Genetic relationships among strains of the Aspergillus niger aggregate

L.M. Ferracin, Jens Christian Frisvad, M.H. Taniwaki, B.T. Iamanaka, D. Sartori, M.E. Schaoavaloff, M.H.P. Fungaro

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We analyzed the genetic relationships between 51 fungal isolates previously identified as A. niger aggregate, obtained from dried fruit samples from worldwide origin and 7 A. tubingensis obtained from Brazilian coffee beans samples. Greater fungal diversity was found in black sultanas. Aspergillus niger sensu stricto was the most prevalent species. It was found in all fruit substrates of all geographical origins. Based on Random Amplification of Polymorphic DNA (RAPD) and beta-tubulin sequences data two groups of A. niger were found. In spite of the small number of isolates from Group IV an association between extrolite patterns and molecular clustering is speculated. A. tubingensis were the second most frequent species and this species were clearly subdivided into two groups. The finding of two groups for A. tubingensis strains could not yet explain the contradictions found in the literature about the capability this species for ochratoxin production, because both of them were formed by only non-ochratoxin-producing strains.
    Original languageEnglish
    JournalBrazilian Archives of Biology and Technology
    Volume52
    Pages (from-to)241-248
    ISSN1516-8913
    Publication statusPublished - 2009

    Keywords

    • Aspergillus niger aggregate
    • ochratoxin A
    • toxigenic fungi
    • dried fruits

    Fingerprint Dive into the research topics of 'Genetic relationships among strains of the Aspergillus niger aggregate'. Together they form a unique fingerprint.

    Cite this