Diversity of Fusarium head blight populations and trichothecene toxin types reveals regional differences in pathogen composition and temporal dynamics

•Diversity and trichothecene genotypes of F. graminearum in Canada were analyzed.•Trichothecene type frequency and pathogen population dynamics varied by region.•Region-specific biases in the composition of recombinant genotypes were observed.•Trichothecene type is an increasingly unreliable marker...

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Bibliographic Details
Published in:Fungal genetics and biology 2015-09, Vol.82, p.22-31
Main Authors: Kelly, Amy C., Clear, Randall M., O’Donnell, Kerry, McCormick, Susan, Turkington, T. Kelly, Tekauz, Andy, Gilbert, Jeannie, Kistler, H. Corby, Busman, Mark, Ward, Todd J.
Format: Article
Language:English
Subjects:
15ADON
3ADON
Canada
Fusarium - genetics
Fusarium - metabolism
Fusarium - pathogenicity
Fusarium graminearum
Fusarium head blight
Gene Frequency
genetic background
genetic techniques and protocols
Genetic Variation
Genetics, Population
Genotype
geographical variation
introduced species
landscapes
Manitoba
Minisatellite Repeats
Multilocus Sequence Typing
NX-2
Ontario
pathogens
Plant Diseases - microbiology
population dynamics
Population genetics
population structure
Quebec
Recombination, Genetic
sampling
Spatio-Temporal Analysis
species dispersal
strains
temporal variation
Trichothecene
trichothecenes
Trichothecenes - metabolism
Triticum - microbiology
Triticum aestivum
wheat
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Summary:•Diversity and trichothecene genotypes of F. graminearum in Canada were analyzed.•Trichothecene type frequency and pathogen population dynamics varied by region.•Region-specific biases in the composition of recombinant genotypes were observed.•Trichothecene type is an increasingly unreliable marker of population identity.•F. graminearum that produce NX-2 were identified for the first time in Canada. Analyses of genetic diversity, trichothecene genotype composition, and population structure were conducted using 4086 Fusarium graminearum isolates collected from wheat in eight Canadian provinces over a three year period between 2005 and 2007. The results revealed substantial regional differences in Fusarium head blight pathogen composition and temporal population dynamics. The 3ADON trichothecene type consistently predominated in Maritime provinces (91%) over the sampled years, and increased significantly (P
ISSN:1087-1845
1096-0937
DOI:10.1016/j.fgb.2015.05.016