Sep 2, 2008

Genes mirror geography within Europe

Nature
John NovembreCarlos D Bustamante

Abstract

Understanding the genetic structure of human populations is of fundamental interest to medical, forensic and anthropological sciences. Advances in high-throughput genotyping technology have markedly improved our understanding of global patterns of human genetic variation and suggest the potential to use large samples to uncover variation among closely spaced populations. Here we characterize genetic variation in a sample of 3,000 European individuals genotyped at over half a million variable DNA sites in the human genome. Despite low average levels of genetic differentiation among Europeans, we find a close correspondence between genetic and geographic distances; indeed, a geographical map of Europe arises naturally as an efficient two-dimensional summary of genetic variation in Europeans. The results emphasize that when mapping the genetic basis of a disease phenotype, spurious associations can arise if genetic structure is not properly accounted for. In addition, the results are relevant to the prospects of genetic ancestry testing; an individual's DNA can be used to infer their geographic origin with surprising accuracy-often to within a few hundred kilometres.

  • References17
  • Citations434
  • References17
  • Citations434

Citations

Mentioned in this Paper

Genetic Drift
Genome-Wide Association Study
Labor Migration
Human Genetics
Genetics, Population
Phylogeny
Human Geography
Quantitative Trait, Heritable
Sample Size
Genetic Structures

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