Complexity Insights of the Minimum Duplication Problem. Blin, G., Bonizzoni, P., Dondi, R., Rizzi, R., & Sikora, F. In Proc. of Current Trends in Theory and Practice of Computer Science (SOFSEM 2012), volume 7147, of Lect Notes Comput Sci, pages 153–164, 2012. Springer, Berlin.
Complexity Insights of the Minimum Duplication Problem [link]Paper  doi  abstract   bibtex   
The Minimum Duplication problem is a well-known problem in phylogenetics and comparative genomics. Given a set of gene trees, the Minimum Duplication problem asks for a species tree that induces the minimum number of gene duplications in the input gene trees. More recently, a variant of the Minimum Duplication problem, called Minimum Duplication Bipartite, has been introduced in [14], where the goal is to find all pre-duplications, that is duplications that precede, in the evolution, the first speciation with respect to a species tree. In this paper, we investigate the complexity of both Minimum Duplication and Minimum Duplication Bipartite problems. First of all, we prove that the Minimum Duplication problem is APX-hard, even when the input consists of five uniquely leaf-labelled gene trees (progressing on the complexity of the problem). Then, we show that the Minimum Duplication Bipartite problem can be solved efficiently by a randomized algorithm when the input gene trees have bounded depth.
@InProceedings{blin12complexity,
  author    = {Blin, Guillaume and Bonizzoni, Paola and Dondi, Riccardo and Rizzi, Romeo and Sikora, Florian},
  title     = {Complexity Insights of the Minimum Duplication Problem},
  booktitle = {Proc. of Current Trends in Theory and Practice of Computer Science (SOFSEM 2012)},
  year      = {2012},
  volume    = {7147},
  series    = lncs,
  pages     = {153--164},
  publisher = Springer,
  abstract  = {The Minimum Duplication problem is a well-known problem in phylogenetics and comparative genomics. Given a set of gene trees, the Minimum Duplication problem asks for a species tree that induces the minimum number of gene duplications in the input gene trees. More recently, a variant of the Minimum Duplication problem, called Minimum Duplication Bipartite, has been introduced in [14], where the goal is to find all pre-duplications, that is duplications that precede, in the evolution, the first speciation with respect to a species tree. In this paper, we investigate the complexity of both Minimum Duplication and Minimum Duplication Bipartite problems. First of all, we prove that the Minimum Duplication problem is APX-hard, even when the input consists of five uniquely leaf-labelled gene trees (progressing on the complexity of the problem). Then, we show that the Minimum Duplication Bipartite problem can be solved efficiently by a randomized algorithm when the input gene trees have bounded depth.},
  doi       = {10.1007/978-3-642-27660-6_13},
  keywords  = {jena; fpt; PABI},
  opteditor = {M{\'a}ria Bielikov{\'a} and Gerhard Friedrich and Georg Gottlob and Stefan Katzenbeisser and Gy{\"o}rgy Tur{\'a}n},
  owner     = {florian},
  timestamp = {2011.10.11},
  url       = {http://hal-univ-mlv.archives-ouvertes.fr/hal-00629047/en/},
}

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