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Among-population heterogeneity in linkage disequilibrium (LD). A collection of 107 single nucleotide polymorphisms (SNPs) spanning 1 Mbp of chromosome 22q was genotyped by Graffelman et al. (31) in samples from 28 different human populations. Plotted are the estimates of rho across this region in the major population groups studied in the HapMap project. There is an overall similarity across populations but also pronounced local differences.
