Higher fitness and competitive advantage of Pyricularia oryzae Triticum lineage resistant to QoI fungicides

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Autor(es): dc.contributorUniversidade Federal de Lavras (UFLA)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorState Univ Tocantina Reg Maranhao-
Autor(es): dc.creatorDorigan, Adriano Francis-
Autor(es): dc.creatorMoreira, Silvino Intra-
Autor(es): dc.creatorCeresini, Paulo Cezar-
Autor(es): dc.creatorPozza, Edson Ampelio-
Autor(es): dc.creatorBelan, Leonidas Leoni-
Autor(es): dc.creatorSilveira, Patricia Ricardino da-
Autor(es): dc.creatorAlves, Eduardo-
Data de aceite: dc.date.accessioned2025-08-21T17:07:32Z-
Data de disponibilização: dc.date.available2025-08-21T17:07:32Z-
Data de envio: dc.date.issued2022-11-29-
Data de envio: dc.date.issued2022-11-29-
Data de envio: dc.date.issued2022-09-12-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1002/ps.7144-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/237967-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/237967-
Descrição: dc.descriptionBackground Quinone outside inhibitor (QoI) fungicides have not been effective in controlling the wheat blast disease [Pyricularia oryzae Triticum lineage (PoTl)] in Brazil. The first report of resistance of PoTl to QoIs in this country occurred in 2015. This study aimed to test hypotheses about the changes in fitness parameters and competitive advantage of the QoI-resistant (R) PoTl isolate group compared to the sensitive (S) isolate group. Mycelial growth on PDA medium and in vivo conidial production, incubation period and disease severity were analyzed as fitness parameters. The competitive ability was measured on wheat leaves and heads inoculated with mixtures of R:S isolates at the following proportions: 0S:100R, 20S:80R, 50S:50R, 80S:20R, 100S:0R, and 0S:0R. Results The QoI-R isolate group had significantly higher fitness than the sensitive isolate group, considering both in vitro and in vivo parameters. The highest in vivo conidial production on wheat leaves and the highest leaf and head disease severity were detected when resistant strains were predominant in the isolate's mixtures (20S:80R or 0S:100R proportions), in the absence of fungicide pressure. Conidia harvested from wheat blast lesions on leaves inoculated with 20S:80R and 0S:100R mixtures were resistant to QoIs in vitro assays based on discriminatory doses of the fungicide. Conclusion Therefore, QoI resistance facilitated a higher fitness and a competitive advantage in PoTl, which contrasts with the evolutionary theory that associates a fitness cost to fungicide resistance. We discuss the evolutionary and ecological implications of the higher fitness as found in the fungicide-resistant adapted populations of the wheat blast pathogen. (c) 2022 Society of Chemical Industry.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)-
Descrição: dc.descriptionNational Council for Scientific and Technological Development-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionUniv Fed Lavras, Dept Plant Pathol, Lavras, Brazil-
Descrição: dc.descriptionAgr Engn & Soils Sao Paulo State Univ, Dept Crop Protect, Sao Paulo, Brazil-
Descrição: dc.descriptionState Univ Tocantina Reg Maranhao, Ctr Agr Sci Campus Imperatriz, Sao Luis, Maranhao, Brazil-
Descrição: dc.descriptionAgr Engn & Soils Sao Paulo State Univ, Dept Crop Protect, Sao Paulo, Brazil-
Descrição: dc.descriptionFAPEMIG: CAG-APQ01975-15-
Descrição: dc.descriptionNational Council for Scientific and Technological Development: CNPq 305482/2017-3-
Descrição: dc.descriptionNational Council for Scientific and Technological Development: 432306133/2021-0-
Descrição: dc.descriptionNational Council for Scientific and Technological Development: 313825/2018-1-
Descrição: dc.descriptionFAPESP: Fapesp2018/21197-0-
Descrição: dc.descriptionFAPESP: Fapesp 2019/12509-1-
Formato: dc.format8-
Idioma: dc.languageen-
Publicador: dc.publisherWiley-Blackwell-
Relação: dc.relationPest Management Science-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectWheat blast-
Palavras-chave: dc.subjectQuinone outside inhibitor-
Palavras-chave: dc.subjectAzoxystrobin-
Palavras-chave: dc.subjectFungicide resistance-
Título: dc.titleHigher fitness and competitive advantage of Pyricularia oryzae Triticum lineage resistant to QoI fungicides-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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