Figure 5. Schematic representation of a hypothesized route of post-glacial E. lucius expansion from a Eurasian refugium ~0.18 to 0.26 Mya.

The presence (blue silhouettes)/absence (red silhouettes) of amhby in different populations, showing that this MSD gene was lost in some North American populations during an out-of-Alaska dispersal around 0.1 Mya. The hypothesized refugium in the Ponto Caspian region is highlighted in beige. An alternative route of post-glacial dispersal is shown in Figure 5—figure supplement 1.

Figure 5—figure supplement 1. Schematic representation of an alternative hypothesized route of post-glacial E. lucius expansion from a Eurasian refugium ~0.18 to 0.26 Mya.