Fig. 3
A. species trees (left: X phylogeny, right: WG phylogeny) with rearrangements per adjacency as branch lengths (× 10−3). The pie chart for a given species represents the adjacency degree of the genes of this species: orange represents genes with no adjacency, light blue genes with adjacency degree of 1 and green genes with adjacency degree of 2. Moreover, the diameter of each chart is proportional to the number of genes in the corresponding species