Nucleotide composition bias of rDNA sequences as a source of phylogenetic artifacts in Basidiomycota-a case of a new lineage of a uredinicolous Ramularia-like anamorph with affinities to Ustilaginomycotina

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F21%3A00549670" target="_blank" >RIV/61388971:_____/21:00549670 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs11557-021-01749-x" target="_blank" >https://link.springer.com/article/10.1007%2Fs11557-021-01749-x</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11557-021-01749-x" target="_blank" >10.1007/s11557-021-01749-x</a>

Result language
angličtina
Original language name
Nucleotide composition bias of rDNA sequences as a source of phylogenetic artifacts in Basidiomycota-a case of a new lineage of a uredinicolous Ramularia-like anamorph with affinities to Ustilaginomycotina
Original language description
A Ramularia-like hyphomycete was discovered on uredinia of Phakopsora ampelopsidis on leaves of wild Ampelopsis brevipedunculata and cultivated Parthenocissus tricuspidata in several cities in Taiwan. The micromorphology of this fungicolous fungus is similar to that of species of the genus Ramularia which are mostly plant parasites but some species grow on rust fungi. Analyses of SSU and LSU rDNA and RPB2 gene sequence data and of ultrastructural features observed by scanning and transmission electron microscopy revealed that the fungus represents a novel lineage within the Ustilaginomycotina. The name Quasiramularia phakopsoricola is proposed for this new species in a new genus, a new family, and a new order. Sequence data obtained for ITS1, 5.8S, and ITS2 rDNA, however, did not match to any known fungal lineage. Bioinformatics analyses showed that these sequence data are extremely GC poor, but most probably do not represent a pseudogene. Extreme deviations of GC content can be observed in several lineages of Basidiomycota. Such variations affect the results of phylogenetic analyses and are an important source of artifacts.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10606 - Microbiology

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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