Systematics of the ascomycetous yeasts assessed from ribosomal RNA sequence divergence |
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Authors: | C. P. Kurtzman |
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Affiliation: | (1) U.S. Department of Agriculture, Microbial Properties Research, National Center for Agricultural Utilization Research, Agricultural Research Service, 61604 Peoria, IL, USA |
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Abstract: | Extent of divergence in partial nucleotide sequences from large and small subunit ribosomal RNAs was used to estimate genetic relationships among ascomycetous yeasts and yeastlike fungi. The comparisons showed four phylogenetically distinct groups comprised of the following taxa: Group 1. The budding yeastsSaccharomyces, Saccharomycopsis, Debaryomyces, Metschnikowia, Saturnospora, andLipomyces, and the yeastlike generaAscoidea, Cephaloascus, Dipodascus, Dipodascopsis, andGalactomyces; Group 2.Eremascus, Emericella andCeratocystis; Group 3.Taphrina andProtomyces; Group 4.Schizosaccharomyces. Because of the genetic relationships indicated by sequence analysis, Group 1 taxa are retained in the order Endomycetales, andSchizosaccharomyces is retained in the Schizosaccharomycetales Prillinger et al. ex Kurtzman. |
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Keywords: | endomycetales phylogeny ribosomal RNA schizosaccharomycetales taxonomy yeasts |
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