Fig 4. Genetic affinity and admixture proportions.

A) Wolf vs. coyote ancestry proportions estimated from f4 ratios, using the ‘Daneborg’ Polar wolf, and the ‘Mexico’ coyote as representatives of the two groups respectively. * indicates samples with erroneous estimates, either due to closeness to ‘Eurasia 1’ (‘Alaska 1’), or paucity of data (‘Krummelangsø’). The f4 ratios can be used to quantify the amount of admixture from different source groups, based on the sharing of alleles, as computed by the f4 statistics [59]. B) Genetic affinity of each sample to the ‘Daneborg’ Polar wolf, computed as the f3 statistic using the ‘Golden Jackal’ as the outgroup. The symbols are plotted on a blue-red scale, where blue indicates higher affinity and red indicates lower affinity. Circles represent grey wolves and squares indicate wolf-like canids.