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  Genome compartmentalization predates species divergence in the plant pathogen genus Zymoseptoria

Feurtey, A., Lorrain, C., Croll, D., Eschenbrenner, C. J., Freitag, M., Habig, M., et al. (2020). Genome compartmentalization predates species divergence in the plant pathogen genus Zymoseptoria. BMC Genomics, 21: 588. doi:10.1186/s12864-020-06871-w.

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 Creators:
Feurtey, Alice1, Author           
Lorrain, Cécile1, Author           
Croll, Daniel, Author
Eschenbrenner, Christoph J.1, Author           
Freitag, Michael, Author
Habig, Michael1, Author           
Haueisen, Janine1, Author           
Möller, Mareike1, Author           
Schotanus, Klaas1, Author           
Stukenbrock, Eva H.1, Author           
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1Max Planck Fellow Group Environmental Genomics, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_2068284              

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Free keywords: Genome evolution, Orphan genes, Effectors, Genome architecture, Accessory genes
 Abstract: Background:Antagonistic co-evolution can drive rapid adaptation in pathogens and shape genome architecture.Comparative genome analyses of several fungal pathogens revealed highly variable genomes, for many speciescharacterized by specific repeat-rich genome compartments with exceptionally high sequence variability. Dynamicgenome structure may enable fast adaptation to host genetics. The wheat pathogenZymoseptoria triticiwith itshighly variable genome, has emerged as a model organism to study genome evolution of plant pathogens. Here,we compared genomes ofZ. triticiisolates and of sister species infecting wild grasses to address the evolution ofgenome composition and structure.Results:Using long-read technology, we sequenced and assembled genomes ofZ. ardabiliae,Z. brevis,Z.pseudotriticiandZ. passerinii, together with two isolates ofZ. tritici. We report a high extent of genome collinearityamongZymoseptoriaspecies and high conservation of genomic, transcriptomic and epigenomic signatures ofcompartmentalization. We identify high gene content variability both within and between species. In addition, suchvariability is mainly limited to the accessory chromosomes and accessory compartments. Despite strong hostspecificity and non-overlapping host-range between species, predicted effectors are mainly shared amongZymoseptoriaspecies, yet exhibiting a high level of presence-absence polymorphism withinZ. tritici. Usingin plantatranscriptomic data fromZ. tritici, we suggest different roles for the shared orthologs and for the accessory genesduring infection of their hosts.Conclusion:Despite previous reports of high genomic plasticity inZ. tritici, we describe here a high level ofconservation in genomic, epigenomic and transcriptomic composition and structure across the genusZymoseptoria.The compartmentalized genome allows the maintenance of a functional core genome co-occurring with a highlyvariable accessory genome.

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Language(s): eng - English
 Dates: 2019-12-132020-06-262020-08-26
 Publication Status: Published online
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 Rev. Type: -
 Identifiers: DOI: 10.1186/s12864-020-06871-w
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Title: BMC Genomics
Source Genre: Journal
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Publ. Info: BioMed Central
Pages: - Volume / Issue: 21 Sequence Number: 588 Start / End Page: - Identifier: ISSN: 1471-2164
CoNE: https://pure.mpg.de/cone/journals/resource/111000136905010