ISOLATION AND CHARACTERIZATION OF COMPATIBLE DIPLOIDS OF SCHIZOPHYLLUM-COMMUNE

Common-AB diploids with several heterozygous biochemical markers were mated with appropriately marked haploid strains of S. commune in an effort to obtain compatible, common-A, and common-B diploid progeny with biochemical markers identical to those of the common-AB parent. The spores from these crosses were germinated on minimal medium. Five compatible diploids, but no common-A or common-B diploids, marked as desired, were isolated by this method. Two possessed some dikaryotic cells and 2 had many dikaryotic cells. One of the latter had peculiar behavior associated with 1 of its B mating-type factors.