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Rapeseed cytoplasm gives advantage in wild relatives and complicates genetically modified crop biocontainment

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Allainguillaume, J., Harwood, T., Ford, C. S., Cuccato, G., Norris, C., Allender, Charlotte J., Welters, R., King, G. J. and Wilkinson, M. J. (2009) Rapeseed cytoplasm gives advantage in wild relatives and complicates genetically modified crop biocontainment. New Phytologist, Vol.183 (No.4). pp. 1201-1211. doi:10.1111/j.1469-8137.2009.02877.x

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Official URL: http://dx.doi.org/10.1111/j.1469-8137.2009.02877.x

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Abstract

Biocontainment methods for genetically modified crops closest to commercial reality (chloroplast transformation, male sterility) would be compromised (in absolute terms) by seed-mediated gene flow leading to chloroplast capture. Even in these circumstances, however, it can be argued that biocontainment still represses transgene movement, with the efficacy depending on the relative frequency of seed-and pollen-mediated gene flow.

In this study, we screened for crop-specific chloroplast markers from rapeseed (Brassica napus) amongst sympatric and allopatric populations of wild B. oleracea in natural cliff-top populations and B. rapa in riverside and weedy populations.

We found only modest crop chloroplast presence in wild B. oleracea and in weedy B. rapa, but a surprisingly high incidence in sympatric (but not in allopatric) riverside B. rapa populations. Chloroplast inheritance models indicate that elevated crop chloroplast acquisition is best explained if crop cytoplasm confers selective advantage in riverside B. rapa populations.

Our results therefore imply that chloroplast transformation may slow transgene recruitment in two settings, but actually accelerate transgene spread in a third. This finding suggests that the appropriateness of chloroplast transformation for biocontainment policy depends on both context and geographical location.

Item Type: Journal Article
Subjects: Q Science > Q Science (General)
Divisions: Faculty of Science > Life Sciences (2010- ) > Warwick HRI (2004-2010)
Journal or Publication Title: New Phytologist
Publisher: Wiley-Blackwell Publishing Ltd.
ISSN: 0028-646X
Official Date: 2009
Dates:
DateEvent
2009Published
Volume: Vol.183
Number: No.4
Number of Pages: 11
Page Range: pp. 1201-1211
DOI: 10.1111/j.1469-8137.2009.02877.x
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC), Natural Environment Research Council

Data sourced from Thomson Reuters' Web of Knowledge

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