RT Journal Article SR Electronic(1) A1 North, JaneYR 1982 T1 A Dominance Modifier for Cycloheximide Resistance in Coprinus cinereus JF Microbiology, VO 128 IS 11 SP 2747 OP 2753 DO https://doi.org/10.1099/00221287-128-11-2747 PB Microbiology Society, SN 1465-2080, AB Wild and laboratory strains of Coprinus cinereus show varying levels of sensitivity to cycloheximide (actidione). Mutants resistant to 1.0 g cycloheximide ml−1 were isolated from UV light-irradiated oidia of two strains unable to grow on more than 0·25 μg cycloheximide ml−1. Of 13 induced mutants, 12 fell into one complementation group, cy-2; mutants at this locus were usually recessive, but one of those isolated carried a dominance modifier gene, modcy +, which led to partial resistance in dikaryons heterozygous for cy-2 r. Modcy+ was dominant in dikaryons to its non-mutant allele modcy −, but it had no effect in diploids. However, it affected all cy-2 r alleles tested in dikaryons. Linkage data are presented for cy-2, modcy and another cycloheximide resistance gene, cy-1, which is found in wild strains., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-128-11-2747