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dc.contributor.authorOrtega-Beltran, A.
dc.contributor.authorCotty, P.J.
dc.date.accessioned2019-12-04T11:21:45Z
dc.date.available2019-12-04T11:21:45Z
dc.date.issued2018-03
dc.identifier.citationOrtega-Beltran, A. & Cotty, P.J. (2018). Frequent shifts in Aspergillus flavus populations associated with maize production in Sonora, Mexico. Phytopathology, 108(3), 412-420.
dc.identifier.issn0031-949X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3869
dc.description.abstractAspergillus flavus frequently contaminates maize, a critical staple for billions of people, with aflatoxins. Diversity among A. flavus L morphotype populations associated with maize in Sonora, Mexico was assessed and, in total, 869 isolates from 83 fields were placed into 136 vegetative compatibility groups (VCGs) using nitrate-nonutilizing mutants. VCG diversity indices did not differ in four agroecosystems (AES) but diversity significantly differed among years. Frequencies of certain VCGs changed manyfold over single years in both multiple fields and multiple AES. Certain VCGs were highly frequent (>1%) in 2006 but frequencies declined repeatedly in each of the two subsequent years. Other VCGs that had low frequencies in 2006 increased in 2007 and subsequently declined. None of the VCGs were consistently associated with any AES. Fourteen VCGs were considered dominant in at least a single year. However, frequencies often varied significantly among years. Only 9% of VCGs were detected all 3 years whereas 66% were detected in only 1 year. Results suggest that the most realistic measurements of both genetic diversity and the frequency of A. flavus VCGs are obtained by sampling multiple locations in multiple years. Single-season sampling in many locations should not be substituted for sampling over multiple years.
dc.description.sponsorshipUnited States Department of Agriculture
dc.format.extent412-420
dc.language.isoen
dc.subjectMaize
dc.subjectSoil Types
dc.subjectAflatoxins
dc.subjectAspergillus Flavus
dc.subjectVegetative Compatibility Analyses
dc.titleFrequent shifts in Aspergillus flavus populations associated with maize production in Sonora, Mexico
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.crpMaize
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationUniversity of Arizona
cg.coverage.regionAcp
cg.coverage.regionNorth America
cg.coverage.countryMexico
cg.creator.identifierAlejandro Ortega-Beltran: 0000-0003-3747-8094
cg.isijournalISI Journal
cg.authorship.typesCGIAR and advanced research institute
cg.iitasubjectAflatoxin
cg.iitasubjectMaize
cg.iitasubjectPlant Production
cg.iitasubjectSoil Information
cg.journalPhytopathology
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid96735
cg.targetaudienceScientists
cg.identifier.doihttps://dx.doi.org/10.1094/PHYTO-08-17-0281-R


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