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
 Crops Pathology and Genetics Research: Davis, CA
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Outreach Events
                        UC Davis Picnic Day
                                    Kinders go to College
                                    STEM Girls
                                    Future Scientist Program
                                    Agriculture Future of America
                                    Wallace-Carver Fellowship
                                    Young Scholars Program
                                    Annual Awards Banquet
                    About Us
                        About Us
                                    Our Mission
                                    Principal InvestigatorsSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Davis, California Crops Pathology and Genetics 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
- Etiology and Biology of Tree Crop Diseases
- Rice Genetics
- Sustainable Floriculture
- Sustainable Viticulture

Title:   Author  item
                                            TRAVADON, RENAUD - University Of Californiaitem
                                            Baumgartner, Kendraitem
                                            ROLSHAUSEN, PHILIPPE - University Of Californiaitem
                                            TROUILLAS, FLORENT - University Of Californiaitem
                                            GUBLER, W - University Of Californiaitem
                                            SOSNOWSKI, MARK - South Australian Research And Development Instituteitem
                                            LECOMTE, PASCAL - Institut National De La Recherche Agronomique (INRA)item
                                            HALLEEN, FRANCOIS - Agricultural Research Council Of South Africaitem
                                            PEROS, JEAN-PIERRE - Institut National De La Recherche Agronomique (INRA)
  Submitted to: Meeting Abstract
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 12/1/2009
                                    Publication  Date: 1/15/2010
                                    Citation: Travadon, R., Baumgartner, K., Rolshausen, P.E., Trouillas, F.P., Gubler, W.D., Sosnowski, M.R., Lecomte, P., Halleen, F., Peros, J. 2010. Intercontinental genetic structure of the fungal grapevine pathogen Eutypa lata. Phytopathologia Mediterranea. 49:108.Interpretive Summary:
                                Technical Abstract: The ascomycete fungus Eutypa lata, causal agent of Eutypa dieback of grapevine (Vitis vinifera), impacts all vineyard production systems worldwide. Our objectives were to characterize the population structure of E. lata at different geographical scales to identify migration patterns through ascospore dispersal, centers of diversity and new introductions areas. We genotyped 145 isolates from four vineyards, in each of two locations (California, South Australia), using nine polymorphic microsatellite loci. Results showed high levels of gene (H=0.56 to 0.62) and genotypic (G=0.85 to 1) diversity among the eight vineyards. There was no significant linkage disequilibrium among loci (P<0.01). We found that 93% of genetic variance was found within vineyards (P<0.01) and 3% of variance could be attributed to differences between California and South Australia (P<0.05). Three pair-wise comparisons revealed significant genetic differentiation between populations from these two continental regions (FST=0.03-0.10, P<0.05). When isolates were pooled by continental regions, genetic differentiation between the two populations was low, but significant (FST=0.03; P<0.05). These preliminary findings suggest that gene flow prevents genetic differentiation at the regional scale within continents, spanning distances up to 410 km, whereas continental populations are somewhat isolated. An additional collection of 156 isolates from Europe and South Africa, representing 12 vineyards populations, was recently obtained, and are currently being genotyped using the same nine microsatellite loci.


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