Abstract
The genetic constitution of A and B incompatibility factors in five species of Pleurotus mushrooms was surveyed by linkage analysis. The B incompatibility factor recombinants from monospore isolates of P. citrinopileatus, P. cornucopiae, P. eryngii, P. ostreatus and P. sajor-caju were found. It was also demonstrated that the genetic distances between two subunits of the B incompatibility factor in these mushrooms, Bα and Bβ, were widely varied between 0 and 18.2 cM among the test strains. On the other hand, we could not isolate any A recombinants among about three hundred monospore isolates from either one of the six test strains of Pleurotus mushrooms. There was no linkage between the A and Bincompatibility factors in the test fungi as similar to various tetrapolar basidiomycetous mushrooms.
