Mating configurations inSchizosaccharomyces pombestrains of different geographical origins

摘要

In genetic research withSchizosaccharomyces pombethe strains used are almost exclusively descendants of the clones originally isolated by Leupold. In the “standard” homothallic (h90) strain three closely linked mating-type (MT) genes are present in the MT region: the actual MT locus,mat1, and two silent cassettes,mat2andmat3, respectively. Various rearrangements are known in the MT region, e.g., heterothallich+orh-strains arise by duplications or deletions. In the present paper we analysed the mating behavior and the configurations of the MT regions of 19S. pombeisolates from different parts of the world. In comparison with the Leupold strains several new MT configurations were fo