PURPOSE: Feral oilseed rape has become widespread in Europe on waysides and waste ground. Its potential as a source of GM impurity in oilseed rape harvests is quantified, for the first time, by a consistent analysis applied over a wide range of study areas in Europe. METHODS: The maximum contribution of feral oilseed rape to impurities in harvested crops was estimated by combining data on feral abundance and crop yield from five established, demographic studies in agricultural habitats in Denmark, Germany (2), France and the UK, constituting over 1,500 ha of land and 16 site-years of observations. Persistence of feral populations over time was compared by visual and molecular methods. RESULTS: Ferals had become established in all regions, forming populations 0.2 to 15 km⁻². The seed they produced was always <0.0001% of the seed on crops of oilseed rape in each region. The contribution of ferals to impurity in crops through accidental harvest of seed and through cross-pollination would be an even smaller percentage. Feral oilseed rape nevertheless showed a widespread capacity to persist in all regions and retain traits from varieties no longer grown. CONCLUSIONS: Feral oilseed rape is not a relevant source of macroscopic impurity at its present density in the landscape but provides opportunity for genetic recombination, stacking of transgenes and the evolution of genotypes that under strong selection pressure could increase and re-occupy fields to constitute an economic weed burden and impurity in future crops.
PURPOSE: Feral oilseed rape has become widespread in Europe on waysides and waste ground. Its potential as a source of GM impurity in oilseed rape harvests is quantified, for the first time, by a consistent analysis applied over a wide range of study areas in Europe. METHODS: The maximum contribution of feral oilseed rape to impurities in harvested crops was estimated by combining data on feral abundance and crop yield from five established, demographic studies in agricultural habitats in Denmark, Germany (2), France and the UK, constituting over 1,500 ha of land and 16 site-years of observations. Persistence of feral populations over time was compared by visual and molecular methods. RESULTS: Ferals had become established in all regions, forming populations 0.2 to 15 km⁻². The seed they produced was always <0.0001% of the seed on crops of oilseed rape in each region. The contribution of ferals to impurity in crops through accidental harvest of seed and through cross-pollination would be an even smaller percentage. Feral oilseed rape nevertheless showed a widespread capacity to persist in all regions and retain traits from varieties no longer grown. CONCLUSIONS: Feral oilseed rape is not a relevant source of macroscopic impurity at its present density in the landscape but provides opportunity for genetic recombination, stacking of transgenes and the evolution of genotypes that under strong selection pressure could increase and re-occupy fields to constitute an economic weed burden and impurity in future crops.
Authors: Claudio E Pandolfo; Alejandro Presotto; Francisco Torres Carbonell; Soledad Ureta; Mónica Poverene; Miguel Cantamutto Journal: Environ Sci Pollut Res Int Date: 2016-09-16 Impact factor: 4.223
Authors: J Franzaring; K Wedlich; A Fangmeier; S Eckert; J Zipperle; I Krah-Jentgens; C Hünig; W Züghart Journal: Environ Sci Pollut Res Int Date: 2016-10-11 Impact factor: 4.223
Authors: Hanspeter Naegeli; Jean-Louis Bresson; Tamas Dalmay; Ian Crawford Dewhurst; Michelle M Epstein; Leslie George Firbank; Philippe Guerche; Jan Hejatko; Francisco Javier Moreno; Ewen Mullins; Fabien Nogué; Nils Rostoks; Jose Juan Sánchez Serrano; Giovanni Savoini; Eve Veromann; Fabio Veronesi; Michele Ardizzone; Yann Devos; Silvia Federici; Antonio Fernandez Dumont; Andrea Gennaro; Jose Ángel Gómez Ruiz; Franco Maria Neri; Nikoletta Papadopoulou; Konstantinos Paraskevopoulos; Anna Lanzoni Journal: EFSA J Date: 2021-06-17
Authors: Danny A P Hooftman; James M Bullock; Kathryn Morley; Caroline Lamb; David J Hodgson; Philippa Bell; Jane Thomas; Rosemary S Hails Journal: Ann Bot Date: 2014-11-30 Impact factor: 4.357