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Briefings in Bioinformatics Advance Access published online on July 28, 2006
Briefings in Bioinformatics, doi:10.1093/bib/bbl021
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© The Author 2006. Published by Oxford University Press. For Permissions, please email: journals.permissions@oxfordjournals.org
Received April 20, 2006
Revised June 14, 2006

Original Papers

Navigating the HapMap

Michael R. Barnes *

* To whom correspondence should be addressed.
Michael R. Barnes, E-mail: Michael.R.Barnes{at}gsk.com


  Abstract

With the availability of the HapMap--a resource which describes common patterns of linkage disequilibrium (LD) in four different human population samples, we now have a powerful tool to help dissect the role of genetic variation in the biology of the genome. HapMap is entirely complimentary to the human genome map and so it is particularly fitting that it should be viewed in a full genomic context. However, characterization of high resolution LD across the genome can be a challenging task, owing in part to the sheer volume of data and the inherent dimensionality that its analysis entails. However, a number of tools are now available to make this task easier for researchers. This review will examine tools for viewing and analysing haplotype and LD data, enabling a number of tasks; including identification of optimal sets of haplotype tagging single nucleotide polymorphisms (SNPs); drawing links between associated SNPs and putative causal alleles; or simply viewing LD and haplotypes across a gene or region of interest. The data generated by the HapMap also has other important applications, informing, for example, on the demographic history and evidence of selection in human populations and on previously undetected regulatory relationships and gene networks. All of these properties make the HapMap no less an important resource than the human genome sequence itself and so this makes it essential viewing for all in the field of human biology.

Keywords: HapMap; haplotype; linkage disequilibrium; single nucleotide polymorphism; mutation; human selection; genome.

Michael Barnes leads a group supporting Target Genetics and Pharmacogenetics, within the Bioinformatics division at GlaxoSmithKline pharmaceuticals. He is also editor of the book, Bioinformatics for Geneticists.


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