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dc.contributorYahyaoui, Amoren_US
dc.contributorMilus, Eugeneen_US
dc.contributorFejer Justesen, Annemarieen_US
dc.creatorHovmøller, Mogens S.en_US
dc.identifier.citationMogens S. Hovmøller, Amor Yahyaoui, Eugene Milus, Annemarie Fejer Justesen. (1/9/2008). Rapid global spread of two aggressive strains of a wheat rust fungus. Molecular Ecology, 17 (17), pp. 3818-3826.en_US
dc.description.abstractRust fungi can overcome the effect of host resistance genes rapidly, and spores can disperse long distance by wind. Here we demonstrate a foreign incursion of similar strains of the wheat yellow rust fungus, Puccinia striiformis f. sp. tritici, in North America, Australia and Europe in less than 3 years. One strain defined by identity at 15 virulence loci and 130 amplified fragment length polymorphism (AFLP) fragments was exclusive to North America (present since 2000) and Australia (since 2002). Another strain of the same virulence phenotype, but differing in two AFLP fragments, was exclusive to Europe (present since 2000–2001) as well as Western and Central Asia and the Red Sea Area (first appearance unknown). This may be the most rapid spread of an important crop pathogen on the global scale. The limited divergence between the two strains and their derivatives, and the temporal–spatial occurrence pattern confirmed a recent spread. The data gave evidence for additional intercontinental dispersal events in the past, that is, many isolates sampled before 2000 in Europe, North America and Australia had similar AFLP fingerprints, and isolates from South Africa, which showed no divergence in AFLP, differed by only two fragments from particular isolates from Central Asia, West Asia and South Europe, respectively. Previous research has demonstrated that isolates of the two new strains produced up to two to three times more spores per day than strains found in USA and Europe before 2000, suggesting that increased aggressiveness at this level may accelerate global spread of crop pathogens.en_US
dc.rightsCopyrighted; all rights reserveden_US
dc.sourceMolecular Ecology;17,(2008) Pagination 3818,3826en_US
dc.subjectyellow rusten_US
dc.subjectstripe rusten_US
dc.subjectclonal evolutionen_US
dc.subjectlong‐distance dispersalen_US
dc.titleRapid global spread of two aggressive strains of a wheat rust fungusen_US
dc.typeJournal Articleen_US
cg.subject.agrovocpuccinia striiformisen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerAarhus University - AU-Denmarken_US
cg.contributor.centerUniversity of Arkansas - UARKen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
dc.identifier.statusTimeless limited accessen_US

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