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DNA studies if black amazigh im Morocco
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[QUOTE]Originally posted by Doug M: [QB] The point is they should sample populations in West Africa closer to the Sahara and Sahel who have known historic links via trade and travel with Northern Afrca. Why no samples from Senegal, Mali, Southern Mauritania,Chad, Niger and so forth? Obviously there has always been migration beck and forth between the Sahara and areas to the South. However, like I mentioned previously, without comprehensive DNA samples across all the populations within the Sahel and to the South you won't get an accurate picture. The populations in the Sahara are too small and scattered and have always been to rely on 'stand in' populations from far off places who have no known historic connection to said populations. Case in point, what is the relationship between Saharan Tuareg DNA and folks like the Hausa who are well known traders with the Tuareg (the indigo turbans worn by the Tuareg came from Kano)? Not to mention the historical boundaries of the Hausa and Kanem empires straddle the Sahara, Sahel and areas to the south into West Africa. http://www.reuters.com/article/us-nigeria-dyers-idUSL2668533920070426 In fact the Chad basin has historically been a key bridge between the Sahara, East Africa, West Africa and Central Africa. [IMG]https://upload.wikimedia.org/wikipedia/commons/8/8b/CentralEastAfrica1750.png[/IMG] https://en.wikipedia.org/wiki/File:CentralEastAfrica1750.png Chad basin map: [IMG]https://upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Chad_River_Basin_relief_2.png/1024px-Chad_River_Basin_relief_2.png[/IMG] Recall the infamous Henn paper from 2012 "Genomic Ancestry of North Africans Supports Back-to-Africa Migrations" where they skipped over the Chad area and Sahel region and focused on samples along the coast and then thousands of miles away in Nigeria. This is intentional. They don't want to sample these intermediate populations since the Chad basin is an ancient refuge for populations during the drying Sahara period and a nexus for populations moving into other parts of Africa. [IMG]https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Map_of_samples_and_population_structure_of_North_Africa_and_neighboring_populations.png/640px-Map_of_samples_and_population_structure_of_North_Africa_and_neighboring_populations.png[/IMG] https://commons.wikimedia.org/wiki/Category:Genetic_studies_on_Hausa Tuareg man: [IMG]https://s-media-cache-ak0.pinimg.com/736x/76/81/40/7681403db2e4d6f4c7466f30a8be12dd.jpg[/IMG] Hausa Durbar: [IMG]https://c1.staticflickr.com/3/2385/2063181441_52ba3b63a4_z.jpg?zz=1[/IMG] https://en.wikipedia.org/wiki/Alasho [/QB][/QUOTE]
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