Abstract
Drosophila planitibia and Drosophila silvestris form a species pair that is an example of species diverged through a founder event. These species exhibit asymmetric sexual isolation, courtships between D. planitibia males and D. silvestris females being more successful than courtships between D. silvestris males and D. planitibia females. When analyzing the signal-response courtship sequence in these species, we found that D. silvestris females responded to male circling by standing or preening while D. planitibia females required further signals from the male to stop walking. The main reason for the reduced mating success rate of D. silvestris males with D. planitibia females was that the females responded to male circling by walking and the males did not proceed to the head-under-wings (HUW) position of a walking female. Another critical phase in these courtships was the HUW position in D. silvestris, where males proceeded almost immediately to wing and leg vibration. The courtships between D. planitibia male and D. silvestris female proceeded in a signal-response coordination until the male went to the HUW position, where he fanned his wings for too long a period before proceeding to wing and leg vibration. Thus, it seems that the asymmetric isolation between D. planitibia (ancestral species) and D. silvestris (derived species) is mainly due to a loss of transitions in the signal-response chain of D. silvestris. A change in the behavior of the males in the HUW position has caused further isolation between the species in both directions.
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- Arita K., Nii S. Effect of culture temperature on the production of Marek's disease virus antigens in a chicken lymphoblastoid cell line. Biken J. 1979 Mar;22(1):31–34. [PubMed] [Google Scholar]
- Carson H. L., Bryant P. J. Change in a secondary sexual character as evidence of incipient speciation in Drosophila silvestris. Proc Natl Acad Sci U S A. 1979 Apr;76(4):1929–1932. doi: 10.1073/pnas.76.4.1929. [DOI] [PMC free article] [PubMed] [Google Scholar]
- DeSalle R., Giddings L. V. Discordance of nuclear and mitochondrial DNA phylogenies in Hawaiian Drosophila. Proc Natl Acad Sci U S A. 1986 Sep;83(18):6902–6906. doi: 10.1073/pnas.83.18.6902. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hoy R. R., Hoikkala A., Kaneshiro K. Hawaiian courtship songs: evolutionary innovation in communication signals of Drosophila. Science. 1988 Apr 8;240(4849):217–219. doi: 10.1126/science.3127882. [DOI] [PubMed] [Google Scholar]
- Lande R. Models of speciation by sexual selection on polygenic traits. Proc Natl Acad Sci U S A. 1981 Jun;78(6):3721–3725. doi: 10.1073/pnas.78.6.3721. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Stalker H D. Sexual Isolation Studies in the Species Complex Drosophila Virilis. Genetics. 1942 Mar;27(2):238–257. doi: 10.1093/genetics/27.2.238. [DOI] [PMC free article] [PubMed] [Google Scholar]