GENETIC-EVIDENCE OF A NEW FLOCCULATION SUPPRESSOR GENE IN SACCHAROMYCES-CEREVISIAE

The flocculation character in strain IM1-8b of Saccharomyces cerevisia e is controlled by a single and dominant gene shown to be allelic to F LO1. Such a gene has been both mitotically and meiotically mapped on t he right arm of chromosome I at 4.7 cM from PHO11. The phenotype was s uppressed by a single gene of wide distribution among non-flocculent s trains (proposed as fsu3) that, however, was unable to suppress other FLO1 genes in other flocculent strains.