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New Anglo-Swiss research questions impact of GM wheat on insects
Date:1/21/2011

An Anglo-Swiss research project has found that the impact of disease-resistant genetically-modified wheat plants on insects may be negligible.

Many studies have looked at the effects of genetically-modified (GM) plants on single non-target insects. However, agro-ecosystems are characterised by numerous insect species forming food webs. This study is the first to investigate different transgenic disease-resistant wheat lines and their effect on the structure of whole aphid-parasitoid food webs.

The findings are published this week in the Royal Society journal, Biology Letters, in the paper: "Aphid-parasitoid community structure on genetically modified wheat."

The study was carried out by Simone von Burg, a PhD student at the University of Zurich, in collaboration with Dr Frank van Veen of the University of Exeter and with Dr Fernando Alvarez-Alfageme and Dr Jrg Romeis of the Agroscope Reckenholz-Tnikon Research Station ART, also in Zurich.

A concern raised with respect to genetic modification (GM) of crops is that the plants may not just affect the disease or pest to which they are meant to be resistant, but may also have negative effects on other valued, non-target species.

Dr van Veen said: "The main conclusion in a nut shell is that while genetic modification has considerable ecological effects, the differences between the GM wheat strains and their non-GM counterparts are similar to the differences we find between different conventional (non-GM) wheat strains. Moreover, these differences were not consistent between the two study years.

"So, within this context, there appear to be no ecological problems associated with the genetically-modified wheat lines tested in this study."

The experiments took place in Switzerland but the results were analysed in the UK at the laboratories of the Centre for Ecology and Conservation at Exeter's Cornwall Campus where Dr van Veen is based.


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Contact: Daniel Williams
d.d.williams@exeter.ac.uk
44-013-927-22062
University of Exeter
Source:Eurekalert

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