Intragenomic polymorphisms in the ITS region of high-quality genomes of the Hypoxylaceae (Xylariales, Ascomycota)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F20%3A00524627" target="_blank" >RIV/61388971:_____/20:00524627 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s11557-019-01552-9" target="_blank" >https://link.springer.com/article/10.1007/s11557-019-01552-9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11557-019-01552-9" target="_blank" >10.1007/s11557-019-01552-9</a>

Result language

angličtina

Original language name

Intragenomic polymorphisms in the ITS region of high-quality genomes of the Hypoxylaceae (Xylariales, Ascomycota)

Original language description

The internal transcribed spacer (ITS) region of the ribosomal DNA (rDNA) has been established (and is generally accepted) as a primary ´universal´ genetic barcode for fungi for many years, but the actual value for taxonomy has been heavily disputed among mycologists. Recently, twelve draft genome sequences, mainly derived from type species of the family Hypoxylaceae (Xylariales, Ascomycota) and the ex-epitype strain of Xylaria hypoxylon have become available during the course of a large phylogenomic study that was primarily aimed at establishing a correlation between the existing multi-gene-based genealogy with a genome-based phylogeny and the discovery of novel biosynthetic gene clusters encoding for secondary metabolites. The genome sequences were obtained using combinations of Illumina and Oxford nanopore technologies or PacBio sequencing, respectively, and resulted in high-quality sequences with an average N50 of 3.2 Mbp. While the main results will be published concurrently in a separate paper, the current case study was dedicated to the detection of ITS nrDNA copies in the genomes, in an attempt to explain certain incongruities and apparent mismatches between phenotypes and genotypes that had been observed during previous polyphasic studies. The results revealed that all of the studied strains had at least three copies of rDNA in their genomes, with Hypoxylon fragiforme having at least 19 copies of the ITS region, followed by Xylaria hypoxylon with at least 13 copies. Several of the genomes contained 2-3 copies that were nearly identical, but in some cases drastic differences, below 97% identity were observed. In one case, ascribable to the presence of a pseudogene, the deviations of the ITS sequences from the same genome resulted in only ca. 90% of overall homology. These results are discussed in the scope of the current trends to use ITS data for species recognition and segregation of fungi.

Czech name

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Czech description

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Type

J_imp - 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

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Mycological Progress

ISSN

1861-8952

e-ISSN

—

Volume of the periodical

19

Issue of the periodical within the volume

3

Country of publishing house

DE - GERMANY

Number of pages

11

Pages from-to

235-245

UT code for WoS article

000511789500005

EID of the result in the Scopus database

2-s2.0-85079155275