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Identifying Cliques of Convergent Characters: Concerted Evolution in the Cormorants and Shags
Citation
Holland, BR and Spencer, HG and Worthy, TH and Kennedy, M, Identifying Cliques of Convergent Characters: Concerted Evolution in the Cormorants and Shags, Systematic Biology, 59, (4) pp. 433-445. ISSN 1063-5157 (2010) [Refereed Article]
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Copyright Statement
The definitive publisher-authenticated version is available online at: www.oxfordjournals.org
Official URL: http://www.oxfordjournals.org/
DOI: doi:10.1093/sysbio/syq023
Abstract
A phylogenetic tree comprising clades with high bootstrap values or other strong measures of statistical support
is usually interpreted as providing a good estimate of the true phylogeny. Convergent evolution acting on groups of
characters in concert, however, can lead to highly supported but erroneous phylogenies. Identifying such groups of phylogenetically
misleading characters is obviously desirable. Here we present a procedure that uses an independent data source
to identify sets of characters that have undergone concerted convergent evolution. We examine the problematic case of the
cormorants and shags, for which trees constructed using osteological and molecular characters both have strong statistical
support and yet are fundamentally incongruent. We find that the osteological characters can be separated into those that
fit the phylogenetic history implied by the molecular data set and those that do not. Moreover, these latter nonfitting osteological
characters are internally consistent and form groups of mutually compatible characters or "cliques," which are
significantly larger than cliques of shuffled characters.We suggest, therefore, that these cliques of characters are the result of
similar selective pressures and are a signature of concerted convergence.
Item Details
Item Type: | Refereed Article |
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Keywords: | Character compatibility: concerted convergence: cormorants: homoplasy: incongruence: phylogeny: shags |
Research Division: | Mathematical Sciences |
Research Group: | Applied mathematics |
Research Field: | Biological mathematics |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the mathematical sciences |
UTAS Author: | Holland, BR (Professor Barbara Holland) |
ID Code: | 65165 |
Year Published: | 2010 |
Web of Science® Times Cited: | 38 |
Deposited By: | Mathematics |
Deposited On: | 2010-10-07 |
Last Modified: | 2011-01-18 |
Downloads: | 2 View Download Statistics |
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