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A hybrid clustering and graph based algorithm for tagSNP selection

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Abstract

TagSNP selection, which aims to select a small subset of informative single nucleotide polymorphisms (SNPs) to represent the whole large SNP set, has played an important role in current genomic research. Not only can this cut down the cost of genotyping by filtering a large number of redundant SNPs, but also it can accelerate the study of genome-wide disease association. In this paper, we propose a new hybrid method called CMDStagger that combines the ideas of the clustering and the graph algorithm, to find the minimum set of tagSNPs. The proposed algorithm uses the information of the linkage disequilibrium association and the haplotype diversity to reduce the information loss in tagSNP selection, and has no limit of block partition. The approach is tested on eight benchmark datasets from Hapmap and chromosome 5q31. Experimental results show that the algorithm in this paper can reduce the selection time and obtain less tagSNPs with high prediction accuracy. It indicates that this method has better performance than previous ones.

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Acknowledgments

The work was supported by the Natural Science Foundation of China under Grant No. 60871092, No. 60741001 and No. 60671011, the China National 863 High Tech Program under Grant No. 2007AA01Z171, the Science Fund for Distinguished Young Scholars of Heilongjiang Province in China under Grant No. JC200611, and the Natural Science Foundation of Heilongjiang Province in China under Grant No. ZJG0705.

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Correspondence to Jun Wang.

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Guo, MZ., Wang, J., Wang, Cy. et al. A hybrid clustering and graph based algorithm for tagSNP selection. Soft Comput 13, 1143–1151 (2009). https://doi.org/10.1007/s00500-009-0419-z

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