A Lookahead Branch-and-Bound Algorithm for the Maximum Quartet Consistency Problem

  • Gang Wu
  • Jia-Huai You
  • Guohui Lin
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3692)


A lookahead branch-and-bound algorithm (LBnB) is proposed for solving the Maximum Quartet Consistency (MQC) Problem where the input is a complete set of quartets on the taxa and the goal is to construct a phylogeny that satisfies the maximum number of given quartets. It integrates a number of previous efforts on exact algorithms, heuristics, and approximation algorithms for the NP-hard MQC problem, and a few improved search techniques, especially a lookahead scheme, to solve the problem optimally. The theoretical running time analysis of the LBnB algorithm is provided, and an extensive simulation study has been well designed to compare the algorithm to previous existing exact algorithms and a best heuristic Hypercleaning. The experimental results on both synthetic and real datasets show that LBnB outperformed other exact algorithms, and it was competitive to Hypercleaning on many datasets.


Dynamic Programming Search Tree Real Dataset Exact Algorithm Constraint Programming 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Gang Wu
    • 1
  • Jia-Huai You
    • 1
  • Guohui Lin
    • 1
  1. 1.Department of Computing ScienceUniversity of AlbertaEdmonton, AlbertaCanada

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