Ancestry Models

There are four main models for the ancestry of individuals: (1) no admixture model (individuals are discretely from one population or another); (2) the admixture model (each individual draws some fraction of his/her genome from each of the $K$ populations; (3) the linkage model (like the admixture model, but linked loci are more likely to come from the same population); (4) the prior information model (allows the user to assign some or all individuals to pre-defined populations). See Pritchard et al. (2000a) for more on models 1,2, and 4.