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Related Concept Videos

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Updated: Dec 15, 2025

Manipulation of Gene Function in Mexican Cavefish
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Native American gene flow into Polynesia predating Easter Island settlement.

Alexander G Ioannidis1,2, Javier Blanco-Portillo3, Karla Sandoval3

  • 1Institute for Computational and Mathematical Engineering, Stanford University, Stanford, CA, USA. ioannidis@stanford.edu.

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|July 10, 2020
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Summary
This summary is machine-generated.

Genetic analysis reveals prehistoric voyaging contact between Polynesian and Native American populations around AD 1200. This evidence supports ancient trans-Pacific interactions, challenging previous debates on the origins of New World crops in Polynesia.

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Area of Science:

  • Population Genetics
  • Archaeogenetics
  • Human Migration

Background:

  • The potential for prehistoric voyaging contact between Polynesian and Native American populations remains a topic of scientific debate.
  • Evidence such as the presence of New World crops (e.g., sweet potato, bottle gourd) in Polynesia has fueled theories of trans-Pacific contact.
  • Previous genetic studies have yielded conflicting results, leaving the question unresolved.

Observation:

  • This study analyzed genome-wide variation in 807 individuals from 17 Polynesian island populations and 15 Pacific coast Native American groups.
  • The research sought definitive genetic markers indicating admixture between these populations.

Findings:

  • Conclusive evidence of prehistoric contact between Polynesian and Native American individuals around AD 1200 was identified.
  • This contact occurred contemporaneously with the settlement of remote Oceania.
  • Genetic analyses strongly suggest a single contact event in eastern Polynesia, prior to the settlement of Rapa Nui (Easter Island).
  • The Native American group involved is most closely related to indigenous populations of present-day Colombia.

Implications:

  • This finding provides strong genetic support for pre-Columbian trans-Pacific voyaging and interaction.
  • It offers a potential explanation for the presence of certain American crops in the Polynesian archaeological record.
  • The study resolves a long-standing debate in the fields of archaeology, anthropology, and genetics.