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Molecular Biology and Evolution, Vol 2, 141-149, Copyright © 1985 by Society for Molecular Biology and Evolution

ORIGINAL ARTICLE

Coevolution of the glucose dehydrogenase gene and the ejaculatory duct in the genus Drosophila

DR Cavener
Department of Molecular Biology, Vanderbilt University, Nashville, Tennessee 37235.

The glucose dehydrogenase gene (Gld) in Drosophila melanogaster exhibits a unique spatial and temporal pattern of expression. GLD expression switches from a non-sex-limited state at the pupal stage to a male-limited state at the adult stage. At the adult stage, the enzyme is restricted to the ejaculatory duct. Within the genus Drosophila, the ejaculatory duct has undergone a simple morphological divergence. In order to determine whether correlated changes in GLD expression had occurred, GLD activity during the pupal and adult stages was determined for several Drosophila species. It was found that virtually all of the species exhibit pupal GLD activity, whereas only those species with an expanded ejaculatory duct express male-limited GLD. The results of interspecific genital imaginal disc transplantation experiments indicate that the expanded morphology and GLD expression do not require any species- or sex-specific diffusible factors. An apparent regulatory polymorphism exists within the D. takahashii species with respect to male-limited GLD expression.
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This article has been cited by other articles:


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B. L. Keplinger, X. Guo, J. Quine, Y. Feng, and D. R. Cavener
Complex Organization of Promoter and Enhancer Elements Regulate the Tissue- and Developmental Stage-Specific Expression of the Drosophila melanogaster Gld Gene
Genetics, February 1, 2001; 157(2): 699 - 716.
[Abstract] [Full Text]


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