A Clarification of the Relationship of Candida Guilliermondii to Other Yeasts by a Study of Their Mating Types

reported that some yeasts clasffied in nonasco-sporogenous genera are haploid mating types. Ascospores are produced when sexually active strains of the opposite types are mixed together under conditions favoring sporulation. The object of the present paper is to illustrate the use of mating types as an aid in clarifying taxonomy of yeasts previously thought to be closely related, as well as showing identity of yeasts not previously known to be related. The group involved consists of Candida guilliermndii