The urochloa foliar blight and collar rot pathogen rhizoctonia solani AG-1 IA emerged in South America via a host shift from rice

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.creatorChavarro Mesa, Edisson [UNESP]
dc.creatorCeresini, Paulo C. [UNESP]
dc.creatorRamos Molina, Lina M. [UNESP]
dc.creatorPereira, Danilo A. S. [UNESP]
dc.creatorSchurt, Daniel A.
dc.creatorVieira, José R.
dc.creatorPoloni, Nadia M. [UNESP]
dc.creatorMcDonald, Bruce A.
dc.date2015-12-07T15:39:43Z
dc.date2015-12-07T15:39:43Z
dc.date2015-10-22
dc.date.accessioned2023-09-12T07:38:55Z
dc.date.available2023-09-12T07:38:55Z
dc.identifierhttp://dx.doi.org/10.1094/PHYTO-04-15-0093-R
dc.identifierPhytopathology, v. 105, n. 11, p. 1475-1486, 2015.
dc.identifier0031-949X
dc.identifierhttp://hdl.handle.net/11449/131659
dc.identifier10.1094/PHYTO-04-15-0093-R
dc.identifier26222889
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8780938
dc.descriptionThe fungus Rhizoctonia solani anastomosis group (AG)-1 IA emerged in the early 1990s as an important pathogen causing foliar blight and collar rot on pastures of the genus Urochloa (signalgrass) in South America. We tested the hypothesis that this pathogen emerged following a host shift or jump as a result of geographical overlapping of host species. The genetic structure of host and regional populations of R. solani AG-1 IA infecting signalgrass, rice, and soybean in Colombia and Brazil was analyzed using nine microsatellite loci in 350 isolates to measure population differentiation and infer the pathogen reproductive system. Phylogeographical analyses based on the microsatellite loci and on three DNA sequence loci were used to infer historical migration patterns and test hypotheses about the origin of the current pathogen populations. Cross pathogenicity assays were conducted to measure the degree of host specialization in populations sampled from different hosts. The combined analyses indicate that the pathogen populations currently infecting Urochloa in Colombia and Brazil most likely originated from a population that originally infected rice. R. solani AG-1 IA populations infecting Urochloa exhibit a mixed reproductive system including both sexual reproduction and long-distance dispersal of adapted clones, most likely on infected seed. The pathogen population on Urochloa has a genetic structure consistent with a high evolutionary potential and showed evidence for host specialization.
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionUNESP University of São Paulo State, Jaboticabal Campus, SP, Brazil
dc.descriptionUNESP, Ilha Solteira Campus, SP, Brazil
dc.descriptionEMBRAPA Brazilian Agricultural Research Corporation, Boa Vista, RR, Brazil
dc.descriptionEMBRAPA, Porto Velho, RO, Brazil
dc.descriptionInstitute of Integrative Biology, ETH Zurich, Switzerland
dc.descriptionUNESP University of São Paulo State, Jaboticabal Campus, SP, Brazil
dc.descriptionUNESP, Ilha Solteira Campus, SP, Brazil
dc.descriptionFAPESP: 2011/50150-3
dc.descriptionCNPq: 308394/2009-7
dc.descriptionCNPq: 307361/2012-8
dc.descriptionCNPq: 481756/2010-8
dc.descriptionCNPq: 485244/2012-8
dc.descriptionCNPq: 454543/2013-1
dc.descriptionFAPESP: 2011/23050-8
dc.descriptionCNPq: 140564/2009-8
dc.descriptionFAPESP: 2013/11944-0
dc.descriptionCNPq: 376421/2012-6
dc.descriptionCNPq: 117888/2013-3
dc.descriptionCNPq: 163835/2012-8
dc.descriptionCNPq: 370186/2015-0
dc.format1475-1486
dc.languageeng
dc.publisherThe American Phytopathological Society
dc.relationPhytopathology
dc.relation3.036
dc.rightsAcesso aberto
dc.sourcePubMed
dc.subjectGene flow
dc.subjectPathogen emergence
dc.subjectPathogen origins
dc.titleThe urochloa foliar blight and collar rot pathogen rhizoctonia solani AG-1 IA emerged in South America via a host shift from rice
dc.typeArtigo


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