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MBE Advance Access published online on June 23, 2006
Molecular Biology and Evolution, doi:10.1093/molbev/msl045
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© The Author 2006. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org
Accepted June 13, 2006

Research Article

Reconstructing the Evolutionary History of Polyploids From Multi-labelled Trees

Katharina T. Huber 1 *, Bengt Oxelman 2, Martin Lott 1, and Vincent Moulton 1

1 School of Computing Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
2 Department of Systematic Botany, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, SE-752 36 Uppsala, Sweden

* To whom correspondence should be addressed.
Katharina T. Huber, E-mail: katharina.huber{at}cmp.uea.ac.uk


  Abstract

In recent studies, phylogenetic networks have been derived from so-called multi-labelled trees in order to understand the origins of certain polyploids. Although the trees used in these studies were constructed using sophisticated techniques in phylogenetic analysis, the presented networks were inferred using ad hoc arguments, that cannot be easily extended to larger, more complicated examples. In this paper, we present a general method for constructing such networks that takes as input a multi-labelled phylogenetic tree, and outputs a phylogenetic network with certain desirable properties. To illustrate the applicability of our method, we discuss its use in reconstructing the evolutionary history of plant allopolyploids. We conclude with a discussion concerning possible future directions. The network construction method has been implemented and is freely available for use from http://www.uea.ac.uk/~a043878/padre.html.

Keywords: polyploid; phylogenetic tree; multi-labelled trees; phylogenetic network.
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