Genetic structure of species community of macromycetes of the genus Leccinum Gray (Basidiomycetes Boletaceae) of the right-bank Poles'ye

The biochemical gene marking of the macromycete community of the genus Lecc inum revealed nine reproductively isolated genetically differentiated forms instead of the two to five forms traditionally recognized in Poles'ye. Fro m 20 to 85% of the loci studied were found to have genetic distinctions and the degree of genetic variation did not always correlate with the morpholo gical features of the forms identified. The variation of the locus number w as found to be an important differentiating factor characteristic for this genus. In the group of L. scabrum s. I., every second locus was duplicated, whereas multiple isozymes were absent in L. aurantiacum s. I. An extremely high level of allozyme variation in macromycetes was found. The equilibriu m between the expected and observed genotypes in the fruit body samples was established and discussed. It was evidence of the fact that a panmictic mo del can be applied to the mushrooms of this genus, and that each fruit body is an individual organism.