Persistence of seeds from crops of conventional and herbicide tolerant oilseed rape ( Brassica napus )
| Autor: | Pat Wightman, P. J. W. Lutman, K. C. Walker, Jeremy Sweet, Martin Lainsbury, Kate Berry, M. J. May, R. W. Payne, G. T. Champion, Euan Simpson |
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| Rok vydání: | 2005 |
| Předmět: |
Crops
Agricultural Time Factors Population Dynamics Population Brassica Context (language use) Models Biological General Biochemistry Genetics and Molecular Biology Crop chemistry.chemical_compound Species Specificity Cultivar education General Environmental Science Analysis of Variance education.field_of_study General Immunology and Microbiology biology Herbicides Brassica napus Drug Tolerance General Medicine Plants Genetically Modified biology.organism_classification Horticulture Agronomy Glufosinate chemistry Glyphosate Seeds Sugar beet General Agricultural and Biological Sciences Research Article |
| Zdroj: | Proceedings of the Royal Society B: Biological Sciences. 272:1909-1915 |
| ISSN: | 1471-2954 0962-8452 |
| DOI: | 10.1098/rspb.2005.3166 |
| Popis: | A series of rotation experiments at five sites over four years has explored the environmental and agronomic implications of growing herbicide tolerant oilseed rape and sugar beet. This paper reports on the population dynamics of volunteer rape ( Brassica napus ). The experiments compared four winter oilseed rape (WOSR) cultivars: a conventional cultivar (Apex) and three developmental cultivars either genetically modified (GM) to be tolerant to glyphosate or glufosinate, or conventionally bred to be tolerant to herbicides of the imidazolinone group. Seed losses at harvest averaged 3575 seeds m −2 but ranged from less than 2000 up to more than 10 000 seeds m −2 . There was a rapid decline in seed numbers during the first few months after harvest, resulting in a mean loss of seeds of 60%. In subsequent seasons, the seedbank declined much more slowly at four of the five sites ( ca 20% per year) and the models predicted 95% seed loss after approximately 9 years. Seed decline was much faster at the fifth site. There were no clear differences between the four cultivars in either the numbers of seeds shed at harvest or in their subsequent persistence. The importance of the persistence of GM rape seeds, in the context of the coexistence of GM and non-GM crops and the role of good management practices that minimize seed persistence, are discussed. |
| Databáze: | OpenAIRE |
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