Fig. 1.

Phylogenetic tree based on partial sequences of β-tubulin. The tree was generated by the neighbor-joining method using 1,000 bootstrap replicates. Only the bootstrap values above 60% are indicated at the branches. The tree was rooted with outgroup taxa A. asperescens and A. multicolor. The strains marked by black circles were isolated from foods; the strains marked by white diamonds were isolated from environmental samples; the sequences of the unmarked strains were downloaded from GenBank.