title: Fitness attributes of Fusarium graminearum isolates from wheat in New York possessing a 3-ADON or 15-ADON trichothecene genotype.
abstract: In all, 50 isolates of Fusarium graminearum from wheat spikes in New York, including 25 isolates each of the 15-acetyl-deoxynivalenol (15-ADON) and 3-ADON genotype, were tested to determine whether 3-ADON isolates are more fit for saprophytic survival and pathogenicity on wheat spikes than are 15-ADON isolates. The isolates were characterized and compared for 14 different attributes of saprophytic fitness and pathogenic fitness on a susceptible wheat variety. Isolates of the two genotypes could not be differentiated for most of these traits. Three principle components-ascospore production on corn stalks, total trichothecene amount in wheat kernels, and incidence of diseased spikelets up from the point of inoculation-accounted for 29.4, 18.9, and 10.8% of the variation among the isolates, respectively. A bootstrapping procedure grouped the isolates into two distinct groups, with 27 and 23 isolates each, with isolates from both genotypes represented in similar proportions (15-ADON/3-ADON, n = 14/13 and 11/12). Within the contemporary population of F. graminearum causing wheat head blight in New York, isolates with a 3-ADON genotype did not possess any detectable advantage over isolates with a 15-ADON genotype in saprophytic fitness or in pathogenic fitness on a susceptible wheat cultivar.
authors.forename: Pierri
authors.initials: P
authors.lastname: Spolti
authors.forename: Emerson M
authors.initials: EM
authors.lastname: Del Ponte
authors.forename: Jaime A
authors.initials: JA
authors.lastname: Cummings
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Dong
authors.forename: Gary C
authors.initials: GC
authors.lastname: Bergstrom
mesh_terms: D005670:Fusarium / Q000235:genetics / Q000254:growth & development / Q000472:pathogenicity / Q000502:physiology; D056084:Genetic Fitness; D005828:Genetics, Population; D005838:Genotype; D009518:New York; D010641:Phenotype; D010935:Plant Diseases / Q000382:microbiology*; D013045:Species Specificity; D014255:Trichothecenes / Q000378:metabolism*; D014908:Triticum / Q000382:microbiology*
chemical_list: D014255:Trichothecenes; C038972:acetyldeoxynivalenol; C046760:15-acetyldeoxynivalenol