Figure 2.

Schematic of volvocine mating loci for (A) Gonium pectorale, (B) Chlamydomonas reinhardtii (modified from De Hoff et al. 2013), and (C) Volvox carteri (modified from Ferris et al. 2010), with rearranged (R) domains in light blue (minus/male) or pink (plus/female). For G. pectorale MT, syntenic blocs are indicated by gray shading, and labeled with upper case roman numbers (I–IV), while sequences that are unique to one of the two mating haplotypes are indicated with lower case roman numbers (v–vii). Red and blue shading on gene names indicates plus/female and minus/male specific genes, respectively. Gray dots beside gene names indicate those found in the R domains of all three species; dark blue triangles indicate presence of gene in R domain of G. pectorale and V. carteri only; green squares indicate presence of gene in R domain of C. reinhardtii and V. carteri only. No R domain genes are shared exclusively by G. pectorale and C. reinhardtii.