Fig. 1.

XYL pathway presence and xylose growth across a representative set of 332 Saccharomycotina species. Major yeast clades are depicted by branch color and are described in Shen et al. (2018). Presence of XYL homologs is indicated by filled boxes at tips; the innermost ring depicts XYL1 presence, followed by XYL2, then XYL3. Complete pathways of XYL1, XYL2, and XYL3 were found in 270 species. Species with nonzero growth rates in xylose medium are indicated by a filled red circle, and species unable to assimilate xylose are indicated by an empty red circle. Species without circles were not assayed for growth. Time-calibrated phylogeny from Shen et al. (2018).