Tree of genetic distances between Coregonus populations. Unrooted neighbor-joining tree of Nei's genetic distances between 10 populations of the Coregonus albula complex. Allopatric populations consist exclusively of C. albula and are named according to the lake of origin (indicated by white colour). Sympatric populations are named by lake origin and the lake-specific species names (indicated by grey colour). Bootstrap support (%) from 100,000 iterations is provided for each node. Values in parentheses report support after removal of outlier loci.