Group Classification of Killer Yeasts Based on Cross-reactions between Strains of Different Species and Origin

Abstract

Summary: Strains of killer yeasts of various genera from a variety of sources were tested for their ability to kill each other, two neutral strains and four classes of mutants isolated as being resistant to killer toxin from a stock killer strain k12-1. The strains tested fell into four groups designated TOX1 to TOX4 according to their killing/immunity reaction with one another and their ability to kill the resistant mutants.