PMID: 9448291Mar 14, 1998Paper

Shifts in the life history of parasitic wasps correlate with pronounced alterations in early development

Proceedings of the National Academy of Sciences of the United States of America
Miodrag Grbić, M R Strand

Abstract

Developmental processes have been traditionally viewed to be invariant within higher taxa. However, examples are known whereby closely related species exhibit alterations in early embryogenesis yet appear very similar as adults. Such developmental changes are thought to occur in response to shifts in life history. In insects, the regulation of embryonic development has been intensively studied in model species like Drosophila melanogaster. Previous comparative studies suggest that the developmental processes documented in Drosophila well describe embryogenesis of advanced, holometabolous, insects generally. There have been few attempts, however, to take into account how life history has influenced early development of insects or to characterize early development of species with life histories fundamentally different from flies. Here we compared early development of two species from the same family of parasitic wasps that exhibit very different life histories. Bracon hebetor is an ectoparasite that lays large, yolky eggs on the integument of its host that develop much like the free-living honeybee and Drosophila. In contrast, Aphidius ervi is an endoparasite that lays small and apparently yolk-free eggs that develop in the hemoc...Continue Reading

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Citations

Sep 14, 2000·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·M Grbić
Jan 3, 2001·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·J D Evans, D E Wheeler
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