Apparently Aberrant Segregation of Nutritional Markers in Aspergillus nidulans

Publisher Website
Google Scholar
Abstract
Analysis of sexual and parasexual crosses in Aspergillus nidulans indicates that for specific nutritional markers the recovery ratio of wild-type to auxotrophic alleles is a function of the composition of the recovery medium. Recovery of prototrophic alleles for some markers was in excess when ascospores or diploid conidia were plated on unsupplemented complex recovery media. Certain levels of supplementation with the growth requirements of one of the markers restored the segregation ratio to the expected for that marker, often at the expense of recovery of alleles of previously normally segregating markers. The effect of supplementation appeared to be highly allele specific.