We have also compared the data from these 7 species with the sets of ABC transporters identified in two wood-degrading species of Boletales (Coniophora puteana and Serpula lacrymans [15]) representing the basal lineages within the order [21]. The numbers of ABC-protein encoding genes in the analysed mycorrhiza-forming species of Boletales range from 30 in B. edulis to 42 in P. tinctorius (Table 2 and Additional file 1; Additional file 2).