Journal
MOLECULAR BIOLOGY AND EVOLUTION
Volume 26, Issue 10, Pages 2197-2206Publisher
OXFORD UNIV PRESS
DOI: 10.1093/molbev/msp130
Keywords
Uyghur; Central Asia; SNP; haplotype sharing; forward-time simulation
Funding
- National Outstanding Youth Science Foundation of China [30625016]
- National Science Foundation of China [30890034]
- 863 Program [2007AA02Z312]
- Shanghai Leading Academic Discipline Project [B111]
- Center for Evolutionary Biology
- Shanghai Institutes for Biological Sciences
- Chinese Academy of Sciences [2008KIP311]
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The Uyghur (UIG) are a group of people primarily residing in Xinjiang of China, which is geographically located ill Central Asia, from where modern humans were presumably spread ill all directions reaching Europe, cast, and northeast Asia about 40 kya. A recent study suggested that the UIG are ancestry donors of the East Asian (EAS) gene pool. However,,in alternative hypothesis, that is, the UIG is all admixture population with both EAS and EUR ancestries is also supported by our previous studies. To test the two competing hypotheses, here we conducted a haplotype-sharing analysis (HSA) based on empirical and simulated data of high-density single nucleotide polymorphisms. Our results showed that more than 95% of UIG haplotypes could be found in either EAS or EUR populations, which contradicts the expectation of the null models assuming that UIG are donors. Simulation Studies further indicated that the proportion of UIG private haplotypes observed in empirical data is only expected in alternative models assuming that UIG is an admixture Population. Interestingly, the estimated ancestry contribution of 44%:56% (EAS:EUR) based on HSA is consistent with our previous estimation with STRUCTURE analysis. Although the history of UIGs could be complex, our method is explicit and conservative in rejecting the null hypothesis. We concluded that the gene pool of modern UIGs is more likely a sole recipient with contribution from both EAS and EUR.
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