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The variety of human virus evolution

W M Fitch1

  • 1Department of Ecology and Evolutionary Biology, University of California, Irvine 92717, USA.

Molecular Phylogenetics and Evolution
|February 1, 1996
PubMed
Summary

Viruses demonstrate rapid evolution, including positive Darwinian selection and host-dependent rates. Their evolutionary history reveals accurate ancestor dating and geographic correlations, showcasing diverse evolutionary mechanisms.

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Area of Science:

  • Virology
  • Evolutionary Biology
  • Molecular Evolution

Background:

  • Evolutionary theories often lack robust empirical examples.
  • Viruses provide a rich model system for studying evolutionary processes.

Purpose of the Study:

  • To review evidence supporting various evolutionary mechanisms in viruses.
  • To highlight the utility of viruses in demonstrating complex evolutionary dynamics.

Main Methods:

  • Review of existing research on viral evolution.
  • Analysis of case studies illustrating specific evolutionary phenomena.

Main Results:

  • Viruses exhibit rapid evolution and positive Darwinian selection with identified pressures.
  • Viral evolution rates vary significantly with host.
  • Accurate dating of the most recent common ancestor (cenancestor) is possible.
  • Evolutionary trees correlate with geographic isolation.
  • Evidence for punctuated molecular evolution and network evolution observed.

Conclusions:

  • Viruses serve as excellent models for understanding diverse evolutionary mechanisms.
  • Viral evolution showcases rapid adaptation, host-specific dynamics, and complex historical patterns.

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