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Related Experiment Videos

LumberJack: a heuristic tool for sequence alignment exploration and phylogenetic inference.

Carolyn J Lawrence1, Christian M Zmasek, R Kelly Dawe

  • 1Department of Plant Biology, The University of Georgia, Athens 30602, USA.

Bioinformatics (Oxford, England)
|March 27, 2004
PubMed
Summary

LumberJack is a novel phylogenetic tool that rapidly identifies likely tree topologies and maps phylogenetic signal. It uses jackknifed alignments and statistical tests to reveal significant evolutionary relationships.

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Area of Science:

  • Computational Biology
  • Phylogenetics
  • Bioinformatics

Background:

  • Phylogenetic analysis is crucial for understanding evolutionary relationships.
  • Efficiently exploring treespace and identifying phylogenetic signal are key challenges.

Purpose of the Study:

  • To introduce LumberJack, a phylogenetic tool designed for rapid exploration of treespace.
  • To enable the mapping of phylogenetic signal onto specific regions of an alignment.

Main Methods:

  • LumberJack generates non-random jackknifed alignments by sliding an omission window.
  • Neighbor-joining trees are constructed from full and jackknifed alignments.
  • Likelihoods of topologies are calculated and tested using Kishino-Hasegawa, Shimodaira-Hasegawa, and ELW tests.

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Main Results:

  • The tool facilitates quick sampling of treespace to find probable tree topologies.
  • It effectively maps phylogenetic signal onto alignment regions, providing clear insights.

Conclusions:

  • LumberJack serves as a valuable tool for accelerating phylogenetic analyses.
  • It aids in identifying significant evolutionary signals and likely tree structures.