Phylogenetic relationships among species ofWilliopsis andSaturnospora gen. nov. as determined from partial rRNA sequences |
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| Authors: | Zhaowei Liu Cletus P. Kurtzman |
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| Affiliation: | (1) Microbial Properties Research, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, 61604 Peoria, Illinois, USA;(2) Present address: Agricultural Culture Collection of China, Soils and Fertilizers Institute, CAAS, 100081 Beijing, PRC |
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| Abstract: | Phylogenetic relationships among those yeast species that form saturn-shaped ascospores and which are assigned to the generaWilliopsis andPichia were estimated from their extent of nucleotide sequence divergence in three regions of ribosomal RNA. ThePichia species (P. dispora, P. saitoi, P. zaruensis andP. sp. nov.) are a closely clustered group only distantly related toWilliopsis, and it is proposed that they be reassigned toSaturnospora gen. nov. The extent of divergence amongWilliopsis species (W. californica, W. mucosa, W. pratensis, W. saturnus andW. sp. nov.) is greater than that previously observed within other ascomycetous yeast genera. |
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| Keywords: | phylogeny ribosomal RNA sequences Saturnospora Williopsis |
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