Figure 3.—

Phylogenetic relationship among strains. Phylogenetic tree obtained from the concatenated analysis of NEJ1, EST2, yKU70, and yKU80 (total length of 7.4 kbp). TLC1 and SPT4 were excluded from the analysis because they were missing from some strains. The tree was obtained using the neighbor-joining algorithm with 1000 bootstrap iterations. The tree was rooted at the S. bayanus branch according to Rokas et al. (2003) and 100% of bootstrap value is indicated. The scale represents the number of nucleotide substitutions. An asterisk indicates strains with gross chromosomal rearrangements and colored dots indicate geographic origin (blue, North and South America; red, Europe; yellow, Far East; green, Africa; orange, Middle East).