Fig. 1. Selected nucleotide sites that are variable between ITS sequences of P. mairei and P. humilis and show additivities in the sequence of P.. banatica. Arrows indicate the variable sites, and numbers indicate positions of the sites in ITS 1 and ITS 2. Nucleotide sites in ITS 1 and ITS 2 are numbered separately from 5' to 3'. A, in ITS 1; B and C, in ITS 2.