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.