GENETIC DRIFT AND THE LOSS OF ALLELES VERSUS HETEROZYGOSITY
GENETIC DRIFT AND THE LOSS OF ALLELES VERSUS HETEROZYGOSITY
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DOI：
10.1002/zoo.1430050212
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发表时间：
1986-01-01
期刊：
影响因子：
1.3
通讯作者：
ALLENDORF, FW
中科院分区：
文献类型：
--
作者：
ALLENDORF, FW
大多数关于种群数量瓶颈造成的遗传变异损失的研究都使用杂合度作为遗传变异的衡量标准。在这篇文章中，我比较了瓶颈对等位基因丢失以及杂合度降低的影响。持续时间短的群体瓶颈对杂合度的影响不大，但预计会严重减少存在的等位基因数量。杂合度提供了一个很好的衡量群体在遇到瓶颈后立即对选择做出反应的能力。然而，剩余等位基因的数量对于种群和物种对选择和生存的长期反应是重要的。
Most studies of the loss of genetic variation caused by bottlenecks in population size have used heterozygosity as a measure of genetic variation. In this paper, I compare the effects of bottlenecks on the loss of alleles, as well as the reduction in heterozygosity. Population bottlenecks of short duration will have little effect on heterozygosity but are expected to reduce severely the number of alleles present. Heterozygosity provides a good measure of the capability of a population to respond to selection immediately following a bottleneck. However, the number of alleles remaining is important for the long‐term response to selection and survival of populations and species.