Phylogenetic relationship between W/S species and closest relatives are depicted based on the ML phylogeny using the same dataset as in Figure 2A, but with the addition of C. galacta. For each of the four relevant genes: ADH1, ADH6, SUC2, and PDC1, presence, absence, and the native or bacterial origin of the orthologs found in the cognate draft genomes are shown for each species next to the respective branch of the tree. Each gene is represented by circles with different line colors (blue for previously studied FFZ1 (Gonçalves et al., 2016), orange for ADH1, red for ADH6, yellow for PDC1, and purple for SUC2). For xenologs, the different predicted bacterial donor lineages are denoted by different fill colors as indicated in the key. For W/S-clade species, the number of paralogs found in the cognate draft genome is also shown. Inferred gene losses (cross) and HGTs events (arrows) are indicated in the tree using the same color codes.