Thursday, June 30, 2016
The Natufian puzzle
One of the biggest surprises in the new Lazaridis et al. preprint is that the Natufians don't show any Sub-Saharan African admixture when poked and prodded directly with formal statistics. However, TreeMix, which runs on formal statistics, doesn't have much trouble finding Sub-Saharan or related ancestry in both the Natufians and Neolithic farmers from the Levant. So what's going on? Also worth noting in the fourth graph is the heavy migration edge from near the base of the East Eurasian Dai/Han branch to the early Neolithic farmers from Iran. My bet is that this is a signal of admixture from a Central Asian forager population, perhaps representing a parallel clade to that of the East Asians? Or is it just Ancient North Eurasian (ANE) admixture? I'll try and investigate that soon.