ASTRAL-II: coalescent-based species tree estimation with many hundreds of taxa and thousands of genes

By Siavash Mirarab, Tandy J. Warnow. Bioinform., 2015

894 citations recorded by the source corpus.

Motivation: The estimation of species phylogenies requires multiple loci, since different loci can have different trees due to incomplete lineage sorting, modeled by the multi-species coalescent model. We recently developed a coalescent-based method, ASTRAL, which is statistically consistent under the multi-species coalescent model and which is more accurate than other coalescent-based methods on the datasets we examined. ASTRAL runs in polynomial time, by constraining the search space using a set of allowed ‘bipartitions’. Despite the limitation to allowed bipartitions, ASTRAL is statistically consistent. Results: We present a new version of ASTRAL, which we call ASTRAL-II. We show that ASTRAL-II has substantial advantages over ASTRAL: it is faster, can analyze much larger datasets (up to 1000 species and 1000 genes) and has substantially better accuracy under some conditions. ASTRAL’s running time is O(n2k|X|2), and ASTRAL-II’s running time is O(nk|X|2), where n is the number of species, k is the number of loci and X is the set of allowed bipartitions for the search space. Availability and implementation: ASTRAL-II is available in open source at https://github.com/smirarab/ASTRAL and datasets used are available at http://www.cs.utexas.edu/~phylo/datasets/astral2/. Contact: smirarab@gmail.com Supplementary information: Supplementary data are available at Bioinformatics online.

Subfields: Genetics, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/c3513eccec0461e68a3a33fb660826178e0477a7

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In Genetics

  1. Erfan Sayyari
  2. Remco R. Bouckaert
  3. Siavash Mirarab
  4. Steven Kelly
  5. David M. Emms
  6. Xing‐Xing Shen
  7. Alexei J. Drummond
  8. Maryam Rabiee

In Molecular Biology

  1. Erfan Sayyari
  2. Remco R. Bouckaert
  3. Steven Kelly
  4. David M. Emms
  5. Siavash Mirarab
  6. Xing‐Xing Shen
  7. Alexei J. Drummond
  8. Maryam Rabiee

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