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Ancient Tanzanian Pastoralist results... VERY interesting stuff!
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[QUOTE]Originally posted by capra: [QB] See "Ancestry model and estimates with [i]qpAdm[/i]" under Methods. IIUC basically the qpAdm program runs f4 statistics, a measure of relatedness, between the target (in this case T_L_3100BP) and a set of outgroup populations. It then takes a set of potential source populations that you give it and creates virtual mixes from them. It calculates f4s between the virtual mix and the same set of outgroups, and compares them to the f4s determined for the actual target sample. A successful mix will have approximately matching f4 values, that is the same set of relationships with the outgroups as the target sample does. So if for instance T_L_3100Bp was more closely related to West Africans than a mix of 38% PPNB and 62% Mota would be, that would show up in her having a stronger f4 with Mende than the mixture does. Or if she had not PPNB but say pure Basal Eurasian or super-Natufian or something like that, she would have a weaker f4 with Loschbour, Anatolia Neolithic, and so forth than the mix would have. So it doesn't mean that she is literally a mix of Mota and PPNB but it can't really be something too crazy different from that. Look at the list of outgroup populations in the Methods to see what the constraints are. [/QB][/QUOTE]
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