Figure 3. Gene family evolution in Apocynaceae inferred from transcriptomes.

The ultrametric tree depicts the phylogenetic relationships and estimated divergence times of sampled Apocynaceae and outgroups (Coffea, Vitis). The number of gene birth/death/innovation events per gene per million years across all gene families is shown above the branches. Numbers following tip labels represent the observed number of P5βR gene family paralogs, and the inferred number of paralogs present in common ancestors is shown to the right of nodes.