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dispersal curves

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Out-crossing between genetically modified herbicide-tolerant and other winter oilseed rape cultivars
Euan Simpson, Neil McRoberts, Jeremy Sweet
Journal:

Plant Genetic Resources / Volume 4 / Issue 2 / August 2006

Published online by Cambridge University Press:

12 February 2007, pp. 96-107
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Out-crossing between genetically modified herbicide-tolerant (GMHT) and non-GM rape cultivars was studied using GMHT source field plots of approximately 0.8 ha. Levels of cross-pollination between adjacent fully fertile rape varieties declined rapidly with increasing distance from the interface between plots. A varietal association with low levels of male sterility showed higher levels of out-crossing than other varieties. Out-crossing data were used to compare negative exponential and inverse power-law models for their fit to describe the observed relationship between cross-pollination and distance from source. Results showed that the inverse power-law model provided a better fit of the data.