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首页> 外文期刊>PLoS Genetics >Global Patterns in Human Mitochondrial DNA and Y-Chromosome Variation Caused by Spatial Instability of the Local Cultural Processes
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Global Patterns in Human Mitochondrial DNA and Y-Chromosome Variation Caused by Spatial Instability of the Local Cultural Processes

机译：人类线粒体DNA和Y染色体变异的全球格局，由当地文化进程的空间不稳定性引起

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Because of the widespread phenomenon of patrilocality, it is hypothesized that Y-chromosome variants tend to be more localized geographically than those of mitochondrial DNA (mtDNA). Empirical evidence confirmatory to this hypothesis was subsequently provided among certain patrilocal and matrilocal groups of Thailand, which conforms to the isolation by distance mode of gene diffusion. However, we expect intuitively that the patterns of genetic variability may not be consistent with the above hypothesis among populations with different social norms governing the institution of marriage, particularly among those that adhere to strict endogamy rules. We test the universality of this hypothesis by analyzing Y-chromosome and mtDNA data in three different sets of Indian populations that follow endogamy rules to varying degrees. Our analysis of the Indian patrilocal and the matrilocal groups is not confirmatory to the sex-specific variation observed among the tribes of Thailand. Our results indicate spatial instability of the impact of different cultural processes on the genetic variability, resulting in the lack of universality of the hypothesized pattern of greater Y-chromosome variation when compared to that of mtDNA among the patrilocal populations.
机译：由于普遍存在着父系异位现象，据推测，Y染色体变异体的地理定位往往比线粒体DNA（mtDNA）的变异性更大。随后在泰国的某些父本和母本集团中提供了证实这一假设的经验证据，这符合通过基因扩散的距离模式进行的隔离。但是，我们直觉地期望，在具有不同婚姻规范社会规范的人群中，尤其是那些遵守严格的内婚制的人群中，遗传变异的模式可能与上述假设不一致。我们通过分析三组不同程度遵循内配规则的印度人口中的Y染色体和mtDNA数据，检验了该假设的普遍性。我们对印度的宗族和母裔群体的分析并不能证实泰国部落之间观察到的性别差异。我们的结果表明，不同文化进程对遗传变异性的影响在空间上是不稳定的，从而导致与父系人群中的mtDNA相比，更大的Y染色体变异的假设模式缺乏普遍性。

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