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Hasn't backmigration/Eurasian admixture post-introgression made that true? iirc reference bias artefactually made African genomes look like they had no Neandert
by mmmrtl 2y ago
Hasn't backmigration/Eurasian admixture post-introgression made that true? iirc reference bias artefactually made African genomes look like they had no Neanderthal segments.
https://www.cell.com/cell/fulltext/S0092-8674(20)30059-3 https://www.cell.com/cell/fulltext/S0092-8674(20)30059-3
https://www.pnas.org/doi/full/10.1073/pnas.1313787111 https://www.pnas.org/doi/full/10.1073/pnas.1313787111
- robwwilliams 2y agoLovely paper but their analysis did not include either KhoiSan or Central African hunter-gather Pygmy populations. They used the 1000 Genomes project.
- robwwilliams 2y agoI read a bit more. There definitely was introgression of West Eurasian populations into East Africa and Sudan than percolated into West Africans to the tune of about 15 million base-pairs of sequence tagged as Neanderthal. Not sure we have values for how much Yoruban ancestry is now embedded in Mbuti genomes, but it is small. So the flow of Neanderthal genomes into Central African hunter-gathers will sub-decimal dust. But having said all that, maybe the key point Zimmer is making IS a good generalization.
- mmmrtl 2y agoI think it is a fair generalization at this point. Mbuti also have a ~6% West Eurasian admixture signal using an ancient (4.5kya) Ethiopian individual as reference, though Pickrell 2014 did not see it. Decimal dust, perhaps? https://www.science.org/doi/10.1126/science.aad2879 https://www.science.org/doi/10.1126/science.aad2879 The ghost admixture story(s) will turn out to be much more localized, I imagine.