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25S ribosomal RNA homologies of basidiomycetous yeasts: taxonomic and phylogenetic implicationsGenera, families, and possibly orders of basidiomycetous yeasts can be defined by 25S rRNA homology and correlated phenotypic characters. The teleomorphic genera Filobasidium, Leucosporidium, and Rhodosporidium have greater than 96 relative binding percent (rb%) intrageneric 25S rRNA homology and significant intergeneric separation from each other and from Filobasidiella. The anamorphic genus Cryptococcus can be defined by morphology (monopolar budding), colony color, and greater than 75 rb% intrageneric homology; Vanrija is heterogeneous. Agaricostilbum (Phragmobasidiomycetes, Auriculariales), Hansenula (Ascomycotera, Endomycota), Tremella (Phragmobasidiomycetes, Tremellales), and Ustilago (Ustomycota, Ustilaginales) appear equally unrelated to the Cryptococcus, Filobasidiella, and Rhodosporidium spp. used as probes. The Filobasidiaceae and Sporidiaceae, Filobasidiales and Sporidiales, form coherent homology groups which appear to have undergone convergent 25S rRNA evolution, since their relatedness is much greater than that indicated by 5S rRNA homology. Ribosomal RNA homologies do not appear to measure evolutionary distance.
Document ID
20040121551
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
Authors
Baharaeen, S.
(Oklahoma State University Stillwater 74078, United States)
Vishniac, H. S.
Date Acquired
August 22, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Canadian journal of microbiology
Volume: 30
Issue: 5
ISSN: 0008-4166
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: NAGW-26
Distribution Limits
Public
Copyright
Other

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