FIGURE LEGENDS
Figure 1 : fastSTRUCTURE assignment for each individual ofR. flavipes for K = 4. Each vertical bar represents an individual and each color represents a distinct genetic cluster. Individual fastSTRUCTURE assignments are geographically located in the native and introduced ranges of R. flavipes .
Figure 2 : Principal Component Analysis (PCA) ofReticulitermes flavipes individuals. Individuals are grouped according the Discriminant Analysis of Principal Components (DAPC) with best support for K = 4 genetic clusters.
Figure 3 : Co-ancestry matrix between each pair of individuals inferred using fineRADstructure. Each pixel represents a pair of individuals. Co-ancestry coefficients between two individuals are designated on a color spectrum. Low values are shown in yellow; higher values are shown in darker colors.
Figure 4 : Maximum likelihood phylogenetic tree ofReticulitermes flavipes individuals from RAxML. Individuals are colored according to their fastSTRUCTURE assignments (K = 4). Samples from the introduced ranges are highlighted with an emphasized tip. The phylogenetic tree is rooted with 10 R. virginicus samples.
Figure 5 : Graphical representation of the invasion pathway ofReticulitermes flavipes out of eastern USA inferred through ABC RF in France, Canada and Chile. For each introduction event out of the native range, the insets represent the most likely native source populations. All scenarios tested and results for each ABC step, as well as all of the posterior parameter estimates, are provided in the Supplementary Information.