Genetic mapping of blasticidin S-resistant gene, bls 2, was made by tetrad analysis in the yeast S, cerevisiae. The bls 2 locus was placed between met 1 and MAL 4 loci located on the right arm of chromosome XI. The map distances calculated with a equation by Perkins were 12.1cM from MAL 4 and 21.3cM from met 1.
