Table 2.
Summary of block partitions and tag SNPs for the largest six data sets in dbSNP
| Data set | Population | Number of genotypes | Number of SNPs | Number of individuals | Number of blocks | Number of tag SNPs | Avg. block length (kb) | Number tag SNPs per kb |
|---|---|---|---|---|---|---|---|---|
| HAPMAP | CEU | 84,727,965 | 954,302 | 90 | 73,986 | 179,351 | 30.7 | 0.079 |
| HAPMAP | HCB | 18,443,054 | 411,568 | 45 | 41,381 | 94,583 | 40.2 | 0.057 |
| HAPMAP | JPT | 18,030,239 | 411,627 | 44 | 20,671 | 31,466 | 41.8 | 0.054 |
| HAPMAP | YRI | 38,661,518 | 431,505 | 90 | 67,111 | 157,287 | 21.5 | 0.109 |
| PERLEGEN | Afr | 35,568,060 | 1,569,392 | 23 | 235,139 | 569,182 | 9.1 | 0.267 |
| PERLEGEN | Asi | 37,417,872 | 1,572,384 | 24 | 86,636 | 211,972 | 26.9 | 0.090 |
| PERLEGEN | Eur | 37,399,120 | 1,570,560 | 24 | 109,212 | 274,153 | 21.8 | 0.115 |
| Affymetrix | Afr | 885,135 | 125,776 | 20 | 24,526 | 40,050 | 44.1 | 0.037 |
| Affymetrix | Cau | 1,534,726 | 125,778 | 20 | 27,561 | 47,957 | 37.2 | 0.047 |
| Affymetrix | Asi | 884,091 | 125,772 | 20 | 20,671 | 31,466 | 54.5 | 0.028 |
| Affymetrix | CEPH | 50 | 30 | 3 | 18,453 | 26,018 | 62.9 | 0.022 |
| Affymetrix | PDpanel | 2,869,641 | 125,776 | 24 | 35,048 | 67,154 | 26.11 | 0.073 |
| Affymetrix | APE | 15,823 | 9027 | 2 | 6253 | 6262 | 5.9 | 0.170 |
| TSC | ALL | 4,932,382 | 19,048 | 1963 | 31,886 | 46,789 | 21.8 | 0.075 |
| EGP | ALL | 3,184,170 | 37,737 | 90 | 3847 | 6643 | 2.9 | 0.590 |
| PGA/UW | Afr | 363,643 | 15,981 | 24 | 2833 | 5375 | 1.26 | 1.503 |
| PGA/UW | Eur | 209,551 | 9525 | 23 | 1086 | 2378 | 3.6 | 0.359 |