Tag: Genes and geography

Reprising genes & geography

By Razib Khan | April 16, 2012 11:25 pm

Comparing Spatial Maps of Human Population-Genetic Variation Using Procrustes Analysis:

Recent applications of principal components analysis (PCA) and multidimensional scaling (MDS) in human population genetics have found that “statistical maps” based on the genotypes in population-genetic samples often resemble geographic maps of the underlying sampling locations. To provide formal tests of these qualitative observations, we describe a Procrustes analysis approach for quantitatively assessing the similarity of population-genetic and geographic maps. We confirm in two scenarios, one using single-nucleotide polymorphism (SNP) data from Europe and one using SNP data worldwide, that a measurably high level of concordance exists between statistical maps of population-genetic variation and geographic maps of sampling locations….

There is concordance. But look at the figure below. On the left are populations where they were sampled, and the right shows the populations displayed in a manner to reflect genetic distances.

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CATEGORIZED UNDER: Anthroplogy
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