Figure 4From: Genetic variation in brown trout Salmo truttaacross the Danube, Rhine, and Elbe headwaters: a failure of the phylogeographic paradigm?PCA of microsatellite frequency data. Principal components analysis based on microsatellite allele frequency data from 97 populations. Populations are colour-coded by major drainage, including hatcheries as a group. Populations carrying > 95% (blue bar) or between 70% and 95% (red bar) Danubian lineage mtDNA are additionally marked.Back to article page