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Conservation of the expression of Dll, en, and wg in the eye-antennal imaginal disc of stalk-eyed flies
- Source :
- Evolutiondevelopment. 3(6)
- Publication Year :
- 2002
-
Abstract
- We studied the developmental basis of exaggerated eye span in two species of stalk-eyed flies (Cyrtodiopsis dalmanni and Sphyracephala beccarri). These flies have eyes laterally displaced at the end of eyestalks, and males have greatly exaggerated eye span, which they use as a sexual display. To investigate eye span development we have compared eye-antennal disc morphology and the expression of three key regulator genes of Drosophila head development, Distal-less (Dll), engrailed (en), and wingless (wg), in the stalk-eyed flies and Drosophila. We found great similarity in the basic division of the disc into anterior-antennal and posterior-eye portions and in the general patterning of Dll, en, and wg. Unexpectedly, our results showed that although the eye and antenna are adjacent in adult stalk-eyed flies, their primordia are physically separated by the presence of an intervening region between the anterior and posterior portions of the disc. This region is absent from Drosophila eye-antennal discs. We chose two stalk-eyed fly species that differed in the degree of eye-stalk exaggeration but surprisingly we found no corresponding difference in the size of the en-wg expression domains that mark the boundaries of the dorsal head capsule primordia. In summary, our expression data establish the regional identity of the eye-antennal disc and provide a framework from which to address the developmental genetics of hypercephaly.
- Subjects :
- genetic structures
Gene Expression
Wnt1 Protein
Proto-Oncogene Proteins
Animals
Drosophila Proteins
Primordium
Drosophila
Ecology, Evolution, Behavior and Systematics
Antenna (biology)
Homeodomain Proteins
biology
Diptera
fungi
Anatomy
biology.organism_classification
eye diseases
engrailed
Imaginal disc
Developmental genetics
Organ Specificity
Sphyracephala
sense organs
Drosophila melanogaster
Developmental Biology
Transcription Factors
Subjects
Details
- ISSN :
- 1520541X
- Volume :
- 3
- Issue :
- 6
- Database :
- OpenAIRE
- Journal :
- Evolutiondevelopment
- Accession number :
- edsair.doi.dedup.....9365312b2148b5d87dfc9782536fbdff