Distribution and incidence of atoxigenic Aspergillus flavus VCG in tree crop orchards in California: a strategy for identifying potential antagonists, the example of almonds

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cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationUniversity of Californiaen
cg.contributor.affiliationInternational Institute of Tropical Agricultureen
cg.contributor.crpForests, Trees and Agroforestry
cg.contributor.donorUnited States Department of Agricultureen
cg.coverage.countryUnited States
cg.coverage.iso3166-alpha2US
cg.coverage.regionACP
cg.coverage.regionNorthern America
cg.creator.identifierAlejandro Ortega-Beltran: 0000-0003-3747-8094
cg.howPublishedFormally Publisheden
cg.identifier.doihttps://doi.org/10.1016/j.ijfoodmicro.2017.10.023en
cg.identifier.iitathemePLANT PRODUCTION & HEALTH
cg.isijournalISI Journalen
cg.issn0168-1605en
cg.journalInternational Journal of Food Microbiologyen
cg.reviewStatusPeer Reviewen
cg.subject.iitaAFLATOXINen
cg.subject.iitaDISEASE CONTROLen
cg.subject.iitaPLANT HEALTHen
cg.subject.iitaPLANT PRODUCTIONen
cg.volume265en
dc.contributor.authorPicot, A.en
dc.contributor.authorDoster, M.en
dc.contributor.authorIslam, M.en
dc.contributor.authorCallicott, K.en
dc.contributor.authorOrtega Beltran, A.en
dc.contributor.authorCotty, P.J.en
dc.contributor.authorMichailides, T.en
dc.date.accessioned2018-07-13T10:28:19Zen
dc.date.available2018-07-13T10:28:19Zen
dc.identifier.urihttps://hdl.handle.net/10568/96133
dc.titleDistribution and incidence of atoxigenic Aspergillus flavus VCG in tree crop orchards in California: a strategy for identifying potential antagonists, the example of almondsen
dcterms.abstractTo identify predominant isolates for potential use as biocontrol agents, Aspergillus flavus isolates collected from soils of almond, pistachio and fig orchard in the Central Valley of California were tested for their membership to 16 atoxigenic vegetative compatibility groups (VCGs), including YV36, the VCG to which AF36, an atoxigenic isolate commercialized in the United States as biopesticide, belongs. A surprisingly large proportion of isolates belonged to YV36 (13.3%, 7.2% and 6.6% of the total almond, pistachio and fig populations, respectively), while the percentage of isolates belonging to the other 15 VCGs ranged from 0% to 2.3%. In order to gain a better insight into the structure and diversity of atoxigenic A. flavus populations and to further identify predominant isolates, seventeen SSR markers were then used to genetically characterize AF36, the 15 type-isolates of the VCGs and 342 atoxigenic isolates of the almond population. There was considerable genetic diversity among isolates with a lack of differentiation among micro-geographical regions or years. Since isolates sharing identical SSR profiles from distinct orchards were rare, we separated them into groups of at least 3 closely-related isolates from distinct orchards that shared identical alleles for at least 15 out of the 17 loci. This led to the identification of 15 groups comprising up to 24 closely-related isolates. The group which contained the largest number of isolates were members of YV36 while five groups were also found to be members of our studied atoxigenic VCGs. These results suggest that these 15 groups, and AF36 in particular, are well adapted to various environmental conditions in California and to tree crops and, as such, are good candidates for use as biocontrol agents.en
dcterms.accessRightsLimited Access
dcterms.audienceScientistsen
dcterms.available2017-10-21
dcterms.bibliographicCitationPicot, A., Doster, M., Islam, M.S., Callicott, K., Ortega-Beltran, A., Cotty, P. & Michailides, T. (2018). Distribution and incidence of atoxigenic Aspergillus flavus VCG in tree crop orchards in California: A strategy for identifying potential antagonists, the example of almonds. International Journal of Food Microbiology, 265, 55-64.en
dcterms.extent55-64en
dcterms.issued2018-01
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherElsevieren
dcterms.subjectaspergillus flavusen
dcterms.subjectaflatoxinsen
dcterms.subjectbiocontrolen
dcterms.subjecttree cropsen
dcterms.subjectalmondsen
dcterms.typeJournal Article

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