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Can We Future-Proof Consensus Trees?

delete2017-02-07
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David Bryant
A
Andrew Francis
M
Mike Steel *
DOI:10.1093/sysbio/syx030delete
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摘要

摘要

En 中文
Consensus methods are widely used for combining phylogenetic trees into a single estimate of the evolutionary tree for a group of species. As more taxa are added, the new source trees may begin to tell a different evolutionary story when restricted to the original set of taxa. However, if the new trees, restricted to the original set of taxa, were to agree exactly with the earlier trees, then we might hope that their consensus would either agree with or resolve the original consensus tree. In this article, we ask under what conditions consensus methods exist that are future proof in this sense. While we show that some methods (e.g., Adams consensus) have this property for specific types of input, we also establish a rather surprising no-go theorem: there is no reasonable consensus method that satisfies the future-proofing property in general. We then investigate a second notion of future proofing for consensus methods, in which trees (rather than taxa) are added, and establish some positive and negative results. We end with some questions for future work.
Keyword:
Adams consensus
consensus
extension stability
phylogeny
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