Species composition, toxigenic potential and pathogenicity of Fusarium graminearum species complex isolates from southern Brazilian rice

• DOI: 10.1111/ppa.12332
• Publication Date: 2014-11-25T07:33:23Z
• Authors: L. B. Gomes; T. J. Ward; E. Badiale‐Furlong; E. M. Del Ponte
• Keywords: Panicle

This study aimed to assess the extent and distribution of F usarium graminearum species complex ( FGSC ) diversity in rice seeds produced southern B razil. Four two trichothecene genotypes were detected among 89 isolates, based on a multilocus genotyping assay: . asiaticum (69·6%) with nivalenol NIV genotype, (14·6%) 15‐acetyldeoxynivalenol ADON cortaderiae meridionale (1·1%), both genotype. Seven selected isolates from rice‐based substrate vitro , at levels ranging 4·7 84·1 μ g −1 Similarly, mainly 15‐ c. 15–41 smaller amount 3‐ 6–12 ). One did not produce detectable trichothecenes. Two wheat (from previous study), one isolate wheat, pathogenic crops various aggressiveness measures disease severity spikes kernel infection greenhouse assay. reference deoxynivalenol acetylates, respectively, kernels inoculated heads. No was panicles by any isolates. These findings constitute first report composition outside A sia, confirm dominance agroecosystems.