Use of nystatin for random spore selection in the yeast Saccharomycopsis lipolytica

Nystatin was used to develop a new method to select spores of the yeast Saccharomycopsis lipolytica. At low concentrations nystatin killed preferently growing cells of this yeast. At high concentrations nongrowing cells were affected as well. In contrast, spores were not sensitive to nystatin action. This differential response to the antibiotic suggested its use to select spores from sporulated yeast cultures.