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Potential for transgene flow from wheat to its wild relatives Aegilops sp.

Gesuchsteller/in Felber François
Nummer 115578
Förderungsinstrument NFP 59 Gentechnisch veränderte Pflanzen
Forschungseinrichtung Laboratoire de Botanique Évolutive Institut de Biologie Université de Neuchâtel
Hochschule Universität Neuenburg - NE
Hauptdisziplin Botanik
Beginn/Ende 01.06.2007 - 30.09.2011
Bewilligter Betrag 280'283.00
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Alle Disziplinen (4)

Forst- und Agrarwissenschaften

Keywords (6)

Risk assessment; gene flow; genetically engineered plants; bridge species; wheat; Aegilops cylindrical

Lay Summary (Englisch)

Lay summary
Transgenes inserted into crop plants could migrate into the genetic material of closely related wild types and cause undesirable effects - such as the development of resistance to herbicides.BackgroundGoatgrasses (Aegilops) are genetically closely related to wheat and are often found in wheat fields, where they can be very aggressive weeds. If genetically modified wheat - for example a variety resistant to a certain herbicide - was brought onto the market on a large scale, there would be a danger of the modified genes migrating by means of wheat pollen into the genetic material (genome) of goatgrasses, making these weeds resistant to herbicides too. This risk has been demonstrated on many occasions. However, little is known about the actual probability of this gene migration occurring.ObjectivesThe project aims to quantify to which extent the genes of genetically unmodified wheat have already mingled naturally with the genome of goatgrasses growing in the vicinity. The project also aims to assess the extent to which modified genes from transgenic wheat could spread into other, related wild types if they were to cross.MethodsVarious goat grasses from the Mediterranean region and North America will be investigated using genetic markers to establish how many genes have already migrated from unmodified wheat into the genome of these grasses through foreign pollination. The way these migrated genes are passed on to other related wild species will be investigated by cross-breeding various goatgrasses under both natural and experimental conditions.SignificanceThe frequency with which wheat genes are transferred to closely related wild types and an understanding of the mechanisms by which the transferred genes spread among the wild types are important in assessing the risk associated with the development of marketable transgenic wheat varieties. In addition, the goatgrasses that will be studied are currently native predominantly around the Mediterranean and in North America but are likely to become more common in our country in the future, not least because of their migratory potential and the effects of global warming.
Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

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