Fitness of hybrids between rapeseed (Brassica napus) and wild Brassica rapa in natural habitats

Allainguillaume, J.; Alexander, M.; Bullock, J. M.; Saunders, M.; Allender, C. J.; King, G.; Ford, C. S.; Wilkinson, M. J.. 2006 Fitness of hybrids between rapeseed (Brassica napus) and wild Brassica rapa in natural habitats. Molecular Ecology, 15. 1175-1184. 10.1111/j.1365-294X.2006.02856.x

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Fitness of hybrids between genetically modified (GM) crops and wild relatives influences the likelihood of ecological harm. We measured fitness components in spontaneous (non-GM) rapeseed × Brassica rapa hybrids in natural populations. The F1 hybrids yielded 46.9% seed output of B. rapa, were 16.9% as effective as males on B. rapa and exhibited increased self-pollination. Assuming 100% GM rapeseed cultivation, we conservatively predict < 7000 second-generation transgenic hybrids annually in the United Kingdom (i.e. 20% of F1 hybrids). Conversely, whilst reduced hybrid fitness improves feasibility of bio-containment, stage projection matrices suggests broad scope for some transgenes to offset this effect by enhancing fitness

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1111/j.1365-294X.2006.02856.x
Programmes: CEH Programmes pre-2009 publications > Biodiversity
CEH Sections: _ Population & Conservation Ecology
ISSN: 0962-1083
Format Availability: Electronic, Print
Additional Keywords: Brassica napus, Brassica rapa, fitness, gene flow, genetically modified crops, wild relatives
NORA Subject Terms: Botany
Ecology and Environment
Date made live: 03 Jul 2007 13:21

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