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Neanderthal-Denisovan ancestors interbred with a distantly-related hominin

View ORCID ProfileAlan R. Rogers, Nathan S. Harris, View ORCID ProfileAlan A. Achenbach
doi: https://doi.org/10.1101/657247
Alan R. Rogers
Dept. of Anthropology, University of Utah, Salt Lake City, USA
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  • For correspondence: rogers@anthro.utah.edu
Nathan S. Harris
Dept. of Anthropology, University of Utah, Salt Lake City, USA
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Alan A. Achenbach
Dept. of Anthropology, University of Utah, Salt Lake City, USA
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Abstract

Previous research has shown that modern Eurasians interbred with their Neanderthal and Denisovan predecessors. We show here that hundreds of thousands of years earlier, the ancestors of Neanderthals and Denisovans interbred with their own Eurasian predecessors—members of a “superarchaic” population that separated from other humans about 2 mya. The superarchaic population was large, with an effective size between 10 and 46 thousand individuals. We confirm previous findings that: (1) Denisovans also interbred with superarchaics, (2) Neanderthals and Denisovans separated early in the middle Pleistocene, (3) their ancestors endured a bottleneck of population size, and (4) the Neanderthal population was large at first but then declined in size. We provide qualified support for the view that (5) Neanderthals interbred with the ancestors of modern humans.

Author summary We show that early in the middle Pleistocene, long before the expansion of modern humans into Eurasia, the “neandersovan” ancestors of Neanderthals and Denisovans undertook a very similar expansion. In both cases, an African population expanded into Eurasia, endured a narrow bottleneck of population size, interbred with indigeneous Eurasians, largely replaced them, and split into eastern and western sub-populations. In the earlier expansion, neandersovans interbred with a “superarchaic” population that had been separate since about 2 mya and may represent the original expansion of humans into Eurasia.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-ND 4.0 International license.
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Posted June 02, 2019.
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Neanderthal-Denisovan ancestors interbred with a distantly-related hominin
Alan R. Rogers, Nathan S. Harris, Alan A. Achenbach
bioRxiv 657247; doi: https://doi.org/10.1101/657247
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Neanderthal-Denisovan ancestors interbred with a distantly-related hominin
Alan R. Rogers, Nathan S. Harris, Alan A. Achenbach
bioRxiv 657247; doi: https://doi.org/10.1101/657247

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