Mutations and Linkage Groups in Japanese Strains of the Housefly

Abstract

Fifteen visible mutants of the housefly have been isolated from Japanese populations and developed in marker strains suitable for genetic investigation. Although 6 linkage groups were to be expected from the known chromosome number, no sex-linked visible mutants were found, all the mutants being assignable to any of the 5 autosomal linkage groups. In one strain the characteristic w+ of the second chromosome behaved as if it were sex-limited. It was suggested that the Y-chromosome was occasionally translocated to the second chromosome.