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

Andrew Meade, Chris Venditti, Mark Pagel

Research output: Contribution to journalArticlepeer-review

171 Citations (SciVal)

Abstract

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.
Original languageEnglish
Pages (from-to)119-121
Number of pages3
JournalScience
Volume314
DOIs
Publication statusPublished - 06 Oct 2006

Fingerprint

Dive into the research topics of 'Large punctuational contribution of speciation to evolutionary divergence at the molecular level'. Together they form a unique fingerprint.

Cite this