Molecular analysis reveals tighter social regulation of immigration in patrilocal populations than in matrilocal populations
Molecular analysis reveals tighter social regulation of immigration in patrilocal populations than in matrilocal populations
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DOI：
10.1073/pnas.0409253102
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发表时间：
2005-05-24
影响因子：
11.1
通讯作者：
Excoffier, L
中科院分区：
文献类型：
--
作者：
Hamilton, G;Stoneking, M;Excoffier, L
人类社会组织可以深刻影响遗传多样性的水平。这一事实意味着遗传信息可以用来研究社会结构，这是民族遗传学的基础。最近，人们开发出了一些方法，可以从细分人群收集的遗传数据中提取这些信息，这些细分人群经历了最近的空间扩张，这是大多数人类群体的典型特征。在这里，我们对泰国北部的三个母系群体和三个父系群体的线粒体和 Y 染色体多样性进行了贝叶斯分析，以推断每一代到达这些群体的男性和女性数量，并估计其范围扩张的年龄。我们发现，父系人口中的男性移民数量比母系人口少 8 倍，而父系人口中的女性移民数量比母系人口多 2.5 倍。除了提供人群中性别特异性扩散率的遗传量化之外，我们还发现，尽管男性和女性在父系人群之间的交换率相似，但进入父系人群的男性远少于女性。这一发现与以下假设相一致：在父系人口中，男性严格控制男性移民并促进女性移民，而在母系人口中，移民受到的监管要少得多。
Human social organization can deeply affect levels of genetic diversity. This fact implies that genetic information can be used to study social structures, which is the basis of ethnogenetics. Recently, methods have been developed to extract this information from genetic data gathered from subdivided populations that have gone through recent spatial expansions, which is typical of most human populations. Here, we perform a Bayesian analysis of mitochondrial and Y chromosome diversity in three matrilocal and three patrilocal groups from northern Thailand to infer the number of males and females arriving in these populations each generation and to estimate the age of their range expansion. We find that the number of male immigrants is 8 times smaller in patrilocal populations than in matrilocal populations, whereas women move 2.5 times more in patrilocal populations than in matrilocal populations. In addition to providing genetic quantification of sex-specific dispersal rates in human populations, we show that although men and women are exchanged at a similar rate between matrilocal populations, there are far fewer men than women moving into patrilocal populations. This finding is compatible with the hypothesis that men are strictly controlling male immigration and promoting female immigration in patrilocal populations and that immigration is much less regulated in matrilocal populations.