TreeMix is a method for inferring the patterns of population splits and mixtures in the history of a set of populations. In the underlying model, the modern-day populations in a species are related to a common ancestor via a graph of ancestral populations. We use the allele frequencies in the modern populations to infer the structure of this graph.
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Pickrell JK and Pritchard JK.
Inference of population splits and mixtures from genome-wide allele frequency data.
PLoS Genet 8(11): e1002967. doi:10.1371/journal.pgen.1002967