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6/12/2025, 9:29:31 PM
>>17758658
>>17758733
>There is an axis of significant genetic differentiation along the east–west direction, in contrast to remarkable genetic similarity in the north–south direction. North African admixture, associated with the Islamic conquest, can be dated to the period between c. AD 860–1120
>To distinguish between possible scenarios that could produce these patterns, we applied the GLOBETROTTER method to each of our six clusters (Methods). GLOBETROTTER infers dates of admixture and the make-up of the source populations, and tests whether admixture patterns are consistent with a simple mixing of two groups at a single time in the past, compared to more complex alternative models. GLOBETROTTER found strong evidence (p<0.01) of admixture for all six clusters.
>For all six clusters, an extremely similar event was inferred, in a tight time-range of 860–1120 CE, and with similar source groups, present in varying proportions (4–10% for the minor group). The major source was inferred to contain almost exclusively European donor groups, and the minor source is made up of mainly north-west African donor groups, including Western Sahara, and to a lesser extent west Africans (YRI), consistent with the overall ancestry profiles.
>The ‘Portugal-Andalucia’ cluster shows the greatest YRI contribution, and also shows some evidence of a second admixture date, with a more recent event involving only sub-Saharan-African-like and European-like source groups. This indicates a recent pulse of sub-Saharan African DNA, independent of the north African component.
Keep in mind this is using the modern mutted NAFRI as reference. That's why they pick up even more if you use Morocco_LN, who was more European shifted than modern nafris and likely the ones that invaded Iberia at the time.
>>17758733
>There is an axis of significant genetic differentiation along the east–west direction, in contrast to remarkable genetic similarity in the north–south direction. North African admixture, associated with the Islamic conquest, can be dated to the period between c. AD 860–1120
>To distinguish between possible scenarios that could produce these patterns, we applied the GLOBETROTTER method to each of our six clusters (Methods). GLOBETROTTER infers dates of admixture and the make-up of the source populations, and tests whether admixture patterns are consistent with a simple mixing of two groups at a single time in the past, compared to more complex alternative models. GLOBETROTTER found strong evidence (p<0.01) of admixture for all six clusters.
>For all six clusters, an extremely similar event was inferred, in a tight time-range of 860–1120 CE, and with similar source groups, present in varying proportions (4–10% for the minor group). The major source was inferred to contain almost exclusively European donor groups, and the minor source is made up of mainly north-west African donor groups, including Western Sahara, and to a lesser extent west Africans (YRI), consistent with the overall ancestry profiles.
>The ‘Portugal-Andalucia’ cluster shows the greatest YRI contribution, and also shows some evidence of a second admixture date, with a more recent event involving only sub-Saharan-African-like and European-like source groups. This indicates a recent pulse of sub-Saharan African DNA, independent of the north African component.
Keep in mind this is using the modern mutted NAFRI as reference. That's why they pick up even more if you use Morocco_LN, who was more European shifted than modern nafris and likely the ones that invaded Iberia at the time.
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