Author
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Kurtzman, Cletus |
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Submitted to: Meeting Abstract
Publication Type: Abstract Only Publication Acceptance Date: 4/24/2015 Publication Date: 4/24/2015 Citation: Kurtzman, C.P. 2015. Saccharomycotina and Taphrinomycotina – progress in circumscription of genera [abstract]. Interpretive Summary: Technical Abstract: Much progress has been made in understanding relationships among the yeasts. DNA barcoding (D1/D2, ITS) has provided a rapid means for species identification and phylogenetic analysis of gene sequences has shown that the Ascomycota is comprised of three major lineages, i.e, Saccharomycotina (budding yeasts), Pezizomycotina (‘filamentous fungi’), and Taphrinomycotina (fission yeasts and related). Phylogenetic analysis is leading to a major revision of yeast systematics that will result in redefinition of nearly all genera. Further impacting these changes are new rules in the recently implemented International Code of Nomenclature for algae, fungi, and plants (Melbourne Code), which allows inclusion of anamorphic and teleomorphic species in the same genus. Some yeast genera now seem to be clearly resolved, but others will require additional sequence data to define boundaries. Genera that appear clearly resolved include Tortispora, Brettanomyces (Dekkera), Saturnispora, Saccharomyces, and others. Less resolved genera include Kazachstania, Metschnikowia, and certain other of the larger genera. The genus Candida will be circumscribed around C. tropicalis and C. albicans with the approximately 400 unrelated species assigned to extant genera, or placed in new genera when there are no close relationships to known genera. Examples of well circumscribed genera will be given along with discussion of poorly resolved genera. |
