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• W2783238141 abstract "Abstract Fusarium graminearum of the 15-acetyl(A)deoxynivalenol(D0N) chemotype is the main cause of Fusarium head blight (FHB) of wheat in south of Brazil. However, 3-ADON and nivalenol(NIV) chemotypes have been found in other members of the species complex causing FHB in wheat. To improve our understanding of the pathogen ecology, we assessed a range of fitness-related traits in a sample of 30 strains representatives of 15-ADON ( F. graminearum ), 3-ADON ( F. cortaderiae and F. austroamericanum ) and NIV ( F. meridionale and F. cortaderiae ). These included: perithecia formation on three cereal-based substrates, mycelial growth at two suboptimal temperatures, sporulation and germination, pathogenicity towards a susceptible and a moderately resistant cultivar and sensitivity to tebuconazole. The most important trait favoring F. graminearum was its 2x higher sexual fertility (> 40% PPI = perithecia production index) than the other species (< 30% PPI); PPI varied among substrates (maize > rice > wheat). In addition, sensitivity to tebuconazole appeared lower in F. graminearum which had the only strain with EC50 > 1 ppm. In the pathogenicity assays, the DON-producers were generally more aggressive (1.5 to 2x higher final severity) towards the two cultivars, with 3-ADON or 15-ADON leading to higher area under the severity curve than the NIV strains in the susceptible and moderately resistant cv., respectively. There was significant variation among strains of a same species with regards asexual fertility (mycelial growth, macroconidia production and germination), which suggest a strain-rather than a species-specific differences. These results contribute new knowledge to improve our understanding of the pathogen-related traits that may explain the dominance of certain members of the species complex in specific wheat agroecosystems." @default.
• W2783238141 created "2018-01-26" @default.
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• W2783238141 date "2017-12-18" @default.
• W2783238141 modified "2023-09-27" @default.
• W2783238141 title "Fitness traits of deoxynivalenol and nivalenol-producing Fusarium graminearum species complex strains from wheat" @default.
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• W2783238141 doi "https://doi.org/10.1101/235895" @default.
• W2783238141 hasPublicationYear "2017" @default.
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