title: Biogeography of Fusarium graminearum species complex and chemotypes: a review.
abstract: Differences in the geographic distribution of distinct trichothecene mycotoxins in wheat and barley were first recorded two decades ago. The different toxicological properties of deoxynivalenol (DON), nivalenol (NIV) and their acetylated derivatives require careful monitoring of the dynamics of these mycotoxins and their producers. The phylogenetic species concept has become a valuable tool to study the global occurrence of mycotoxin-producing Fusarium species. This has revolutionised our views on the terrestrial distribution of trichothecene-producing Fusaria in the context of agronomics, climatic conditions, and human interference by the global trade and exchange of agricultural commodities. This paper presents an overview of the dynamics of the different trichothecene-producing Fusarium species as well as their chemotypes and genotypes across different continents. Clearly not one global population exists, but separate ones can be distinguished, sometimes even sympatric in combination with different hosts. A population with more pathogenic strains and chemotypes can replace another. Several displacement events appear to find their origin in the inadvertent introduction of new genotypes into new regions: 3-acetyl-DON-producing F. graminearum in Canada; 3-acetyl-DON-producing F. asiaticum in Eastern China; 15-acetyl-DON F. graminearum in Uruguay; and NIV-producing F asiaticum in the southern United States.
authors.affiliation: a Plant Research International Wageningen UR , Wageningen , the Netherlands.
authors.forename: Theo
authors.initials: T
authors.lastname: van der Lee
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.forename: Anne
authors.initials: A
authors.lastname: van Diepeningen
authors.forename: Cees
authors.initials: C
authors.lastname: Waalwijk
mesh_terms: D001315:Australia; D002170:Canada; D002681:China; D005060:Europe; D005506:Food Contamination / Q000032:analysis; D005516:Food Microbiology; D005670:Fusarium / Q000737:chemistry* / Q000145:classification* / Q000302:isolation & purification; D005838:Genotype; D001467:Hordeum / Q000382:microbiology; D007492:Iran; D009183:Mycotoxins / Q000032:analysis*; D009520:New Zealand; D010802:Phylogeny; D058974:Phylogeography; D056910:Republic of Korea; D014255:Trichothecenes / Q000032:analysis; D014908:Triticum / Q000382:microbiology; D014481:United States; D014583:Uruguay
chemical_list: D009183:Mycotoxins; D014255:Trichothecenes; C043247:3-acetyldeoxynivalenol; C038405:nivalenol; C046760:15-acetyldeoxynivalenol; C007262:deoxynivalenol
keywords: Fusarium; mycotoxins; population dynamics; trichothecenes