Fig. 2

The inferred evolutionary events leading to the emergence of the identified retrogene candidates. The numbers in boxes that are projected on the phylogeny of the three studied green algae represent the estimated count of evolutionary events based on the composition of the retrogene-containing gene clusters, the inferred phylogenetic trees of the retrogene-containing homologous gene families, and the analyzed synteny. Presented divergence dates according to Herron et al. [14]