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Frédéric Suffert

@wheatpath.bsky.social

Plant disease epidemiologist @inrae-france.bsky.social studying wheat fungal pathogens, mostly Zymoseptoria | Enthusiatic about rust & wild pathosystems | IngAgro PhD IHEDN | https://tinyurl.com/fsuffert

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Frédéric Suffert@wheatpath.bsky.social · last mo.

Advanced host‒pathogen interactions in #wheat and #Zymoseptoria tritici: invasion strategies and plant defense mechanisms doi.org/10.1007/s413...

Advanced host‒pathogen interactions in wheat and Zymoseptoria tritici: invasion strategies and plant defense mechanisms - Journal of Plant Diseases and Protection

Bread wheat (Triticum aestivum) is a cornerstone of global food security, yet its productivity is severely threatened by numerous abiotic and biotic stresses, including Zymoseptoria tritici, the causal agent of Septoria tritici blotch (STB). STB is among the most destructive wheat diseases, causing yield losses up to 50% in Europe and 82% in Ethiopia. While fungicides are the primary control strategy, their cost, environmental impact and the emergence of resistant pathogen populations necessitate sustainable, genetics-based solutions. This review synthesizes current knowledge on wheat–Z. tritici interactions, including invasion mechanisms, host defense responses, and genetic resistance. We compiled 331 STB-resistance QTLs from over 20 studies (2003–2025) and identified the B genome as a major reservoir of resistance, harboring 140 QTLs. Chromosome 2B contained the highest QTL count (31), followed by 7 A and 7B, with 25 and 24 QTLs, respectively. Chromosome-wise QTL density per 100 Mb was also highest on 2B (3.34), 7 A (3.08), and 7B (2.70), highlighting regions as priority targets for fine mapping and marker-assisted breeding. Furthermore, several QTLs co-localize with established Stb genes, most notably Stb6, Stb4, Stb11, Stb18, Stb2, Stb8 and Stb9, highlighting genomic hotspots and potential for novel gene discovery. Regarding resistance type, 51% of compiled QTLs confer adult-plant resistance, 29.6% provide seedling resistance, and 19.3% are effective at both stages. Overall, this review provides a comprehensive overview of the host-pathogen interaction. It underscores the necessity of integrating genetic, genomic, and evolutionary insights to develop durable, resilient, and environmentally sustainable wheat varieties to safeguard global food sources.

doi.org

Sandra V. Gomez-Gutierrez@sgomezguti.bsky.social · last mo.

Happy to finally see this as a preprint in bioRxiv Genetics. We were able to disrupt a target effector gene using CRISPR/Cas9 in Zymoseptoria tritici for the first time. Thanks to our collaborators from @w-u-r.bsky.social who shared and contributed all their knowledge and experience!

bioRxiv Genetics@biorxiv-genetic.bsky.social · 2mo ago

Development of a CRISPR/Cas9-mediated transformation procedure for the wheat pathogen Zymoseptoria tritici https://www.biorxiv.org/content/10.64898/2026.05.27.728285v1

Frédéric Suffert@wheatpath.bsky.social · 2mo ago

The recovery test from #Berberis vulgaris to the presumed primary host, #Arrhenatherum elatius, was also successful 🥰, confirming the id of the #rust as #Puccinia arrhenatheri: pustules appeared on the upper leaf face and were larger than those of P. graminis (30–34 × 26–28 µm).

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Frédéric Suffert@wheatpath.bsky.social · 2mo ago

The recovery of #Puccinia graminis from aecia on #Berberis is nearing completion, with 36 samples collected in 2026 tested on a dozen grass and cereal species. Third year of data for Alicia Culot's PhD thesis, providing valuable information on primary hosts and formae speciales.

Frédéric Suffert@wheatpath.bsky.social · 2mo ago

The recovery of #Puccinia graminis from aecia on #Berberis is nearing completion, with 36 samples collected in 2026 tested on a dozen grass and cereal species. Third year of data for Alicia Culot's PhD thesis, providing valuable information on primary hosts and formae speciales.

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Frédéric Suffert@wheatpath.bsky.social · 3mo ago

First 2026 sampling day for stem #rust (#Puccinia graminis) on barberry (#Berberis vulgaris) around Dijon. On the Chenôve plateau, the aecia are already showing up!

Frédéric Suffert@wheatpath.bsky.social · 3mo ago

#Russia is increasing pressure on #Armenia in response to its rapprochement with the EU. New example illustrating “Plant #biosecurity and #phytosanitary regimes under threat from instrumentalization dynamics”. My analysis here, more relevant than ever ▶️ dx.doi.org/10.2139/ssrn...

Jelger Groeneveld@jelgerg.bsky.social · 3mo ago

The predictability is obvious. Russia restricts flower imports from Armenia, while a team of the Russian Veterinary and Phytosanitary Surveillance is in Armenia to conduct joint inspections at Armenian companies producing plant- and animal-based products. www.themoscowtimes.com/2026/05/21/r...