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Activity Number: 259
Type: Invited
Date/Time: Tuesday, August 8, 2006 : 10:30 AM to 12:20 PM
Sponsor: IMS
Abstract - #305302
Title: Using Bootstrap Support for Splits To Construct Confidence Regions for Trees
Author(s): Edward Susko*+
Companies: Dahousie University
Address: Chase Building, Halifax, NS, B3H 3J5, Canada
Keywords: phylogenetics ; statistical inference ; bootstrap
Abstract:

Many estimated topologies in phylogenetic studies are presented with the bootstrap support for each split in the topology indicated. If phylogenetic estimation is unbiased, high bootstrap support for a split suggests there is a good deal of certainty that the split actually is present in the tree and low bootstrap support suggests one or more of the taxa on one side of the estimated split might be located with taxa on the other side. In the latter case, the follow-up questions about how many and which taxa reasonably could be placed incorrectly and where they might alternatively be placed are not addressed through the presented bootstrap support. We will present an algorithm that finds the set of all trees with minimum bootstrap support for their splits greater than some given value. The output is a ranked list of trees.


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