Others may be more confusing because of the obscurity of the populations, but the Burusho clearly have ancient East Asian ancestry on clustering algorithms, so their presence is not surprising to me.
Similarly, the Russians in the HGDP data set have an ‘eastern’ affinity (or at least some do), either due to Finno-Ugric or Turkic ancestry (Tatars regularly assimilated into a Russian ethnic identity as the Tsars expanded their domains).
On the other hand I have always appreciated that a benefit of this injustice to the methods which make insight possible is that those without academic access can actually bite into the meat of the researcher’s mode of thought. That has to end now, because the authors have finally released a software package which implements the statistics, ADMIXTOOLS.
I plan to use it in the near future, and it is generally best if you understand the underlying mechanisms of a software package if you are at the bleeding end of analytics.
Some of Mongolian and Turkic peoples have individuals who are attested as having characteristics more typical of Europeans (e.g., red hair), so it is likely that this admixture was relatively old and widespread, well before the era of the Pax Mongolica.
The Xibo and Tu are Northeast Asian groups, on the border between China proper and the great Eurasian interior.In the basics the tests are seeing if a model fits the data (as opposed to Tree Mix, which finds the best model out of a range to fit the data).The last method, , infers the timing of an admixture event based upon the decay of linkage disequilibrium.There is surely artistic license, but they look rather East Asian to me, as opposed to the hybrid Eurasian appearance modal among modern Uygurs.I won’t touch upon the rather fraught and complex ethnology and ethnogenesis of modern Uygurs, and their relationship to Russian and Chinese ethnographers, but suffice it to say that one needs to be careful about excessive reliance on the literality of historical documents in this area, because of semantic confusions.In short, admixture between two very distinct populations has the concrete result of producing striking genomic correlations.