The genetics of an isolating mechanism between two sibling species of Drosophila

  • Coyne J
  • 32


    Mendeley users who have this article in their library.
  • N/A


    Citations of this article.


Matings between Drosophila simulans females and males of the sibling species D. mauritiana are of abnormally short duration. These rapid matings interrupt the transfer of sperm, leading to substantial reproductive isolation in interspecific as compared to intraspecific copulations. Genetic analysis of this behavior shows that it is influenced much more by the male than the female genotype, with genes from D. simulans being dominant. In males, shortened copulation is caused by interspecific divergence at a minimum of three loci, with one gene on each of the major chromosomes. This is an underestimate of the true number of loci affecting the trait, which could be much larger. The two autosomes have the largest effect, whereas that of the X chromosome is much smaller. The genetic architecture of copulation duration and the larger effect of male than female genotype suggest that females can detect and discriminate against differences in male genitalia.

Author-supplied keywords

  • Copulation
  • Drosophila mauritiana
  • Drosophila simulans
  • Female
  • Genotype
  • Male
  • Reproductive isolation
  • analysis
  • autosomes
  • behavior
  • chromosome
  • chromosomes
  • discrimination
  • drosophila
  • duration
  • females
  • gene
  • genes
  • genetic
  • genetic analysis
  • genetics
  • genitalia
  • isolation
  • loci
  • male genitalia
  • males
  • mating
  • mating behavior
  • sibling species
  • species
  • sperm
  • transfer
  • x chromosome

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • J A Coyne

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free