Abstract
Recently, the shared center (SC) problem has been proposed as a mathematical model for inferring the allele-sharing status of a given set of individuals using a database of confirmed haplotypes as reference. The problem was proved to be NP-complete and a ratio-2 polynomial-time approximation algorithm was designed for its minimization version (called the closest shared center (CSC) problem). In this paper, we consider the parameterized complexity of the SC problem. First, we show that the SC problem is W[1]-hard with parameters d and n, where d and n are the radius and the number of (diseased or normal) individuals in the input, respectively. Then, we present two asymptotically optimal parameterized algorithms for the problem and apply them to linkage analysis.
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References
Cai, Z., Sabaa, H., Wang, Y., Goebel, R., Wang, Z., Xu, J., Stothard, P., Lin, G.: Most parsimonious haplotype allele sharing determination. BMC Bioinform. 10, 115 (2009)
Chen, Z.-Z., Wang, L.: Fast exact algorithms for the closest string and substring problems with application to the planted (L,d)-motif model. IEEE/ACM Trans. Comput. Biol. Bioinform. 8(5), 1400–1410 (2011)
Chen, Z.-Z., Ma, B., Wang, L.: A three-string approach to the closest string problem. J. Comput. Syst. Sci. 78, 164–178 (2012)
Doi, K., Li, J., Jiang, T.: Minimum recombinant haplotype configuration on tree pedigrees. In: Proceedings of Workshop on Algorithms in Bioinformatics (WABI), pp. 339–353 (2003)
Downey, R.G., Fellows, M.R.: Parameterized Complexity. Monogr. Comput. Sci. Springer, New York (1999)
Flum, J., Grohe, M.: Parameterized Complexity Theory. Springer, Berlin (2006)
Gramm, J., Niedermeier, R., Rossmanith, P.: Fixed-parameter algorithms for closest string and related problems. Algorithmica 37, 25–42 (2003)
Impagliazzo, R., Paturi, R.: The Complexity of k-SAT. In: Proceedings of the 14th IEEE Conference on Computational Complexity, pp. 237–240 (1999)
Li, J., Jiang, T.: An exact solution for finding minimum recombinant haplotype configurations on pedigrees with missing data by integer linear programming. In: Proceedings of Symposium on Computational Molecular Biology (RECOMB), pp. 20–29 (2004)
Li, J., Jiang, T.: Computing the minimum recombinant haplotype configuration from incomplete genotype data on a pedigree by integer linear programming. J. Comput. Biol. 12(6), 719–739 (2005)
Lin, G., Wang, Z., Wang, L., Lau, Y.-L., Yang, W.: Identification of linked regions using high-density SNP genotype data in linkage analysis. Bioinformatics 24(1), 86–93 (2008)
Ma, W., Yang, Y., Chen, Z.-Z., Wang, L.: Mutation region detection for closely related individuals without a known pedigree. IEEE/ACM Trans. Comput. Biol. Bioinform. 9(2), 499–510 (2012)
Ma, B., Sun, X.: More efficient algorithms for closest string and substring problems. SIAM J. Comput. 39, 1432–1443 (2009)
Marx, D.: Closest substring problems with small distances. SIAM J. Comput. 38, 1382–1410 (2008)
Qian, D., Beckmann, L.: Minimum recombinant haplotyping in pedigrees. Am. J. Hum. Genet. 70, 1434–1445 (2002)
Tapadar, P., Ghosh, S., Majumder, P.P.: Haplotyping in pedigrees via a genetic algorithm. Hum. Hered. 43, 56 (1999)
Wang, L., Zhu, B.: Efficient algorithms for the closest string and distinguishing string selection problems. In: Proceedings of the 3rd International Workshop on Frontiers in Algorithmics, pp. 261–270 (2009)
Xiao, J., Liu, L., Xia, L., Jiang, T.: Fast elimination of redundant linear equations and reconstruction of recombination-free Mendelian inheritance on a pedigree. In: Proceedings of ACM-SIAM Symposium on Discrete Algorithms (SODA), pp. 655–664 (2007)
Zhang, K., Sun, F., Zhao, H.: Haplore: a program for haplotype reconstruction in general pedigrees without recombination. Bioinformatics 21, 90–103 (2005)
Zhao, R., Zhang, N.: A more efficient closest string algorithm. In: Proceedings of the 2nd International Conference on Bioinformatics and Computational Biology (BICoB), pp. 210–215 (2010)
Acknowledgements
We thank the referees for very helpful comments. This work is supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. CityU 121608).
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Chen, ZZ., Ma, W. & Wang, L. The Parameterized Complexity of the Shared Center Problem. Algorithmica 69, 269–293 (2014). https://doi.org/10.1007/s00453-012-9730-7
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DOI: https://doi.org/10.1007/s00453-012-9730-7