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Evolutionary divergence of AP-PCR (RAPD) patterns

L Espinasa1, R Borowsky

  • 1Department of Biology, New York University, New York 10003, USA.

Molecular Biology and Evolution
|April 29, 1998
PubMed
Summary
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Arbitrary Primer Amplified Polymorphic DNA (AP-PCR) divergence rates vary significantly across different animal groups, refuting their use as a universal molecular clock. However, AP-PCR patterns can still date evolutionary events within specific taxa.

Area of Science:

  • Molecular evolution
  • Population genetics
  • Phylogenetics

Background:

  • Arbitrary Primer Amplified Polymorphic DNA (AP-PCR) is a molecular technique used to assess genetic variation.
  • Understanding the rate of genetic divergence is crucial for dating evolutionary events and constructing phylogenetic trees.

Purpose of the Study:

  • To investigate the regularity of AP-PCR pattern divergence rates across different taxa.
  • To determine if AP-PCR divergence can serve as a universal molecular clock for evolutionary dating.

Main Methods:

  • Analysis of AP-PCR pattern divergence rates in primates, antelopes, and Hawaiian Drosophila grimshawi.
  • Comparison of divergence rates among the examined taxa.

Main Results:

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  • AP-PCR divergence rates varied significantly among primates, antelopes, and Hawaiian Drosophila.
  • The results indicate that AP-PCR does not exhibit clocklike regularity across all animal groups.
  • A strong correlation was observed between AP-PCR pattern divergence and time since divergence within each specific group.

Conclusions:

  • AP-PCR divergence rates are not constant across diverse animal taxa and cannot be used as a universal molecular clock.
  • AP-PCR can be a valuable tool for dating evolutionary divergence events when calibrated within a limited taxonomic group.