Respiratory Competence in the Diagnosis of Gene-Controlled Phenotypes in Saccharomyces

Abstract
A funda-mental ambiguity prevails in certain genetical analyses of the inheritance of slow fermentation, adenine-synthesis, and pigmentation. This ambiguity arises from the absence of information concerning the respiratory competence of hybrids and segregants. Routine tests of segregants for their respiratory phenotypes are an essential complement to any genetical analysis, regardless of the respiratory competence of the parents.