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Prospects for Building the Tree of Life from Large Sequence Databases
Amy C. Driskell,1,2*Cécile Ané,1J. Gordon Burleigh,1Michelle M. McMahon,1Brian C. O'Meara,2Michael J. Sanderson1
We assess the phylogenetic potential of 300,000 protein sequencessampled from Swiss-Prot and GenBank. Although only a small subsetof these data was potentially phylogenetically informative,this subset retained a substantial fraction of the originaltaxonomic diversity. Sampling biases in the databases necessitatebuilding phylogenetic data sets that have large numbers of missingentries. However, an analysis of two "supermatrices" suggeststhat even data sets with as much as 92% missing data can provideinsights into broad sections of the tree of life.
1 Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, CA 95616, USA. 2 Center for Population Biology, University of California, One Shields Avenue, Davis, CA 95616, USA.
These authors contributed equally to this work.
Present address: Department of Statistics, University of Wisconsin,Medical Science Center, 1300 University Avenue, Madison, WI53706, USA.
* To whom correspondence should be addressed. E-mail: acdriskell{at}ucdavis.edu
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