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View Full Version : Substantial Paleolithic European admixture in West Africans: is it possible?



Milkyway
12-02-2019, 05:33 PM
It seems that the % of Neanderthal ancestry has decreased from 3-6% to 2% in Eurasia (source (https://www.nature.com/articles/nature17993)), and this is somewhat surprising, even considering that a big proportion of the introgressed Neanderthal DNA segments in humans are slightly deleterious.

A study (https://www.pnas.org/content/116/5/1639) explored this issue in depth and found an alternative (and perhaps more plausible) explanation: instead of this dramatic decrease in Neanderthal ancestry what really happens is that present-day West Africans carry moderate amounts (10%?) of European-related ancestry.

In conclusion: Neanderthal ancestry has not decreased in West Eurasia over the last 45,000 years; instead, it has gradually increased in Sub-Saharan Africa over the last 20,000 years due to gene flow from W. Eurasia.

I am not aware if there are studies that support substantial European-related ancestry in West Africans. Is there any data that suggests this migration from W. Eurasia into Africa actually took place?

sum1
12-02-2019, 07:25 PM
West Africans have 12% Iberomaurasian DNA, that's where their neanderthal DNA comes from.

Milkyway
12-03-2019, 12:46 AM
West Africans have 12% Iberomaurasian DNA, that's where their neanderthal DNA comes from.

I guess that this means Iberomaurisians are directly related to West Eurasians and migrated at some point from Eurasia into Africa (it makes sense considering that mtDNA haplogroups like U6 (https://www.nature.com/articles/srep25501) suggests that a back-to-Africa migration occurred at some point).

sum1
12-03-2019, 10:07 AM
I guess that this means Iberomaurisians are directly related to West Eurasians and migrated at some point from Eurasia into Africa (it makes sense considering that mtDNA haplogroups like U6 (https://www.nature.com/articles/srep25501) suggests that a back-to-Africa migration occurred at some point).

35115

https://www.biorxiv.org/content/biorxiv/early/2018/09/20/423079.full.pdf

Iberomaurisians are a mixture of Dzudzuana and an unknown African population named Ancestral North Africans. At some point, they mixed with the ancestors of Niger-Congo peoples.

Nebro
12-04-2019, 12:36 AM
Yes possible through northern african migrations.