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Table 1 The number of SNPs present in each population and present in each commercial genotyping system

From: Power analysis for genome-wide association studies

Population CEU JPT+CHB YRI
SNPs in HapMap 3868157 3890416 3796934
SNPs w/MAF >= 0.05 (%) 2230515 (58%) 2046163 (53%) 2477182 (65%)
Common SNPs on Affy 100 K chip (%) 91400 (79%) 82995 (72%) 91363 (79%)
Common SNPs on Affy 500 K chip (%) 378415 (77%) 346887 (70%) 409849 (83%)
Common SNPs on Illumina 300 K chip (%) 313265 (99%) 251560 (79%) 252678 (80%)
Common SNPs on Illumina 550 K chip (%) 506543 (91%) 425631 (77%) 441884 (80%)
  1. The percentages given are the fraction of SNPs from the overall SNP set, and from each of the genotyping platforms, that are present with a MAF of at least 0.05 in each population