Figure 1.—

Schematic relationships among genomes and locus types. (A) Phylogenetic relationship between the two copies of a WGD duplicate (ohnolog) in the three post-WGD genomes and their ortholog in the outgroup non-WGD genome. The paralogous copies are arbitrarily labeled copy A (red) and copy B (green). The WGD event is marked by a solid circle. (B) A locus included in the Scer–Scas pairwise comparison in the 2:2 category. AS and BS are shared evolutionary branches, and A1, A2, B1, and B2 are species-specific branches. (C) A locus included in the 2:1 category of the Scer–Cgla comparison.