酵母の銅耐性の遺伝〔英文〕

概要

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Copper resistant strains were obtained by training haploid strains of Saccharomyces cerevisiaethrough repeated subcultures in copper-containing media. Tetrad analysis made after mating one of those resistant strains by a sensitive haploid revealed that the resistance was controlled by a dominant gene which segregated independent of mating type, galactose fermentability and growth type.From a copper culture of a sensitive diploid strain, resistant clones having a genotype Rr and those having a lower level of resistance were obtained. The genotype of the latter was such as representable by Rr. By genetical analyses of resistant cells isolated from a copper culture inoculated by Rr cells, it was conjectured that R, R and r are multiple alleles, and that the mutation rate from R to R is much higher than that from r to R and from r to R.
日本遺伝学会の論文