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Related Experiment Video

Updated: Jul 28, 2025

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
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Pervasive incomplete lineage sorting illuminates speciation and selection in primates.

Iker Rivas-González1, Marjolaine Rousselle1, Fang Li2,3,4

  • 1Bioinformatics Research Centre, Aarhus University, DK-8000 Aarhus C, Denmark.

Science (New York, N.Y.)
|June 1, 2023
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Summary
This summary is machine-generated.

Incomplete lineage sorting (ILS) affects up to 64% of the primate genome, impacting phylogenetic reconstruction. This study uses ILS to reveal recent speciation times and selection patterns across primate evolution.

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Area of Science:

  • Evolutionary Biology
  • Genomics
  • Primate Phylogenetics

Background:

  • Incomplete lineage sorting (ILS) creates discrepancies between genomic and species phylogenies.
  • Understanding ILS is crucial for accurate evolutionary reconstructions.

Purpose of the Study:

  • Investigate ILS frequencies and drivers in 29 primate ancestral nodes.
  • Utilize ILS to estimate speciation times and ancestral population sizes.
  • Analyze genomic variation and selection impacts on ILS.

Main Methods:

  • Phylogenetic analysis across the primate phylogeny.
  • Genomic data analysis to quantify ILS.
  • Comparison of ILS patterns between autosomes and the X chromosome.
  • Analysis of ILS in relation to gene function (immune vs. housekeeping).

Main Results:

  • Up to 64% of the genome showed ILS at individual nodes.
  • Estimated speciation times align with fossil records.
  • ILS variation is influenced by recombination and gene proximity, indicating selection.
  • Reduced ILS on the X chromosome suggests stronger selection.
  • Excess ILS in immune genes and deficit in housekeeping genes observed.

Conclusions:

  • Extensive ILS in primates provides insights into speciation and population history.
  • Genomic features and selection significantly shape ILS patterns.
  • ILS is a valuable tool for understanding primate evolutionary dynamics.