dc.contributorUniversidade Federal de Lavras
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorEmpresa Brasileira de Pesquisa Agropecuária Centro Nacional de Pesquisa de Trigo
dc.date.accessioned2019-10-03T17:31:40Z
dc.date.accessioned2022-12-19T17:47:17Z
dc.date.available2019-10-03T17:31:40Z
dc.date.available2022-12-19T17:47:17Z
dc.date.created2019-10-03T17:31:40Z
dc.date.issued2019
dc.identifierActa Scientiarum. Agronomy. Editora da Universidade Estadual de Maringá - EDUEM, v. 41, p. -, 2019.
dc.identifier1807-8621
dc.identifierhttp://hdl.handle.net/11449/183795
dc.identifier10.4025/actasciagron.v41i1.39332
dc.identifierS1807-86212019000101003
dc.identifierS1807-86212019000101003.pdf
dc.identifier2635092058300854
dc.identifier0000-0003-2381-2792
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5364851
dc.description.abstractABSTRACT. Triazole fungicides have not been effective for managing the wheat blast disease in Brazil. A broad analysis across six geographical populations of Pyricularia graminis-tritici in central-southern Brazil indicated a high level of resistance to triazole fungicides. Since P. graminis-tritici is also associated with others poaceous species, here, we analyzed whether triazole-resistant isolates of the blast pathogen could be recovered from other poaceous hosts that are invasive of sprayed wheat fields. In addition to P. graminis-tritici (Pygt), we also evaluated the levels of sensitivity of three other grass-associated blast pathogens, which included P. grisea (Pg), P. pennisetigena (Pp), and P. urashimae (Pu). Resistance to the triazole fungicides tebuconazole and epoxiconazole was assessed phenotypically based on EC50 values and molecularly by analysis of the presence of mutations in the CYP51A gene, which encodes for the target enzyme 14-alpha-demethylase. We detected triazole-resistant Pyricularia spp. (Pg, Pp, Pu and Pygt) that is associated with Avena sativa, Cenchrus echinatus, Chloris distichophylla, Cynodon sp., Digitaria horizontalis, D. sanguinalis, Panicum maximum or Urochloa spp. The major outcome from our study was the evidence that invasive poaceous species from wheat fields could be an important source of triazole resistant fungal inoculum for the initial phases of the wheat blast epidemics.
dc.languageeng
dc.publisherEditora da Universidade Estadual de Maringá - EDUEM
dc.relationActa Scientiarum. Agronomy
dc.rightsAcesso aberto
dc.sourceSciELO
dc.subjectblast disease
dc.subjectCYP51A gene
dc.subjectsterol demethylation inhibitor (DMI) fungicides
dc.subjectepoxiconazole
dc.subjecttebuconazole
dc.titleResistance to triazole fungicides in Pyricularia species is associated with invasive plants from wheat fields in Brazil
dc.typeArtículos de revistas


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