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Miao-Yao populations and y hg O3-M7+
Topic Started: Aug 31 2007, 09:10:12 PM (712 Views)
black man
The Right Hand
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We know from the papers by Karafet et al. (2001, 2006 and 2010) and Xue et al. (2006) that Miao-Yao populations possibly typically have high percentages of men in y hg O3-M7+ in combination with LY1+. Now, LY1+ is no longer tested by some teams (such as Karafet et al.) because there were two or more mutation events at that location. But there are still some HM data from the papers of Chen et al. 2006, Yang et al. 2005 etc which confirm that M7+ is typically present at high frequencies among certain Miao-Yao.

But what about other Miao-Yao populations? There are these data as well...

- Kimmun (pooled): 1/101=1,0% (Cai et al. 2011)
- Hunan Miao: 2/105=1,9% (Shi Hong et al. 2005)
- Guangxi Yao: 6/225=2,7% (Shi Hong et al. 2005)
- Miao of NW Hunan: 4/100=4% (Cai et al. 2011)
- Miao of central eastern Guizhou (i.e., close to Hunan): 2/49=4,1% (Cai et al. 2011)
- Hunan Yao: 1/20=5% (Shi Hong et al. 2005)

Obviously, HM populations are prone to patriliny and patrilocality. This might explain y hg profile deviations of individual populations. But even when we pool samples, there seem to Miao-Yao populations in which the M7+ mutation is rare to absent, such as the Kimmun (a Hmong-Mien-internal linguistic cluster which is geographically scattered) and the Miao-Yao populations of Hunan. Similarly, there are, as a whole, just intermediate frequencies of the M7+ among the Miao-Yao of Guangxi and Yunnan who were examined by Cai et al.

The only Miao-Yao populations as for which Cai et al. confirmed high frequencies of M7+ carriers are a Mienic Zaomin sample from northern Guangdong and a She sample of Zhejiang. Furthermore, Xue et al. confirmed high percentages of M7+ men in a She sample from Fujian (according to table 2) or Zhejiang (according to figure 2A), in a Bama Yao sample from central northern Guangxi and in a Liannan Yao sample from northern Guangdong. Three more Yao populations having such a y hg profile dominated by M7+ carriers seem to reside in Libo county of southern Guizhou. Possibly, their y hg distribution had an impact on the neighbouring Bunu in northern Guangxi. But the sample examined by Cai et al. doesn't allow any definite statement concerning this because its size is too small. So at least one can dare to suppose that...
- certain eastern Mienic-speakers and She people in a region from northern Guangdong to Zhejiang contribute to a Miao-Yao y hg profile featuring high frequencies of M7+ men. - a second geographical cluster of M7+ carriers might be in southern Guizhou.

Moreover, Wenshan prefecture appears to be a region where M7+ are more or less frequent in the Miao (Yang et al. 2005, apparently also Cai et al. 2011). Maybe this region is where the ancestors of the Hmong Daw (one third of 51 men in hg O3-M7+ according to Cai et al.) came to Laos.

Btw, M7+ seems to occur at intermediate frequencies in populations from the Yi, Bai and other Tibeto-Burmese minzu in central Yunnan (Yang et al. 2005). But it become rare in southern Yunnan (Yang et al., Cai et al.) and northern Laos (Cai et al.). The MK M7+ carriers examined by Cai et al. are mostly from the southern part of Laos, i.e., closer to the Cambodian border than to the Chinese border of Laos.
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