me. Slavery is sixty years in the past. The operation was successful and the patient is doing well, thank you. The terrible struggle that made me an American out of a potential slave said “On the line!” The Reconstruction said “Go!” I am off to a flying start and I must not halt in the stretch to look behind and weep.
    Zora Neale Hurston (1891–1960)

    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)