Species Identification, Genetic Diversity and Phenotypic Variation Studies on the Fusarium graminearum Complex Populations from Brazil

  • Emerson M. Del Ponte
  • Dauri J. Tessmann
  • Piérri Spolti
  • Paulo R. Kuhnem
  • Cleiltan N. da Silva


Fusarium graminearum sensu lato, the cause of Fusarium head blight (FHB), has been reported for more than 50 years in Brazil. However, it was only during the mid-1980s to late 1990s that FHB resurged as a primary concern of wheat production. More than a dozen studies in Brazil or elsewhere have been conducted since the year 2000 employing novel and accurate methods to explore genetic variability and identify the strains to phylogenetic species. Thus far, six species of the F. graminearum species complex (FGSC) have been reported in association with wheat, barley, oat, soybean, maize, rice and ryegrass in Brazil, and their prevalence rates appears to be dependent on the region and host surveyed. Although F. graminearum sensu stricto (s. str.) is dominant in wheat, F. meridionale is the most frequently found pathogen in maize, and F. asiaticum is the only species found in rice. Most of them preferentially exhibit specific trichothecene genotypes: F. graminearum s. str. is of the 15-acetyl-deoxynivalenol (DON) genotype, F. meridionale and F. asiaticum are of the nivalenol (NIV) genotype, and F. austroamericanum is of the 3-ADON genotype; an exception is that F. cortaderiae exhibits either the 3-ADON or NIV genotype. They have also exhibited differences in relation to their reproductive fitness, fungicide sensitivity and pathogenicity toward wheat and maize. Continuous monitoring of the genotypic and phenotypic traits of the FGSC populations will help to improve local disease management and contribute to the global knowledge of the biology of the pathogen.


Amplify Fragment Length Polymorphism Fusarium Head Blight Mycelial Growth Rate Galactose Oxidase Triazol Fungicide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Authors are thankful to the National Council for Scientific and Technological Development (CNPq) for both financial support and research fellowships for the first and second authors and scholarships for the remaining authors.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Emerson M. Del Ponte
    • 1
  • Dauri J. Tessmann
    • 2
  • Piérri Spolti
    • 1
  • Paulo R. Kuhnem
    • 1
  • Cleiltan N. da Silva
    • 2
  1. 1.Departamento de FitossanidadeUniversidade Federal do Rio Grande do SulPorto AlegreBrazil
  2. 2.Departamento de AgronomiaUniversidade Estadual de MaringáMaringáBrazil

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