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Assessment of transgene spread from oilseed rape by population dynamic and molecular analyses of feral oilseed rape

Assessment of transgene spread from oilseed rape by population dynamic and molecular analyses of feral oilseed rape

Journal of Plant Diseases and Protection: 39-47

ISSN/ISBN: 1861-3829

Oilseed rape (Brassica napus L.) has a certain potential to persist not only in arable fields but also in semi-natural habitats and is therefore often found on ruderal sites, along road verges and railroad tracks. In view of the future cultivation of genetically modified oilseed rape in Germany and of the possible spread of transgenes our objective was to investigate the origin and the persistence of feral oilseed rape plants. To this end, oilseed rape plants detected at 74 ruderal locations between 2001 and 2004 were characterized in a comparative way through molecular ISSR markers and biochemical seed content analysis. In addition, population dynamic parameters like seed production and seed germination were determined in order to estimate the reproduction potential of ruderal oilseed rape. The results of our survey show that chances for the formation of permanent ruderal populations are very low despite the high reproduction potential of feral oilseed rape on ruderal sites. Germination, seedling development and the formation of viable seeds are highly dependent on the type of soil surface, on competing vegetation, on the occurrence of herbivores and pathogens as well as on management measures.

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Accession: 066200110

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