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The genetic structure of the world’s first farmers - Iosif Lazaridis
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[QUOTE]Originally posted by xyyman: [QB] Follow the bread crumbs youngsta. This paper confirms what I have been saying. It is nothing new. Except they now revealed the DNA of the Natufians which is essentially PN2....as expected. QUOTE ===== Two inferred edges were unexpected. First, perhaps the most surprising inference is that Cambodians trace about 16% of their ancestry to a population equally related to both Europeans and other East Asians (while the remaining 84% of their ancestry is related to other southeast Asians). This is partially consistent with clustering analyses, which indicate shared ancestry between Cambodians and central Asian populations [7]. To confirm that the Cambodians are admixed, we turned to less parameterized models. [b]The predicted admixture event implies that allele frequencies in Cambodia are more similar to those in African populations than would be expected[/b] based on their East Asian ancestry. To test this, we used three-population tests [37]. We tested the trees [African, [Cambodian,Dai]] for evidence of admixture in the Cambodians (Methods). When using any African population, there is strong evidence of admixture (when using Yoruba, Z~{7:0 [p~1|10{12]; when using Mandenka, Z~{7:3 [p~1|10{12]; when using San, Z~{4:8 [p~8|10{7]). We conclude that the Cambodian population is the result of an admixture event involving a southeast Asian population related to the Dai and a Eurasian population only distantly related to those present in these data. Finally, we infer an admixture edge from the Middle East [b](a population related to the Mozabite, a Berber population from northern Africa) ******to***** southern European populations (w~22%).[/b] This migration edge is the one edge that is not consistent across independent runs of TreeMix on these data (Figure S8). In particular, an alternative graph (albeit with lower likelihood)[b] places the Mozabite as an admixture between southern Europe and Africa *****(RATHER ******than the Middle East and Africa), and does NOT include an edge from the middle East to southern Europe.[/b] WE THUS HESITATE TO INTERPRET THIS RESULT, except to note that the relationship between northern African, the Middle East, and southern Europe involves complex patterns of gene flow that merit further investigation [43,57]. Read more: http://egyptsearchreloaded.proboards.com/thread/1767/screw-lazaridis-latest-update-sept#ixzz4Bvbuyd6b [/QB][/QUOTE]
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