Table 3.
Posterior probabilities of superpopulation memberships in 6 test populations obtained by a GTM model trained with all superpopulations
| Population (pop) | P(AFR|pop) | P(AMR|pop) | P(EAS|pop) | P(EUR|pop) | P(SAS|pop) |
|---|---|---|---|---|---|
| ASW | 0.55 | 0.45 | 0 | 0 | 0 |
| ACB | 0.89 | 0.11 | 0 | 0 | 0 |
| MXL | 0 | 0.98 | 0 | 0.02 | 0 |
| GIH | 0 | 0 | 0 | 0 | 1 |
| STU | 0 | 0 | 0 | 0 | 1 |
| ITU | 0 | 0 | 0 | 0 | 1 |
NB: GTM classification models are restricted by an applicability domain defined by the training set. Here, the training set contains twenty 1000 Genomes Project, excluding [ASW, ACB, MXL, GIH, STU, ITU]. These posterior probabilities should be considered as a similarity measure between test populations and populations used to build the map, and not as an absolute measure of population admixture. Abbreviations: ASW = Americans of African Ancestry in SW USA; ACB = African Caribbeans in Barbados; MXL = Mexican Ancestry from Los Angeles USA; GIH = Gujarati Indian from Houston, Texas; STU = Sri Lankan Tamil from the UK; ITU = Indian Telugu from the UK; EUR = Europeans; EAS = East Asians; AMR = Admixed Americans; SAS = South Asians