Cited by 2,848Forensic and Genetic ResearchGenetic diversity and population structureRace, Genetics, and Society

Ancient Admixture in Human History

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Patterson, Nick, Moorjani, Priya, Luo, Yontao, Mallick, Swapan, Rohland, Nadin, Zhan, Yiping, Genschoreck, Teri, Webster, Teresa +1 more·2012·Genetics

Abstract

Population mixture is an important process in biology. We present a suite of methods for learning about population mixtures, implemented in a software package called ADMIXTOOLS, that support formal tests for whether mixture occurred and make it possible to infer proportions and dates of mixture. We also describe the development of a new single nucleotide polymorphism (SNP) array consisting of 629,433 sites with clearly documented ascertainment that was specifically designed for population genetic analyses and that we genotyped in 934 individuals from 53 diverse populations. To illustrate the methods, we give a number of examples that provide new insights about the history of human admixture. The most striking finding is a clear signal of admixture into northern Europe, with one ancestral population related to present-day Basques and Sardinians and the other related to present-day populations of northeast Asia and the Americas. This likely reflects a history of admixture between Neolithic migrants and the indigenous Mesolithic population of Europe, consistent with recent analyses of ancient bones from Sweden and the sequencing of the genome of the Tyrolean “Iceman.”

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Crossref · 10.1534/genetics.112.145037

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  • Sidon_BA shared more alleles with the Lebanese than with most other present-day Levantines.

    “We explored this further by computing the statistic f4(Lebanese, present-day Near Easterner; Sidon_BA, Chimpanzee) using qpDstat39 (with parameter f4mode: YES) and found that Sidon_BA shared more alleles with the Lebanese than with most other present-day Levantines (Figure S7), supporting local population continuity as observed in Sidon’s archaeological records.”
  • The dataset further merges with 2,583 present-day people genotyped on the Affymetrix Human Origins array, including 238 new individuals.

    “We then further merged with 2,583 present-day people genotyped on the Affymetrix Human Origins array13,16 (238 new) (Supplementary Data Table 2; Supplementary Information, section 2).”
  • Almost all ancient and present-day West Eurasians have evidence of significant admixture between two or more ancestral populations, as documented by negative f3(Test; Reference1, Reference2) statistics.

    “Almost all ancient and present-day West Eurasians have evidence of significant admixture between two or more ancestral populations, as documented by statistics of the form f3(Test; Reference1, Reference2) which if negative, show that a Test population's allele frequencies tend to be intermediate between two Reference populations16 (Extended Data Table 2).”
  • The study genotyped 238 present-day individuals from 17 diverse West Eurasian populations on the Affymetrix Human Origins array and applied quality control analyses as previously described.

    “We genotyped 238 present-day individuals from 17 diverse West Eurasian populations on the Affymetrix Human Origins array16, and applied quality control analyses as previously described13 (Supplementary Data Table 2).”
  • qpAdm and the f4-ratio test reveal that modern Egyptians inherit 8% more ancestry from African ancestors than the three ancient Egyptians do.

    “Both qpAdm35 and the f4-ratio test39 reveal that modern Egyptians inherit 8% more ancestry from African ancestors than the three ancient Egyptians do, which is also consistent with the ADMIXTURE results discussed above.”

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Research works printed but not linked: 3

  1. Czebreszuk, J., 2003 Bell beakers from west to east, pp. 476-485, Vol. 8000. Ancient Europe 8000 B.C. -A.D 1000: An encyclopedia of the barbarian world, Vol. 2, edited by P. I. Bogucki and P. J. Crabtree. Charles Scribner's Sons, New York.
  2. Mackerras, C., 1972 The Uighur Empire According to the Tang Dy- nastic Histories, Australian National University Press, Canberra.
  3. Waddell, P., and D. Penny, 1996 Evolutionary trees of apes and humans from DNA sequences pp. 53-74 in Handbook of Human Symbolic Evolution, edited by A. Lock and C. Peter. Wiley- Blackwell, New York.

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Authors
Patterson, N., Moorjani, P., Luo, Y., Mallick, S., Rohland, N., Zhan, Y., Genschoreck, T., Webster, T., & Reich, D.
Affiliations
  • Broad Institute (US)
  • Harvard University (US)
  • Affymetrix (United States) (US)
Corresponding author
Patterson, Nick
Venue
Genetics
Published
2012-11-01
Volume
192
Issue
3
Pages
1065-1093
ISSN
  • 0016-6731 (ISSN-L)
  • 1943-2631
OpenAlex
W2166214412
Cited by
2,848
References
68
Citations by year
2026: 263 · 2025: 378 · 2024: 349 · 2023: 289 · 2022: 283 · 2021: 330 · 2020: 223 · 2019: 172 · 2018: 169 · 2017: 127 · 2016: 92 · 2015: 82 · 2014: 57 · 2013: 24 · 2012: 5
FWCI
32.28
Type
journal article
Language
en
Open access
Locations
  • Genetics (publishedVersion, public-domain)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation (1032255)
  • National Institutes of Health
  • National Institute of General Medical Sciences (GM100233, R01GM100233)
Topics
  • 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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Race, Genetics, and Society
Keywords
human admixture, admixture proportions, SNP array, population structure, Neolithic migration, Basques, Sardinians, Iceman, ancient DNA, Northern Europe
MeSH terms
Algorithms, Ethnicity, Genetics, Population, Humans, Hybridization, Genetic, Models, Genetic, Software, Evolution, Molecular, Internet, Polymorphism, Single Nucleotide, Racial Groups, Gene Flow

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