Cited by 156Pleistocene-Era Hominins and ArchaeologyForensic and Genetic ResearchGenetic diversity and population structure

Complex History of Admixture between Modern Humans and Neandertals

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Vernot, Benjamin, Akey, Joshua M.·2015·The American Journal of Human Genetics

Abstract

Recent analyses have found that a substantial amount of the Neandertal genome persists in the genomes of contemporary non-African individuals. East Asians have, on average, higher levels of Neandertal ancestry than do Europeans, which might be due to differences in the efficiency of purifying selection, an additional pulse of introgression into East Asians, or other unexplored scenarios. To better define the scope of plausible models of archaic admixture between Neandertals and anatomically modern humans, we analyzed patterns of introgressed sequence in whole-genome data of 379 Europeans and 286 East Asians. We found that inferences of demographic history restricted to neutrally evolving genomic regions allowed a simple one-pulse model to be robustly rejected, suggesting that differences in selection cannot explain the differences in Neandertal ancestry. We show that two additional demographic models, involving either a second pulse of Neandertal gene flow into the ancestors of East Asians or a dilution of Neandertal lineages in Europeans by admixture with an unknown ancestral population, are consistent with the data. Thus, the history of admixture between modern humans and Neandertals is most likely more complex than previously thought.

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Crossref · 10.1016/j.ajhg.2015.01.006

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  • Farmers could have acted as a population that diluted Neanderthal ancestry in western Eurasia.

    “Thus, FAs could have acted as a population that diluted NE ancestry in western Eurasia (text S4), as previously suggested (16, 17).”
  • In Europeans, archaic ancestry is consistent with contributions by a single population of Neanderthals through one or more pulses.

    “In Europeans, archaic ancestry is consistent with contributions by a single population of Neanderthals 3 through one or more pulses [4][5][6][7] .”
  • Early farmers are partly genetically derived from the previously identified basal Eurasian lineage.

    “It has been proposed that the early FAs are partly genetically derived from the previously identified “basal Eurasian” lineage (16, 17, 51).”
  • The basal Eurasian lineage diverged from other Eurasian hunter-gatherer populations before the latter mixed with Neanderthals, and therefore had a lower Neanderthal ancestry.

    “This lineage is thought to have diverged from other Eurasian HG populations before the latter mixed with the NE, and therefore had a lower NE ancestry (16, 17, 51).”

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Authors
Vernot, B., & Akey, J. M.
Affiliations
University of Washington (US)
Corresponding author
  • Vernot, Benjamin
  • Akey, Joshua M.
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2015-03
Volume
96
Issue
3
Pages
448-453
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2056921607
Cited by
149
References
19
Citations by year
2026: 5 · 2025: 4 · 2024: 11 · 2023: 10 · 2022: 8 · 2021: 30 · 2020: 9 · 2019: 6 · 2018: 19 · 2017: 15 · 2016: 26 · 2015: 6
FWCI
92.10
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (R01GM110068)
Topics
  • Social Sciences › Anthropology › Pleistocene-Era Hominins and Archaeology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
Keywords
purifying selection, demographic history, gene flow
MeSH terms
Animals, Genetics, Population, Humans, Models, Genetic, Genome, White People, Asian People, Gene Flow, Neanderthals

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