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A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
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The Reliability and Stability of an Inferred Phylogenetic Tree from Empirical Data.
Yukako Katsura1,2, Craig E Stanley1, Sudhir Kumar1
1Department of Biology and Institute for Genomics and Evolutionary Medicine, Temple University, Philadelphia, PA.
Molecular Biology and Evolution
|January 20, 2017
Summary
This study introduces subtree stability (Ps) as a new measure for phylogenetic tree reliability, complementing bootstrap probability (Pb). High values for both Pb and Ps indicate a dependable phylogenetic tree.
Area of Science:
- Phylogenetics
- Computational Biology
- Evolutionary Biology
Background:
- Phylogenetic tree reliability is crucial for understanding evolutionary relationships.
- Bootstrap probability (Pb) is a common metric, but low values raise uncertainty.
- A need exists for robust methods to assess phylogenetic inference accuracy.
Purpose of the Study:
- To introduce a novel metric, subtree stability (Ps), for evaluating phylogenetic tree reliability.
- To demonstrate the complementary nature of subtree stability and bootstrap probability.
- To present a computational tool for calculating these reliability measures.
Main Methods:
- Proposed subtree stability (Ps) as the probability of obtaining a specific subtree.
- Showed that high Pb and Ps values are necessary for a reliable phylogenetic tree.
- Demonstrated that Ps can be calculated using bootstrap probability with the closest outgroup.
Main Results:
- Subtree stability (Ps) provides an additional layer of confidence in phylogenetic trees.
- Both bootstrap probability (Pb) and subtree stability (Ps) must be high for reliable inference.
- The RESTA program was developed to compute both Pb and Ps values.
Conclusions:
- Subtree stability (Ps) offers a valuable, complementary measure to bootstrap probability (Pb) for assessing phylogenetic tree reliability.
- The integration of Pb and Ps provides a more rigorous evaluation of inferred evolutionary relationships.
- The RESTA program facilitates the practical application of these reliability metrics in phylogenetic analyses.
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