INBREEDING AND EXTINCTION - A THRESHOLD EFFECT
INBREEDING AND EXTINCTION - A THRESHOLD EFFECT
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DOI：
10.1046/j.1523-1739.1995.09040792.x
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发表时间：
1995-08-01
影响因子：
6.3
通讯作者：
FRANKHAM, R
中科院分区：
文献类型：
--
作者：
FRANKHAM, R
在保护生物学中应用遗传学的一个基本假设是，近亲繁殖增加了灭绝的风险。然而，没有关于这种关系的信息，现有的证据没有区分遗传和非遗传效应，这个问题是有争议的。virilis和Mus musculus。在所有情况下，近亲繁殖都显著增加了灭绝率。所有表现出阈值之间的关系，增量灭绝和近交低初始灭绝，但他们表现出显着增加灭绝开始在中间水平的近亲繁殖。灭绝水平没有差异，在相似的近亲繁殖系数在不同的速度（全同胞与双第一堂兄弟姐妹）的群体近交。濒临灭绝的物种几乎不会因为近亲繁殖而发出濒临灭绝的警告。
A fundamental assumption underlying the application of genetics within conservation biology is that inbreeding increases the risk of extinction. However, there is no information on the shape of the relationship, the available evidence has not distinguished genetic and nongenetic effects, and the issue is controversial Methods were devised to separate genetic and nongenetic causes of extinction in inbred populations, and they were used to analyze data from Drosophila melanogaster, D. virilis, and Mus musculus. Inbreeding markedly increased rates of extinction in all cases. All showed a threshold relationship between incremental extinction and inbreeding with low initial extinction, but they showed notably increased extinction beginning at intermediate levels of inbreeding There was no difference in extinction levels at similar inbreeding coefficients in populations inbred at different rates (full sibling versus double first cousin). Endangered species my give little warning of impending extinction crises due to inbreeding.