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Out-crossing between genetically modified herbicide-tolerant and other winter oilseed rape cultivars

Published online by Cambridge University Press:  12 February 2007

Euan Simpson
NIAB, Huntingdon Road, Cambridge CB3 0LE, UK
Neil McRoberts
Scottish Agricultural College, Auchincruive, Ayr, KA6 5HW, UK
Jeremy Sweet*
NIAB, Huntingdon Road, Cambridge CB3 0LE, UK
*Corresponding author: E-mail:


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.

Research Article
Copyright © NIAB 2006

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Bilsborrow, PE, Evans, EJ, Bowman, J and Bland, BF (1998) Contamination of edible double low oilseed rape crops via pollen transfer from high erucic cultivars. Journal of the Science of Food and Agriculture 76, 1722.3.0.CO;2-9>CrossRefGoogle Scholar
Colbach, N, Meynard, JM, Clermont-Dauphin, C and Messean, A (1999) GeneSys: a model; of the effects of cropping system on gene flow from transgenic rapeseed. BCPC Symposium Proceedings 72, 8994.Google Scholar
Cresswell, JE, Bassom, AP, Bell, SA, Collins, SJ and Kelly, TB (1995) Predicted pollen dispersal by honey bees and three species of bumble bee foraging on oilseed rape: a comparison of three models. Functional Ecology 9, 829841.CrossRefGoogle Scholar
Eastham, K and Sweet, JB (2002) Genetically Modified Organisms: The Significance of Gene Flow Through Pollen Transfer. European Environment Agency, Environmental Issue Report 28Office for Official Publications of the European Communities.Google Scholar
Fitt, BDL and McCartney, HA (1986) Spore dispersal in relation to epidemic models, In: Leonard, KJ, Fry, WE (eds) Plant Disease Epidemiology, Vol. 1. Population Dynamics and Management. New York: Macmillan, pp. 311345.Google Scholar
Gliddon, CJ (1999) Gene flow and risk assessment. BCPC Symposium Proceedings 72, 4956.Google Scholar
Gregory, PH (1968) Interpreting plant disease dispersal gradients. Annual Review of Phytopathology 6, 189212.CrossRefGoogle Scholar
Kareiva, P, Morris, W and Jacobi, CM (1994) Studying and managing risk of cross fertilisation between transgenic crops and wild relatives. Molecular Ecology 3, 1521.CrossRefGoogle Scholar
Lavigne, C, Klein, EK, Vallee, P, Pierre, J, Godelle, B and Renard, M (1998) A pollen dispersal experiment with transgenic oilseed rape. Estimation of the average pollen dispersal of an individual plant within a field. Theoretical and Applied Genetics 96, 886896.CrossRefGoogle Scholar
McCartney, HA and Bainbridge, A (1984) Deposition gradients close to a point source. Phytopathology 109, 219236.CrossRefGoogle Scholar
McCartney, HA and Lacey, ME (1991) Wind dispersal of pollen from crops of oilseed rape ( Brassica napus L.). Journal of Aerosol Science 22, 467477.CrossRefGoogle Scholar
Norris, C and Sweet, JB (2002) Monitoring Large Scale Releases of Genetically Modified Plants, Incorporating Report of Project EPG 1/5/30, Monitoring Releases of Genetically Modified Plants. DETR Report EPG 1/5/84LondonDETR.Google Scholar
Ramsay, G, Thompson, CE and Squire, GR (2003) Quantifying Landscape-scale Gene Flow in Oilseed Rape.DEFRA Final Report RG0216.London:DEFRA, Scholar
Raynor, JGS, Hayes, JV and Ogden, EC (1974) Mesoscale transport and dispersion of airborne pollens. Journal of Applied Meteorology 13, 8795.2.0.CO;2>CrossRefGoogle Scholar
Scheffler, JA, Parkinson, R and Dale, PJ (1993) Frequency and distance of pollen dispersal from transgenic oilseed rape ( Brassica napus ). Transgenic Research 2, 356364.CrossRefGoogle Scholar
Scheffler, JA, Parkinson, R and Dale, PJ (1995) Evaluating the effectiveness of isolation distances for field plots of oilseed rape ( Brassica napus ) using a herbicide resistance transgene as a selectable marker. Plant Breeding 114, 317321.CrossRefGoogle Scholar
Simpson, E and Sweet, JB (2002) Consequence Analysis of Herbicide Tolerant Oilseed Rape. DEFRA Report RG0217LondonDEFRA.Google Scholar
Simpson, EC, Norris, CE, Law, JR, Thomas, JE and Sweet, JB (1999) Gene flow in genetically modified herbicide tolerant oilseed rape ( Brassica napus ) in the UK. BCPC Symposium Proceedings 72, 7581.Google Scholar
Squire, GR, Burn, D and Crawford, JW (1997) A model for the impact of herbicide tolerance on the performance of oilseed rape as a volunteer weed. Annals of Applied Biology 131, 315338.CrossRefGoogle Scholar
Sweet, JB, Simpson, E, Law, J, Lutman, PJ, Berry, K, Payne, R, Champion, G, May, M, Walker, K, Wightman, P and Lainsbury, M (2004) Botanical and Rotational Implications of Genetically Modified Herbicide Tolerance in Winter Oilseed Rape and Sugar Beet (BRIGHT Project). HGCA Project Report 353, Scholar
Sylvester-Bradley, R and Makepeace, RJ (1984) A code for stages of development in oilseed rape (Brassica napus L.) In: Agronomy, Physiology, Plant Breeding and Crop Protection of Oilseed Rape. Aspects of Applied Biology 6. The Association of Applied Biologists 399 – 419.Google Scholar
Thompson, CE, Squire, G, Mackay, GR, Bradshaw, JE, Crawford, J and Ramsay, G (1999) Regional patterns of gene flow and its consequences for GM oilseed rape. BCPC Symposium Proceedings 72, 95100.Google Scholar
Timmons, AM, O'Brien, ET, Charters, YM, Dubbels, SJ and Wilkinson, MJ (1995) Assessing the risks of wind pollination from fields of genetically modified Brassica napus ssp. oleifera. Euphytica 85, 417423.CrossRefGoogle Scholar
Williams, IH (1987) The effect of insect pollination on plant development and seed production in winter oilseed rape ( Brassica napus L.). Journal of Agricultural Science 109, 135139.CrossRefGoogle Scholar