Landscape gene flow, coexistence and threshold effect: The case of genetically modified herbicide tolerant oilseed rape (Brassica napus)

M. Graziano Ceddia, Mark Bartlett and Charles Perrings

Ecological Modelling, 2007, vol. 205, issue 1, 169-180

Abstract: Globally there have been a number of concerns about the development of genetically modified crops many of which relate to the implications of gene flow at various levels. In Europe these concerns have led the European Union (EU) to promote the concept of ‘coexistence’ to allow the freedom to plant conventional and genetically modified (GM) varieties but to minimise the presence of transgenic material within conventional crops. Should a premium for non-GM varieties emerge on the market, the presence of transgenes would generate a ‘negative externality’ to conventional growers. The establishment of maximum tolerance level for the adventitious presence of GM material in conventional crops produces a threshold effect in the external costs.

Keywords: Gene flow; Coexistence; Threshold effect; Spatial aggregation; Oilseed rape (B. napus) (search for similar items in EconPapers)
Date: 2007
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Citations: View citations in EconPapers (12)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:ecomod:v:205:y:2007:i:1:p:169-180

DOI: 10.1016/j.ecolmodel.2007.02.025

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