Phylogenetic analysis of Aspergillus sections Cremei and Wentii, based on ribosomal DNA sequences

Phylogenetic Analysis of Aspergillus Section Circumdati Based on Sequences of the Internal Transcribed Spacer Regions and the 5.8 S rRNA Gene

“…SmaI-digested ribosomal DNA profiles of A. lanosus and P. alliaceus were found to be identical (Croft and Varga, 1994), and secondary metabolite profiles of these species were also found to be similar (J. C. Frisvad, personal communication). A. sepultus and A. dimorphicus were related to A. wentii, which has recently been assigned to section Cremei based on molecular and morphological data (Peterson, 1995). This result is supported by the observation that all these species bear Q-9 as their main ubiquinone (Table 1), that none of them grow on CZA b As determined by Kuraishi et al (1990).…”

“…Several phenotypic and genotypic approaches have been applied recently to clarify the taxonomic relationships within the Aspergillus genus (Geiser et al, 1998a,b;Mugnier, 1998;Peterson, 1995;Sugiyama, 1998;Varga et al, 1999Varga et al, , 2000. However, taxonomic studies on species of Aspergillus section Circumdati are limited.…”

Cryptic speciation and recombination in the aflatoxin-producing fungus Aspergillus flavus

“…Like many apparently asexual fungi, A. flavus has a close relative that is capable of sexual reproduction, Petromyces alliaceus (30)(31)(32). In culture, A. flavus produces hardened asexual structures called ''sclerotia'' that look very much like the sexual structures produced by P. alliaceus and may be homologous to them (33,34).…”

Evolutionary relationships within Aspergillus section Flavi based on sequences of the intergenic transcribed spacer regions and the 5.8S rRNA gene.

“…Since then, a new species, A. caelatus, was described (Horn, 1997). Peterson (1995) observed that A. terricola and A. thomii were also better placed in this section, while Varga et al (2000aVarga et al ( , 2000b found that A. lanosus and anamorphs of Petromyces alliaceus and P. albertensis are closely related to Aspergillus section Flavi. These three taxa are currently assigned in the section Circumdati.…”

“…Two additional species, A. coremiiformis and A. toxicarius have also been treated as members of this section by Christensen (1981). Consequently, species characterized by ubiquinone systems Q-10 and Q-10(H 2 ) are equally included in this section, indicating that Aspergillus section Flavi is non-monophyletic Peterson, 1995Peterson, , 2000.…”