Six newly developed microsatellite markers of <Emphasis Type="Italic">Laccaria amethystina</Emphasis>, using an improved CSSR approach

Microsatellite markers were established by an improved combined simple sequence repeat (CSSR) approach for the ectomycorrhizal basidiomycete Laccaria amethystina. Six markers delivered codominant polymorphic results, with up to six different alleles. They were tested with DNA originating from sporocarps and ectomycorrhizal root tips from silver fir (Abies alba), collected in the northern Black Forest. Sporocarps and ectoymcorrhizae exhibited similar allelic profiles, without any distorting influence of the host tree species. Results were compared to allelic profiles delivered by three published Asian markers. Allelic frequencies of the new markers showed a higher resolution of individuals within the population community, but partially a lower grade of heterozygosity. Possible reasons are discussed, and further questions addressed.