Journal
TRENDS IN ECOLOGY & EVOLUTION
Volume 21, Issue 11, Pages 614-620Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tree.2006.08.004
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Although comparisons of gene sequences have revolutionised our understanding of the animal phylogenetic tree, it has become clear that, to avoid errors in tree reconstruction, a large number of genes from many species must be considered: too few genes and stochastic errors predominate, too few taxa and systematic errors appear. We argue here that, to gather many sequences from many taxa, the best use of resources is to sequence a small number of expressed sequence tags (1000-5000 per species) from as many taxa as possible. This approach counters both sources of error, gives the best hope of a well-resolved phylogeny of the animals and will act as a central resource for a carefully targeted genome sequencing programme.
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