Fig. 3
Phylogenetic placement of admixed samples and historical demography. a–c Optimal phylogenetic placement of hybrid samples onto our non-admixed RAxML topology (see also Supplementary Fig. 5) based on f4-statistics fitting in Admixture Graph. a SYT originates from ancestors of Beringia and East populations; b YTAK is admixed from East and an unsampled ancestor of all M. erminea lineages; c NPC stems from ancestors of Beringia and East clades. (d distributions of effective population sizes (Ne) through time from pairwise sequential Markovian coalescent (PSMC) analysis scaled by a general mammalian mutation rate (2.2 × 10−9) and a 2-year generation time. d PSMC plots for a representative from each refugial population (East, West, Beringia, NPC). e PSMC plots for hybrid samples (YTAK, SYT, NPC) and their source populations (Beringia, East). Hybrid distributions mimic that of their most-backcrossed source (f 4 ) with artefactual Ne inflation, as expected for admixed demographic histories
