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AI Summary of Peer-Reviewed Research

This page presents an AI-generated summary of a published research paper. The original authors did not write or review this article. [See full disclosure ↓]

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Ancient DNA shows widespread selection across West Eurasia

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Research area:GeneticsEvolution and Genetic Dynamics

What the study found

The study found that, over the past ten millennia, many hundreds of alleles were affected by strong directional selection across West Eurasia. It also found one-standard-deviation changes, on the scale of modern variation, in combinations of alleles that today predict complex traits.

Why the authors say this matters

The authors say these findings matter because they show how Darwinian forces couple to allelic effects and shape the genetic architecture of complex traits. The study suggests this may help explain patterns in traits such as predicted body fat, schizophrenia, and cognitive performance, although the authors note the past relevance of these measures is unclear.

What the researchers tested

The researchers used ancient DNA and estimated selection coefficients at 9.7 million variants. This let them study how selection acted across West Eurasia and how it related to combinations of alleles associated with complex traits.

What worked and what didn't

The analysis found strong directional selection affecting many hundreds of alleles in the past ten millennia. It also found decreases in predicted body fat and schizophrenia, and increases in measures of cognitive performance.

What to keep in mind

The changes in predicted traits were measured in industrialized societies, and the abstract says it remains unclear how these relate to phenotypes that were adaptive in the past. No other limitations are described in the available summary.

Key points

  • Many hundreds of alleles were affected by strong directional selection over the past ten millennia.
  • The study found one-standard-deviation changes in combinations of alleles that predict complex traits today.
  • Predicted body fat and schizophrenia decreased, while measures of cognitive performance increased.
  • Selection coefficients were estimated at 9.7 million variants using ancient DNA.
  • The abstract says it is unclear how the modern trait measures relate to phenotypes that were adaptive in the past.

Disclosure

Research title:
Ancient DNA shows widespread selection across West Eurasia
Publication date:
2026-04-15
DOI:
10.1038/s41586-026-10358-1
OpenAlex record:
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AI provenance: AI provenance information is not available for this post.

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