Fig. 6

TreeMix maximum likelihood phylogeny with migration edges constructed using genotype data (15,498 single nucleotide polymorphisms) from eight European and American regional cattle population groups and the single CPC98 aurochs specimen. This phylogeny was generated with five migration edges with the first migration edge (labelled 1) hypothesized to be introgression from wild British aurochs into domestic cattle ancestral to the British, Irish and Northern European clade. The fifth migration edge (5) is hypothesized to be another introgression of wild British aurochs into domestic cattle ancestral to the England/Wales and Ireland subclade. The scale bar shows 10 times the mean standard error of the estimated entries in the sample covariance matrix