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On the Complexity of uSPR Distance
July-September 2010 (vol. 7 no. 3)
pp. 572-576
We show that subtree prune and regraft (uSPR) distance on unrooted trees is fixed parameter tractable with respect to the distance. We also make progress on a conjecture of Steel [9] on the preservation of uSPR distance under chain reduction, improving on lower bounds of Hickey et al. [7].
[1] B.L. Allen and M. Steel, "Subtree Transfer Operations and Their Induced Metrics on Evolutionary Trees," Annals of Combinatorics, vol. 5, no. 1, pp. 1-15, 2001.
[2] M.L. Bonet, K.St. John, R. Mahindru, and N. Amenta, "Approximating Subtree Distances between Phylogenies," J. Computational Biology, vol. 13, no. 8, pp. 1419-1434, 2006.
[3] M. Bordewich, C. McCartin, and C. Semple, "A 3-Approximation Algorithm for the Subtree Distance between Phylogenies," J. Discrete Algorithms, vol. 6, no. 3, pp. 458-471, 2008.
[4] M. Bordewich and C. Semple, "On the Computational Complexity of the Rooted Subtree Prune and Regraft Distance," Annals of Combintorics, vol. 8, pp. 409-423, 2004.
[5] M. Hallett and C. McCartin, "A Faster FPT Algorithm for the Maximum Agreement Forest Problem," Theory of Computing Systems, vol. 41, no. 3, pp. 539-550, 2007.
[6] J. Hein, T. Jiang, L. Wang, and K. Zhang, "On the Complexity of Comparing Evolutionary Trees," Discrete Applied Math., vol. 71, nos. 1-3, pp. 153-169, 1996.
[7] G. Hickey, F. Dehne, A. Rau-Chaplin, and C. Blouin, "SPR Distance Computation for Unrooted Trees," Evolutionary Bioinformatics, vol. 4, pp. 17-27, 2008.
[8] C. McCartin, personal comm., 2008.
[9] M. Steel, "SPR Conjecture," www.math.canterbury.ac.nz/~m.steel/ research reward2.pdf, 2002.
[10] D.L. Swofford, G.J. Olsen, P.J. Waddell, and D.M. Hillis, "Phylogenetic Inference," Molecular Systematics, second ed., pp. 407-514, Sinauer, 1996.
Index Terms:
Phylogeny, analysis of algorithms, fixed parameter tractability.
Citation:
Maria Luisa Bonet, Katherine St. John, "On the Complexity of uSPR Distance," IEEE/ACM Transactions on Computational Biology and Bioinformatics, vol. 7, no. 3, pp. 572-576, July-Sept. 2010, doi:10.1109/TCBB.2008.132