U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Mycotoxin Prevention and Applied Microbiology Research: Peoria, IL
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    NCAUR homepageSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area Peoria, Illinois National Center for Agricultural Utilization Research Mycotoxin Prevention and Applied Microbiology Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications
- MPM Home Page
- Mission Statement
- Strategic Goals
- Major Accomplishments
- Visiting Scientists

Title:   Author  item
                                            Kelly, Amyitem
                                            CLEAR, RANDALL - Canadian Grain Commissionitem
                                            Kistler, Harolditem
                                            O Donnell, Kerryitem
                                            McCormick, Susanitem
                                            Busman, Markitem
                                            Ward, Todd
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 3/22/2014
                                    Publication  Date: 3/22/2014
                                    Citation: Kelly, A.C., Clear, R., Kistler, H.C., O'Donnell, K., McCormick, S.P., Busman, M., Ward, T.J. 2014. Spatio-temporal dynamics of Fusarium head blight and Trichothecene toxin types in Canada [abstract]. Fungal Genetics Conference.Interpretive Summary:
                                Technical Abstract: In many parts of the world Fusarium graminearum is the primary causal agent of Fusarium head blight (FHB), a disease of cereal crops that adversely affects crop yield, food safety, and animal health. We previously demonstrated population structure associated with differences in trichothecene toxin type (15ADON, 3ADON) and documented dramatic changes in pathogen composition in western Canada. To further understand spatio-temporal dynamics of FHB, we evaluated trichothecene diversity and population assignment of 4,086 F. graminearum isolates collected across Canada 2005-2007. In addition to 15ADON (62%) and 3ADON types (36%), we identified F. graminearum strains capable of producing the recently discovered A-trichothecene, NX-2 (2%) for the first time in Canada. Regional differences in trichothecene frequency were observed, resulting in two longitudinal clines in 3ADON frequency. Temporal patterns also varied regionally, with 3ADON increasing drastically in parts of western Canada, but remaining at relatively low frequency in Ontario and Quebec. Genetic structure remained correlated with toxin type, as the dominant population (NA1) consisted largely of 15ADON isolates, whereas a second population (NA2) consisted largely of 3ADON isolates. However, the rate of population misassignment based on trichothecene type (assignment of 15ADON to NA2 or 3ADON to NA1) increased rapidly, indicating that gene flow is uncoupling trichothecene type from genetic population identity. Gene flow was regionally biased, in that 15ADON misassignment rate was > 3-fold higher than 3ADON misassignment rate in western and Maritime provinces, and in both regions 15ADON misassignment increased over time. In contrast, 3ADON misassignment rate increased annually and was 5-fold higher than 15ADON misassignment rate in eastern provinces. FHB population diversity is being shaped by dramatically different local selective pressures across Canada. Understanding ecological processes contributing to local selection of different FHB pathogens will aid in the development of novel strategies to control FHB and mycotoxins in cereals.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov