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Thread: Divergence between archaic and modern humans may date to 260,000 years ago.

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    2 members found this post helpful.

    Divergence between archaic and modern humans may date to 260,000 years ago.

    See:
    https://www.biorxiv.org/content/10.1101/145409v1

    Ancient genomes from southern Africa pushes modern human divergence beyond 260,000 years ago

    View ORCID ProfileCarina M. Schlebusch, View ORCID ProfileHelena Malmström, View ORCID ProfileTorsten Günther, Per Sjödin, Alexandra Coutinho, View ORCID ProfileHanna Edlund, Arielle R. Munters, Maryna Steyn, View ORCID ProfileHimla Soodyall, View ORCID ProfileMarlize Lombard, View ORCID ProfileMattias Jakobsson

    "
    Southern Africa is consistently placed as one of the potential regions for the evolution of Homo sapiens. To examine the region’s human prehistory prior to the arrival of migrants from East and West Africa or Eurasia in the last 1,700 years, we generated and analyzed genome sequence data from seven ancient individuals from KwaZulu-Natal, South Africa. Three Stone Age hunter-gatherers date to ~2,000 years ago, and we show that they were related to current-day southern San groups such as the Karretjie People. Four Iron Age farmers (300–500 years old) have genetic signatures similar to present day Bantu-speakers. The genome sequence (13x coverage) of a juvenile boy from Ballito Bay, who lived ~2,000 years ago, demonstrates that southern African Stone Age hunter-gatherers were not impacted by recent admixture; however, we estimate that all modern-day Khoekhoe and San groups have been influenced by 9–22% genetic admixture from East African/Eurasian pastoralist groups arriving >1,000 years ago, including the Ju|‘hoansi San, previously thought to have very low levels of admixture. Using traditional and new approaches, we estimate the population divergence time between the Ballito Bay boy and other groups to beyond 260,000 years ago. These estimates dramatically increases the deepest divergence amongst modern humans, coincide with the onset of the Middle Stone Age in sub-Saharan Africa, and coincide with anatomical developments of archaic humans into modern humans as represented in the local fossil record. Cumulatively, cross-disciplinary records increasingly point to southern Africa as a potential (not necessarily exclusive) ‘hot spot’ for the evolution of our species."


    Non si fa il proprio dovere perchè qualcuno ci dica grazie, lo si fa per principio, per se stessi, per la propria dignità. Oriana Fallaci

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    Basal S African contributed 86 % to KS
    but even older Basal human contributed 31 % to Bantu

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    1 members found this post helpful.

    Ancient West African HG in the context of African population history

    https://www.nature.com/articles/s41586-020-1929-1


    Our knowledge of ancient human population structure in sub-Saharan Africa, particularly prior to the advent of food production, remains limited. Here we report genome-wide DNA data from four children—two of whom were buried approximately 8,000 years ago and two 3,000 years ago—from Shum Laka (Cameroon), one of the earliest known archaeological sites within the probable homeland of the Bantu language group. One individual carried the deeply divergent Y chromosome haplogroup A00, which today is found almost exclusively in the same region12,13. However, the genome-wide ancestry profiles of all four individuals are most similar to those of present-day hunter-gatherers from western Central Africa, which implies that populations in western Cameroon today—as well as speakers of Bantu languages from across the continent—are not descended substantially from the population represented by these four people. We infer an Africa-wide phylogeny that features widespread admixture and three prominent radiations, including one that gave rise to at least four major lineages deep in the history of modern humans.

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    Hey, Jose, we already had a thread on this so I'm going to merge the threads.

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    Cool.

    Where is the lotus flower without the swamp rot?
    Last edited by jose luis; 27-01-20 at 20:17.

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    Some interesting thoughts from Chris Stringer on the findings in the paper.

    https://twitter.com/ChrisStringer65/...567298/photo/1

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