A Nomenklatura científica às cegas na elaboração da Árvore da Vida

Gene tree discordance, phylogenetic inference and the multispecies coalescent

Copyright 2009 Elsevier Ltd. All rights reserved.

Trends in Ecology & Evolution, Volume 24, Issue 6, 332-340, 23 March 2009

doi:10.1016/j.tree.2009.01.009

James H. Degnan1, 2, and Noah A. Rosenberg1, 3, 4,

1Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109, USA

2Current address: Department of Mathematics and Statistics, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand

3Center for Computational Medicine and Biology, University of Michigan, Ann Arbor, MI 48109, USA

4Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA


Available online 21 March 2009.
The field of phylogenetics is entering a new era in which trees of historical relationships between species are increasingly inferred from multilocus and genomic data. A major challenge for incorporating such large amounts of data into inference of species trees is that conflicting genealogical histories often exist in different genes throughout the genome. Recent advances in genealogical modeling suggest that resolving close species relationships is not quite as simple as applying more data to the problem. Here we discuss the complexities of genealogical discordance and review the issues that new methods for multilocus species tree inference will need to address to account successfully for naturally occurring genomic variability in evolutionary histories.

Article Outline

The problem of gene tree discordance
The multispecies coalescent
Conceptual basis for discordance
Gene tree probabilities
Species tree inference
Consensus and concatenation
New approaches
Taxon sampling for species trees
Conclusions
Acknowledgements
Glossary
Supplementary data
References