Evolutionary relationships of membrers of the generaTaphrina, Protomyces, Schizosaccharomyces, and related taxa within the archiascomycetes: Integrated analysis of genotypic and phenotypic characters |
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Authors: | Wellyzar Sjamsuridzal Yoshito Tajiri Hiromi Nishida Ta Bich Thuan Hiroko Kawasaki Aiko Hirata Akira Yokota Junta Sugiyama |
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Institution: | (1) Institute of Molecular and Cellular Biosciences, The University of Tokyo, 1-1, Yayoi 1-chome, Bunkyo-ku, 113 Tokyo, Japan;(2) Present address: Saga Research Institute, Otsuka Pharmaceutical Co., Ltd., Higashisefurison, Kanzaki-gun, 842-01 Saga, Japan;(3) Present address: The Centre for Mycological Research of National University-Hanoi, 90 Nguyen Trai, Hanoi, Vietnam;(4) Present address: International Center for Biotechnology, Osaka University, 565 Suita, Osaka, Japan |
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Abstract: | To study the phylogeny and evolution of archiascomycetes, we determined the full sequence of the nuclear 18S rRNA gene from
14Taphrina species and 2Protomyces species, and the partial sequence ofSchizosaccharomyces japonicus var.japonicus. The sequences were phylogenetically analyzed by the neighbor-joining, maximum parsimony, and maximum-likelihood methods.
We also looked at their principal phenotypic characters and genotypic character. Relationships within the Ascomycota are concordant
with the previously published phylogenies inferred from 18S rDNA sequence divergence and divide the archi-, hemi-and euascomycetes
into distinct major lineages. All the trees show that, within the archiascomycete lineage, 11 of the 14Taphrina species and the 2Protomyces species are monophyletic. A core groups ofTaphrina andProtomyces is always monophyletic. The evidence from molecular and phenotypic characters such as cell wall sugar composition, ubiquinone,
cell wall ultrastructure, and mode of conidium ontogeny, strongly suggests that ‘T’. californica CBS 374.39, ‘T’. maculans CBS 427.69 and ‘T’. farlowii CBS 376.39 should be excluded from the archiascomycete lineage. ‘Taphrina’ farlowii CBS 376.39 groups withCandida albicans in the Saccharomycetales, whereas ‘T’. californica CBS 374.39 and ‘T’. maculans CBS 427.69 have a basidiomycete affinity and group with Tremellalean members in the hymenomycete lineage.Schizosaccharomyces is monophyletic. The strictly anamorphic yeastSaitoella complicata groups with the apothecial ascomyceteNeolecta vitellina rather than theTaphrina/Protomyces branch. |
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Keywords: | archiascomycetes 18S ribosomal RNA gene phylogeny Protomyces Schizosaccharomyces Taphrina |
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