| An analytical model assessing the potential threat to natural habitats from insect resistance transgenes. | |
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MedLine Citation:
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PMID: 16096086 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We examine the role of ecological interactions on effective gene flow from genetically manipulated plants to their wild relatives. We do so by constructing and applying to oilseed rape (OSR) an analytical model for interaction between plants with and without an insect resistance (IR) allele in natural communities, incorporating documented levels of herbivore variability. We find that with reasonable values of advantage to the IR allele, little concomitant disadvantage (physiological costs of the allele) restricts it to low proportions of the natural population for large numbers of generations. We conclude that OSR IR transgenes are unlikely to pose an immediate threat to natural communities. Our model identifies those factors best able to regulate particular transgenes at the population level, the most effective being impaired viability of seeds in the period between production and the following growing season, although other possibilities exist. Because solutions rely on ratios, limiting values of regulating factors are testable under controlled conditions, minimizing risk of release into the environment and offering significant advancement on existing testing programmes. Our model addresses folivory but is easily modified for herbivory damaging the seed or directly affecting seed production by infested plants, or for pathogens altering seed survival in the seedbank. |
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Authors:
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Colleen K Kelly; Michael G Bowler; Felix Breden; Michael Fenner; Guy M Poppy |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Proceedings. Biological sciences / The Royal Society Volume: 272 ISSN: 0962-8452 ISO Abbreviation: Proc. Biol. Sci. Publication Date: 2005 Sep |
Date Detail:
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Created Date: 2005-08-12 Completed Date: 2006-01-20 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 101245157 Medline TA: Proc Biol Sci Country: England |
Other Details:
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Languages: eng Pagination: 1759-67 Citation Subset: IM |
Affiliation:
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School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton SO16 7PX, UK. colleen.kelly@zoo.ox.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brassica napus / genetics* Ecosystem* Environment* Genetics, Population* Models, Theoretical* Moths / growth & development Plants, Genetically Modified / genetics* Population Dynamics Seeds / genetics, physiology Transgenes / genetics |
| Comments/Corrections | |
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