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Genotypic Diversity Of Armillaria Gallica From Mixed Oak Forests In Massachusetts, Nicholas J. Brazee, Robert C. Marra, Robert L. Wick
Genotypic Diversity Of Armillaria Gallica From Mixed Oak Forests In Massachusetts, Nicholas J. Brazee, Robert C. Marra, Robert L. Wick
Robert L. Wick
The population structure of Armillaria gallica, an important pathogen of Quercus spp., was investigated from mixed oak forests in central Massachusetts, encompassing a sampling area over 500 km2. From 16 plots at four sites a total of 153 isolates (34–40 isolates per site) was analyzed with amplified fragment length polymorphisms (AFLPs). Analyses of 204 polymorphic loci detected 38 AFLP genotypes from a sample area of 4.51 hectares (ha). Genets ranged in distribution from five to 33 genets per hectare (GPH), with a mean of eight GPH and the average A. gallica genet occupying 0.13 ha. Allele frequencies produced an unbiased …