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Human evolution: Tracing ancient journeys through Denisovan DNA.

Shigeki Nakagome1

  • 1School of Medicine, Trinity College Dublin, Dublin 2, Ireland; Institute for the Study of Ancient Civilizations and Cultural Resources, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan.

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Summary
This summary is machine-generated.

Ancient Denisovan ancestry varies across East Asia due to complex population history. A new study reveals that the ancient Jomon hunter-gatherer population in Japan has minimal Denisovan genetic contribution.

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Area of Science:

  • Paleogenomics
  • Human Evolution
  • Population Genetics

Background:

  • Denisovan ancestry varies significantly across East Asian populations, indicating complex demographic events and multiple introgression episodes.
  • Understanding the distribution of archaic hominin ancestry is crucial for reconstructing human migration patterns and admixture history in Asia.

Purpose of the Study:

  • To investigate the extent of Denisovan ancestry within the Jomon population of the Japanese archipelago.
  • To clarify the role of Denisovan admixture in the genetic landscape of early East Asian hunter-gatherers.

Main Methods:

  • Genome-wide analysis of ancient and modern DNA samples.
  • Comparative population genomics to quantify archaic hominin introgression.
  • Phylogenetic analyses to infer ancestral relationships.

Main Results:

  • The Jomon population exhibits very low or undetectable levels of Denisovan ancestry.
  • This finding contrasts with higher Denisovan admixture observed in other East Asian populations.
  • The genetic profile of the Jomon suggests limited or no admixture with Denisovans during their early history.

Conclusions:

  • The Jomon population's genetic makeup is largely distinct from Denisovan admixture patterns seen elsewhere in East Asia.
  • This suggests unique demographic histories and potential isolation for the Jomon people.
  • Further research is needed to fully understand the peopling of the Japanese archipelago and its interactions with archaic hominins.