Accessibility navigation


Large punctuational contribution of speciation to evolutionary divergence at the molecular level

Pagel, M., Venditti, C. and Meade, A. (2006) Large punctuational contribution of speciation to evolutionary divergence at the molecular level. Science, 314 (5796). pp. 119-121. ISSN 0036-8075

Full text not archived in this repository.

To link to this article DOI: 10.1126/science.1129647

Abstract/Summary

A long-standing debate in evolutionary biology concerns whether species diverge gradually through time or by punctuational episodes at the time of speciation. We found that approximately 22% of substitutional changes at the DNA level can be attributed to punctuational evolution, and the remainder accumulates from background gradual divergence. Punctuational effects occur at more than twice the rate in plants and fungi than in animals, but the proportion of total divergence attributable to punctuational change does not vary among these groups. Punctuational changes cause departures from a clock-like tempo of evolution, suggesting that they should be accounted for in deriving dates from phylogenies. Punctuational episodes of evolution may play a larger role in promoting evolutionary divergence than has previously been appreciated.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Biological Sciences
ID Code:10207
Uncontrolled Keywords:RAPID EVOLUTION, SUBSTITUTIONS, EQUILIBRIUM, POPULATIONS, PHYLOGENIES, GRADUALISM, SEQUENCE, DYNAMICS, TEMPO, MODEL

Centaur Editors: Update this record

Page navigation