Flashball
04-10-2022, 08:01 AM
NIHMS1502262
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6168346/
We confirm that Sardinians have the highest observed levels of shared drift with early Neolithic farming cultures (represented by the LBK380 sample from Stuttgart, Germany20; hereafter referred to as “Stuttgart”) and relatively low levels of shared drift with earlier hunter-gather cultures (represented by an aDNA sample from Loschbour rock shelter in Luxembourg20; hereafter referred to as “Loschbour”) (Figure 6A, Figure S8). As expected, the Neolithic farmer ancestry component is more abundant than the hunter-gatherer ancestry component across all Sardinian populations (Table S4). Surprisingly though, using supervised estimation of ancestry proportions18 based on aDNA, we found an indication of higher levels of Neolithic and pre-Neolithic ancestries in the Gennargentu-region, and higher levels of Steppe Pastoralist ancestry outside the region (Figure S9, Table S5). Investigating this further, we find that shared drift with Neolithic farmers and with pre-Neolithic hunter-gatherers are significantly correlated with the proportion of “Gennargentu-region” ancestral component estimated from ADMIXTURE analysis, while that with Steppe pastoralists is weakly negative and non-significantly correlated with Gennargentu-region ancestry ( |Z| > 6 for Neolithic farmers and pre-Neolithic hunter-gatherers, |Z| < 2 for Steppe pastoralists; Figure 6B, Table S6). Moreover, D-statistics of the form D(Outgroup, Ancient, Ogliastra, Non-Ogliastra) also support increased sharing with Neolithic and pre-Neolithic individuals, but not post-Neolithic individuals from the Steppe, in the Ogliastra samples (D = −0.0029 and −0.0035, |Z| = 6.1 and 6.8 when aDNA sample = Stuttgart and Loschbour, respectively; D = −0.0002, |Z| = 0.7, when aDNA sample = Yamnaya).
This could be slightly less or more depending on the WHG sample, but it is still significant compared to other areas of Sardinia where the intake seems variable, here in this model we are from 0 to 17% using a sample Loschbour.
https://pbs.twimg.com/media/FPwfYbpWQAEjxld?format=png&name=4096x4096
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6168346/
We confirm that Sardinians have the highest observed levels of shared drift with early Neolithic farming cultures (represented by the LBK380 sample from Stuttgart, Germany20; hereafter referred to as “Stuttgart”) and relatively low levels of shared drift with earlier hunter-gather cultures (represented by an aDNA sample from Loschbour rock shelter in Luxembourg20; hereafter referred to as “Loschbour”) (Figure 6A, Figure S8). As expected, the Neolithic farmer ancestry component is more abundant than the hunter-gatherer ancestry component across all Sardinian populations (Table S4). Surprisingly though, using supervised estimation of ancestry proportions18 based on aDNA, we found an indication of higher levels of Neolithic and pre-Neolithic ancestries in the Gennargentu-region, and higher levels of Steppe Pastoralist ancestry outside the region (Figure S9, Table S5). Investigating this further, we find that shared drift with Neolithic farmers and with pre-Neolithic hunter-gatherers are significantly correlated with the proportion of “Gennargentu-region” ancestral component estimated from ADMIXTURE analysis, while that with Steppe pastoralists is weakly negative and non-significantly correlated with Gennargentu-region ancestry ( |Z| > 6 for Neolithic farmers and pre-Neolithic hunter-gatherers, |Z| < 2 for Steppe pastoralists; Figure 6B, Table S6). Moreover, D-statistics of the form D(Outgroup, Ancient, Ogliastra, Non-Ogliastra) also support increased sharing with Neolithic and pre-Neolithic individuals, but not post-Neolithic individuals from the Steppe, in the Ogliastra samples (D = −0.0029 and −0.0035, |Z| = 6.1 and 6.8 when aDNA sample = Stuttgart and Loschbour, respectively; D = −0.0002, |Z| = 0.7, when aDNA sample = Yamnaya).
This could be slightly less or more depending on the WHG sample, but it is still significant compared to other areas of Sardinia where the intake seems variable, here in this model we are from 0 to 17% using a sample Loschbour.
https://pbs.twimg.com/media/FPwfYbpWQAEjxld?format=png&name=4096x4096