Phylogenetic tree of the species and reconstructed ancestors. Numbers on branches from the cetartiodactyl ancestor (CET) to the cattle lineage are the evolutionary breakpoint rates (the number of evolutionary breakpoints per 1 My), and labels in italics are significantly different from the mean rearrangement rate across all branches. The dotted line leading to chevrotain represents the split of Pecora from the other ruminants, whereas the number crossing the line is the combined ruminant/pecoran evolutionary breakpoint rate. Arrowheads indicate gene family expansions (purple) and contractions (blue) in each branch. Details of the new genomes used can be found in Supplemental Table S1. Additional details of the reconstructed phylogenetic trees, rearrangements rates, and gene family expansions and contractions are shown in Supplemental Figure S1 and Supplemental Tables S5 and S6. (CET) Cetartiodactyl ancestral node; (RUM) ruminant ancestral node; (PEC) pecoran ancestral node; (BOV) bovid ancestral node.
