000K utf8 1100 $c2025 1500 eng 2050 urn:nbn:de:gbv:8:3-2025-00407-3 2051 10.1111/nph.20340 3000 Rojas-Barrera, Idalia C 3010 Alizadeh, Alireza 3010 Flores-Núñez, Victor M 3010 Haueisen, Janine 3010 Holtgrewe Stukenbrock, Eva 3010 Salimi, Fatemeh 4000 $hWiley [Rojas-Barrera, Idalia C] 4000 Evolution of sympatric host‐specialized lineages of the fungal plant pathogen Zymoseptoria passerinii in natural ecosystems$hWiley [Rojas-Barrera, Idalia C] 4030 $nWiley 4209 The barley disease Septoria Speckled Leaf Blotch, caused by the fungus Zymoseptoria passerinii, last appeared in North America in the early 2000s. Although rare in crops, field sampling of wild grasses in the Middle East revealed the disease persistence in wild barley. Identification of Z. passerinii in various wild barley species prompted us to examine genomic signatures of host specialization and trace the emergence of the domesticated-barley-infecting lineage. Furthermore, we applied virulence assays and confocal laser microscopy to evaluate whether the disease development differs between wild and domesticated barley. Wild- and domesticated-host-infecting populations have diverged, and phylogenetic relationships support the evolution of sympatric host-specialized lineages in wild hosts. Cross-virulence assays showed that Z. passerinii from domesticated hosts infect domesticated barley and its wild ancestor, Hordeum spontaneum. However, wild isolates from Iran did not infect domesticated barley. Wild and domesticated pathosystems have similar disease timing and progression, suggesting its persistence does not depend on a shorter period of incubation. The study supports that a wide range of hosts can foster the evolution of host-specialized lineages in sympatry and provide novel insights into the evolution of understudied fungal pathogens on wild hosts. 4950 https://doi.org/10.1111/nph.20340$xR$3Volltext$534 4950 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2025-00407-3$xR$3Volltext$534 4961 https://macau.uni-kiel.de/receive/macau_mods_00005939 5051 580 5550 Ascomycota 5550 Biological Evolution 5550 Ecosystem 5550 Hordeum 5550 Host-Pathogen Interactions 5550 Host Specificity 5550 Pathogens In Crop Origin Centers 5550 Phylogeny 5550 Plant Diseases 5550 Plant–pathogen Phylogenetics 5550 Septoria Speckled Leaf Blotch 5550 Sympatry 5550 Virulence 5550 Wild Pathosystems 5550 Wild‐plant Pathogens 5550 Zymoseptoria Passerinii