Fig. 5.

Illustration of the most highly supported evolutionary scenario (Scenario 4.1) in the ABC analysis of YST in Eurasia and the Americas, in relation to variation in plant size among regions. (a) Within Europe, eastern European populations diverged from those in Asia, and subsequently these two lineages admixed to form western European populations. The western European lineage then served as the primary source of the YST introduction to Chile, followed by introduction of the Chilean lineage to California. (b) Least Squares Means (+/− standard error of the mean) of a linear size index of biomass. Letters indicate significantly different regions based on Tukey’s HSD post-hoc tests.