Date of this Version
J Phytopathol 159:69–71 (2011). DOI: 10.1111/j.1439-0434.2010.01718.x
Armillaria isolates were collected from a unique forest ecosystem in the Niobrara Valley Preserve in Nebraska, USA, which comprises a glacial and early postglacial refugium in the central plains of North America. The isolates were collected from diverse forest trees representing a unique mixture of forest types. Combined methods of rDNA sequencing and flow cytometric measurements of nuclear DNA content determined that all Armillaria isolates collected from the site were A. gallica.