Phylogeny of anaerobic fungi (phylum Neocallimastigomycota ), with contributions from yak in China
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2016
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Abstract
The phylum Neocallimastigomycota contains eight genera (about 20 species) of strictly anaerobic fungi. The evolutionary relationships of these genera are uncertain due to insufficient sequence data to infer their phylogenies. Based on morphology and molecular phylogeny, thirteen isolates obtained from yak faeces and rumen digesta in China were assigned to Neocallimastix frontalis (nine isolates), Orpinomyces joyonii (two isolates) and Caecomyces sp. (two isolates), respectively. The phylogenetic relationships of the eight genera were evaluated using complete ITS and partial LSU sequences, compared to the ITS1 region which has been widely used in this phylum in the past. Five monophyletic lineages corresponding to six of the eight genera were statistically supported. Isolates of Caecomyces and Cyllamyces were present in a single lineage and could not be separated properly. Members of Neocallimastigomycota with uniflagellate zoospores represented by Piromyces were polyphyletic. The Piromyces-like genus Oontomyces was consistently closely related to the traditional Anaeromyces, and separated the latter genus into two clades. The phylogenetic position of the Piromyces-like genus Buwchfawromyces remained unresolved. Orpinomyces and Neocallimastix, sharing polyflagellate zoospores, were supported as sister genera in the LSU phylogeny. Apparently ITS, specifically ITS1 alone, is not a good marker to resolve the generic affinities of the studied fungi. The LSU sequences are easier to align and appear to work well to resolve generic relationships. This study provides a comparative phylogenetic revision of Neocallimastigomycota isolates known from culture and sequence data.
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wang2016antoniephylogeny
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| Authors | Xuewei Wang;Xingzhong Liu;Johannes Z. Groenewald;Xuewei Wang;Xingzhong Liu;Johannes Z. Groenewald; |
| Journal | antonie van leeuwenhoek |
| Year | 2016 |
| DOI |
doi:10.1007/s10482-016-0779-1
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