Aspergillus flavus resident in Kenya: high genetic diversity in an ancient population primarily shaped by clonal reproduction and mutation-driven evolution

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dc.creatorIslam, M.S.
dc.creatorCallicott, K.A.
dc.creatorMutegi, C.
dc.creatorBandyopadhyay, Ranajit
dc.creatorCotty, P.J.
dc.date2018-10
dc.date2018-11-01T10:47:04Z
dc.date2018-11-01T10:47:04Z
dc.date.accessioned2026-06-27T16:02:45Z
dc.descriptionAspergillus flavus has long been considered to be an asexual species. Although a sexual stage was recently reported for this species from in vitro studies, the amount of recombination ongoing in natural populations and the genetic distance across which meiosis occurs is largely unknown. In the current study, genetic diversity, reproduction and evolution of natural A. flavus populations endemic to Kenya were examined. A total of 2744 isolates recovered from 629 maize-field soils across southern Kenya in two consecutive seasons were characterized at 17 SSR loci, revealing high genetic diversity (9-72 alleles/locus and 2140 haplotypes). Clonal reproduction and persistence of clonal lineages predominated, with many identical haplotypes occurring in multiple soil samples and both seasons. Genetic analyses predicted three distinct lineages with linkage disequilibrium and evolutionary relationships among haplotypes within each lineage suggesting mutation-driven evolution followed by clonal reproduction. Low genetic differentiation among adjacent communities reflected frequent short distance dispersal.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/97855
dc.identifier.urihttp://hdl.handle.net/123456789/120920
dc.languageen
dc.publisherElsevier
dc.rightsOpen Access
dc.sourceIslam, M.S., Callicott, K.A., Mutegi, C., Bandyopadhyay, R. & Cotty, P.J. (2018). Aspergillus flavus resident in Kenya: high genetic diversity in an ancient population primarily shaped by clonal reproduction and mutation-driven evolution. Fungal Ecology, 35, 20-33.
dc.subjectaspergillus flavus
dc.subjectgenetic variation
dc.subjectreproduction
dc.subjectevolution
dc.subjectaflatoxins
dc.subjectsimple sequence repeat
dc.titleAspergillus flavus resident in Kenya: high genetic diversity in an ancient population primarily shaped by clonal reproduction and mutation-driven evolution
dc.typeJournal Article

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Instituto Internacional de Agricultura Tropical (IITA)