Genotypic diversity of Aspergillus parasiticus in an Illinois corn field.
Mcalpin, C.E., Wicklow, D.T. and Platis, C.E.
Plant Disease 82: 1132 – 1136.
1998
บทคัดย่อ
Aspergillus parasiticus was isolated from direct platings of soil from a corn field near Kilbourne, Illinois, USA. Sixty isolates of A. parasiticus, each from a separately collected soil sample, were examined for ability to produce sclerotia and aflatoxins and were subjected to DNA fingerprinting. Among 60 isolates analysed, 33 distinct DNA fingerprint groups were identified (each group sharing less than 80% pAF28 band similarity), including 50 distinct genotypes. Sclerotia were produced by 82% of the 50 A. parasiticus genotypes during dark incubation at 25oC. All isolates of A. parasiticus produced AFB1, B2 ,G1 and G2, whereas only 36% of the 31 A.flavus isolates from these soils produced aflatoxins.