| Evolution of faster development does not lead to greater fluctuating asymmetry of sternopleural bristle number in Drosophila. | |
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MedLine Citation:
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PMID: 11910118 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Both strong directional selection and faster development are thought to destabilize development, giving rise to greater fluctuating asymmetry (FA), although there is no strong empirical evidence supporting this assertion. We compared FA in sternopleural bristle number in four populations of Drosophila melanogaster successfully selected for faster development from egg to adult, and in four control populations. The fraction of perfectly symmetric individuals was higher in the selected populations, whereas the FA levels did not differ significantly between selected and control populations, clearly indicating that directional selection for faster development has not led to increased FA in sternopleural bristle number in these populations. This may be because: (i) development time and FA are uncorrelated, (ii) faster development does result in FA, but selection has favoured developmentally stable individuals that can develop fast and still be symmetrical, or (iii) the increased fraction of symmetric individuals in the selected populations is an artifact of reduced body size. Although we cannot discriminate among these explanations, our results suggest that the relationship between development time, FA and fitness may be far more subtle than often thought. |
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Authors:
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M Shakarad; N G Prasad; M Rajamani; A Joshi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of genetics Volume: 80 ISSN: 0022-1333 ISO Abbreviation: J. Genet. Publication Date: 2001 Apr |
Date Detail:
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Created Date: 2002-03-22 Completed Date: 2002-09-10 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 2985113R Medline TA: J Genet Country: India |
Other Details:
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Languages: eng Pagination: 1-7 Citation Subset: IM |
Affiliation:
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Poornaprajna Institute of Scientific Research, 4 Sadashivanagar, Bangalore 560 080, India. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Drosophila melanogaster / anatomy & histology, embryology*, genetics Evolution* Selection, Genetic |
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