title: A high frequency of male determining factors in male Musca domestica (Diptera: Muscidae) from Ipswich, Australia.
abstract: The male sex determining factor (M) in the house fly is linked to the Y chromosome in the ancestral condition, but can also be linked to another chromosome (I-V or X). However, descriptions of the linkage and frequency of M factors in different populations throughout the world are vastly incomplete. We collected house flies from a dairy in Ipswich, Australia, and determined that M was linked to chromosomes II, III, IV, and Y. Most males (69.8%) were homozygous for M on autosome II and/or III, and 92.3% of the males had multiple M factors. In all, there were 13 different male genotypes found. The high frequency of M, the presence of M on four different linkage groups, and the large number of male genotypes found in this population make it unique relative to other populations of house flies that have been examined.
authors.affiliation: Department of Entomology, Comstock Hall, Cornell University, Ithaca, NY 14853, USA.
authors.forename: R L
authors.initials: RL
authors.lastname: Hamm
authors.forename: J G
authors.initials: JG
authors.lastname: Scott
mesh_terms: D000818:Animals; D001315:Australia; D008040:Genetic Linkage; D005838:Genotype; D006793:Houseflies / Q000235:genetics*; D008297:Male; D019849:Sex Determination Processes; D014998:Y Chromosome