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Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 02/02/2017
Data da última atualização: | 16/08/2022
Autoria: | ISAZA, R. E. A.; DIAZ-TRUJILLO, C.; DHILLON, B.; AERTS, A.; CARLIER, J.; CRANE, C. F.; JONG, T. V.; VRIES, I.; DIETRICH, R.; FARMER, A. D.; FERREIRA, C. F.; GARCIA, S.; GUZMAN, M.; HAMELIN, R. C.; LINDQUIST, E. A.; MEHRABI, R.; QUIROS, O.; SCHMUTZ, J.; SHAPIRO, H.; REYNOLDS, E.; SCALLIET, G.; SOUZA JUNIOR, M. T.; STERGIOPOULOS, I.; VAN DER LEE, T. A. J.; WIT, P. J. G. M. DE; ZAPATER, M.-F.; ZWIERS, L.-H.; GRIGORIEV, I. V.; GOODWIN, S. B.; KEMA, G. H. J.
Afiliação: | RAFAEL E. ARANGO ISAZA; CAUCASELLA DIAZ-TRUJILLO; BRAHAM DHILLON; ANDREA AERTS; JEAN CARLIER; CHARLES F. CRANE; TRISTAN V. DE JONG; INEKE DE VRIES; ROBERT DIETRICH; ANDREW D. FARMER; CLAUDIA FORTES FERREIRA, CNPMF; SUZANA GARCIA; MAURICIO GUZMAN; RICHARD C. HAMELIN; ERIKA A. LINDQUIST; RAHIM MEHRABI; OLMAN QUIROS; JEREMY SCHMUTZ; HARRIS SHAPIRO; ELIZABETH REYNOLDS; GABRIEL SCALLIET; MANOEL TEIXEIRA SOUZA JUNIOR, CNPAE; IOANNIS STERGIOPOULOS; THEO A. J. VAN DER LEE; PIERRE J. G. M. DE WIT; MARIE-FRANÇOISE ZAPATER; LUTE-HARM ZWIERS; IGOR V. GRIGORIEV; STEPHEN B. GOODWIN; GERT H. J. KEMA.
Título: | Combating a global threat to a clonal crop: banana black sigatoka pathogen Pseudocercospora fijiensis (Synonym Mycosphaerella fijiensis) genomes reveal clues for disease control.
Ano de publicação: | 2016
Fonte/Imprenta: | PLOS Genetics, v. 12, n.10, August, 2016.
ISSN: | 1553-7404
DOI: | 10.1371
Idioma: | Inglês
Conteúdo: | Black Sigatoka or black leaf streak disease, caused by the Dothideomycete fungus Pseudocercospora fijiensis (previously: Mycosphaerella fijiensis), is the most significant foliar disease of banana worldwide. Due to the lack of effective host resistance, management of this disease requires frequent fungicide applications, which greatly increase the economic and environmental costs to produce banana. Weekly applications in most banana plantations lead to rapid evolution of fungicide-resistant strains within populations causing disease-control failures throughout the world. Given its extremely high economic importance, two strains of P. fijiensis were sequenced and assembled with the aid of a new genetic linkage map. The 74-Mb genome of P. fijiensis is massively expanded by LTR retrotransposons, making it the largest genome within the Dothideomycetes. Melting-curve assays suggest that the genomes of two closely related members of the Sigatoka disease complex, P. eumusae and P. musae, also are expanded. Electrophoretic karyotyping and analyses of molecular markers in P. fijiensis field populations showed chromosome-length polymorphisms and high genetic diversity. Genetic differentiation was also detected using neutral markers, suggesting strong selection with limited gene flow at the studied geographic scale. Frequencies of fungicide resistance in fungicide-treated plantations were much higher than those in untreated wild-type P. fijiensis populations. A homologue of the Cladosporium fulvum Avr4 effector, PfAvr4, was identified in the P. fijiensis genome. Infiltration of the purified PfAVR4 protein into leaves of the resistant banana variety Calcutta 4 resulted in a hypersensitive-like response. This result suggests that Calcutta 4 could carry an unknown resistance gene recognizing PfAVR4. Besides adding to our understanding of the overall Dothideomycete genome structures, the P. fijiensis genome will aid in developing fungicide treatment schedules to combat this pathogen and in improving the efficiency of banana breeding programs.
Palavras-Chave: | Controle de pragas; Pseudocercospora fijiensis.
Thesagro: | Mycosphaerella Fijiensis.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
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