Mathematical constraints on F(ST): multiallelic markers in arbitrarily many populations.

Mathematical constraints on F(ST): multiallelic markers in arbitrarily many populations.
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F(ST)的数学约束:任意多个群体中的多等位基因标记。

DOI:
10.1098/rstb.2020.0414
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发表时间:
2022-06-06
期刊:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子:
--
通讯作者:
Rosenberg NA
Rosenberg NA
中科院分区:
其他
文献类型:
--
作者:
Alcala N;Rosenberg NA

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对遗传分化FST指标值的解释依赖于对其数学约束的理解。先前,已经表明,从一组多个群体中的双等位基因基因座计算的FST值和从一对群体中的多等位基因座计算的FST值在数学上被约束为在群体中最频繁的等位基因的频率的函数。我们从这些案例中进行概括,在这里报告FST的数学约束,给定一组多个群体中多等位基因位点上最常见的等位基因的频率M。使用一个岛屿模型的迁移与无限多等位基因突变模型的结合模拟,我们认为,FST和M的联合分布有助于解开突变和迁移对FST的单独影响。最后,我们表明,我们的研究结果解释了一个令人困惑的模式的微卫星分化:较低的FST在种间比较人类和黑猩猩比黑猩猩种群。我们讨论了我们的研究结果的FST的使用的影响。这篇文章是主题问题的一部分,“庆祝Lewontin对人类多样性的分配50周年”。
Interpretations of values of the FST measure of genetic differentiation rely on an understanding of its mathematical constraints. Previously, it has been shown that FST values computed from a biallelic locus in a set of multiple populations and FST values computed from a multiallelic locus in a pair of populations are mathematically constrained as a function of the frequency of the allele that is most frequent across populations. We generalize from these cases to report here the mathematical constraint on FST given the frequency M of the most frequent allele at a multiallelic locus in a set of multiple populations. Using coalescent simulations of an island model of migration with an infinitely-many-alleles mutation model, we argue that the joint distribution of FST and M helps in disentangling the separate influences of mutation and migration on FST. Finally, we show that our results explain a puzzling pattern of microsatellite differentiation: the lower FST in an interspecific comparison between humans and chimpanzees than in the comparison of chimpanzee populations. We discuss the implications of our results for the use of FST. This article is part of the theme issue ‘Celebrating 50 years since Lewontin's apportionment of human diversity’.
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