Figure 2.

Intron status and phylogenetic relationships of yeasts. Bootstrap consensus tree (1,000 replicates) obtained from a maximum parsimony branch-and-bound analysis of 18S + 5.8S data, with gaps scored as fifth bases. The bootstrap score for each branch is shown. Likelihood analyses gave the same topology. The root is inferred from a larger analysis of 18S rDNA of hemiascomycete yeasts (ref. 20 and unpublished observations). (Inset) A separate analysis of the Saccharomyces sensu stricto, using complete internal transcribed spacer sequence data and a parsimony branch-and-bound bootstrap analysis (1,000 replicates). Numbers in parentheses identify the Centraalbureau Voor Schimmelcultures cultures; the genus “T.” is Torulaspora. t indicates the type strain.