Figure 3. (a) Optimal ADMIXTURE population assignments (K6) and
ancestry proportions for sampled New World Martes genomes,
indicating 2 independent populations within each species (M.
caurina blue and M. americana green) and two admixed individuals
(KUI, MTX: gray; see also Supplemental Information 10). Specimen ID’s
correspond to abbreviations in Table 1; (b) PSMC distributions of
historical demography for unadmixed samples scaled by a generation time
of 5 years (g) and general mammalian mutation rate (mu = 2.2 x
10-9) demonstrating 3 distinct demographic
trajectories: one for continental (C) M. caurina , one for insular
(Is.) M. caurina , and one for M. americana . Colors
correspond to the admixture plot in (a).