Genes Governing the Fermentation of Maltose and Flocculation in a Brewer's Yeast. Paul L. Skatrud, Edward J. Kot, and J. R. Helbert, Miller Brewing Company, Milwaukee, WI 53201. J. Am. Soc. Brew. Chem. 40:0052, 1982.

The genetics of maltose fermentation and flocculation of a brewer's yeast were studied using diploid fusion hybrids obtained previously (11). Genetic analyses demonstrated that each fusion hybrid possessed one maltose gene, MAL1, which was the same in each hybrid. Flocculence segregated 4:0 in all fusion hybrids studied. Analyses revealed that hybrid F was homozygous for a single FLO gene, which mapped 41.8 centimorgans from ADE1 on chromosome 1. Tests for allelism identified this gene as FLO1.

Keywords: Brewer's yeast, Flocculence, Genetic analysis, Maltose fermentation, Spheroplast fusion.