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Title:HaploRec: Efficient and accurate large-scale reconstruction of haplotypes
Authors: Lauri Eronen ; Floris Geerts ; Hannu Toivonen
Date:Dec 2006
Publication Title:BMC Bioinformatics
Publisher:BioMed Central
Publication Type:Journal Article Publication Status:Published
Volume No:7 Page Nos:542
DOI:10.1186/1471-2105-7-542 ISBN/ISSN:1471-2105
Haplotypes extracted from human DNA can be used for gene mapping and other analysis of genetic patterns within and across populations. A fundamental problem is, however, that current practical laboratory methods do not give haplotype information. Estimation of phased haplotypes of unrelated individuals given their unphased genotypes is known as the haplotype reconstruction or phasing problem. We define three novel statistical models and give an efficient algorithm for haplotype reconstruction, jointly called HaploRec. HaploRec is based on exploiting local regularities conserved in haplotypes: it reconstructs haplotypes so that they have maximal local coherence. This approach not assuming statistical dependence for remotely located markers has two useful properties: it is well-suited for sparse marker maps, such as those used in gene mapping, and it can actually take advantage of long maps. Our experimental results with simulated and real data show that HaploRec is a powerful method for the large scale haplotyping needed in association studies. With sample sizes large enough for gene mapping it appeared to be the best compared to all other tested methods (Phase, fastPhase, PL-EM, Snphap, Gerbil; simulated data), with small samples it was competitive with the best available methods (real data). HaploRec is several orders of magnitude faster than Phase and comparable to the other methods; the running times are roughly linear in the number of subjects and the number of markers.
Links To Paper
1st Link
software is available freely for academic use only.
Bibtex format
author = { Lauri Eronen and Floris Geerts and Hannu Toivonen },
title = {HaploRec: Efficient and accurate large-scale reconstruction of haplotypes},
journal = {BMC Bioinformatics},
publisher = {BioMed Central},
year = 2006,
month = {Dec},
volume = {7},
pages = {542},
doi = {10.1186/1471-2105-7-542},
url = {},

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