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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. and Wilkinson, M. J. (2006) Fitness of hybrids between rapeseed (Brassica napus) and wild Brassica rapa in natural habitats. Molecular Ecology, 15 (4). pp. 1175-1184. ISSN 0962-1083

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To link to this item DOI: 10.1111/j.1365-294X.2006.02856.x

Abstract/Summary

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 x Brassica rapa hybrids in natural populations. The F-1 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. similar to 20% of F-1 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:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Biological Sciences
ID Code:10123
Uncontrolled Keywords:Brassica napus, Brassica rapa, fitness, gene flow, genetically modified, crops, wild relatives, GENETICALLY-MODIFIED CROPS, MODIFIED OILSEED RAPE, NATIONAL-SCALE, F-1, HYBRIDS, GENE FLOW, B-RAPA, HYBRIDIZATION, MICROSATELLITES, POPULATIONS, PERSPECTIVE

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