Genetic structure of populations of Rhizoctonia solani anastomosis group-1 IA from soybean in Brazil
dc.contributor.author
Ciampi, Maisa B.
dc.contributor.author
Meyer, M.C.
dc.contributor.author
Costa, M.J.N.
dc.contributor.author
Zala, Marcelo
dc.contributor.author
McDonald, Bruce
dc.contributor.author
Ceresini, Paulo Cezar
dc.date.accessioned
2024-08-20T11:56:07Z
dc.date.available
2017-06-08T18:29:12Z
dc.date.available
2024-08-20T11:56:07Z
dc.date.issued
2008
dc.identifier.issn
0031-949X
dc.identifier.issn
1943-7684
dc.identifier.other
10.1094/PHYTO-98-8-0932
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/9269
dc.description.abstract
The Basidiomycete fungus Rhizoctonia solani anastomosis group (AG)-1 IA is a major pathogen of soybean in Brazil, where the average yield losses have reached 30 to 60% in some states in Northern Brazil. No information is currently available concerning levels of genetic diversity and population structure for this pathogen in Brazil. A total of 232 isolates of R. solani AG1 IA were collected from five soybean fields in the most important soybean production areas in central-western, northern, and northeastern Brazil. These isolates were genotyped using 10 microsatellite loci. Most of the multilocus genotypes (MLGTs) were site-specific, with few MLGTs shared among populations. Significant population subdivision was evident. High levels of admixture were observed for populations from Mato Grosso and Tocantins. After removing admixed genotypes, three out of five field populations (Maranhao, Mato Grosso, and Tocantins), were in Hardy-Weinberg (HW) equilibrium, consistent with sexual recombination. HW and gametic disequilibrium were found for the remaining soybean-infecting populations. The findings of low genotypic diversity, departures from HW equilibrium, gametic disequilibrium, and high degree of population subdivision in these R. solani AG-1 IA populations from Brazil are consistent with predominantly asexual reproduction, short-distance dispersal of vegetative propagules (mycelium or sclerotia), and limited long-distance dispersal, possibly via contaminated seed. None of the soybean-infecting populations showed a reduction in population size (bottleneck effect). We detected asymmetric historical migration among the soybean-infecting populations, which could explain the observed levels of subdivision.
en_US
dc.language.iso
en
en_US
dc.publisher
American Phytopathological Society
en_US
dc.title
Genetic structure of populations of Rhizoctonia solani anastomosis group-1 IA from soybean in Brazil
en_US
dc.type
Journal Article
dc.date.published
2008-07-11
ethz.journal.title
Phytopathology
ethz.journal.volume
98
en_US
ethz.journal.issue
8
en_US
ethz.pages.start
932
en_US
ethz.pages.end
941
en_US
ethz.identifier.wos
ethz.identifier.nebis
000052413
ethz.publication.place
Lancaster, PA
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02720 - Institut für Integrative Biologie / Institute of Integrative Biology::03516 - McDonald, Bruce / McDonald, Bruce
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02720 - Institut für Integrative Biologie / Institute of Integrative Biology::03516 - McDonald, Bruce / McDonald, Bruce
ethz.date.deposited
2017-06-08T18:29:34Z
ethz.source
ECIT
ethz.identifier.importid
imp59364bd75362172355
ethz.ecitpid
pub:20136
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2017-07-20T16:42:33Z
ethz.rosetta.lastUpdated
2021-02-14T05:09:38Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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