Rothamsted Research

where knowledge grows

Rothamsted Research is granted permission by Defra to plant autumn-sown wheat as part of its GM field trial

GM Wheat Trial

Rothamsted Research has been granted permission by Defra to extend its current GM wheat field trial to include additional autumn-sown cadenza wheat. Rothamsted scientists believe it would be advantageous to gain further data from their experiment, in wheat planted at a different time and under different weather conditions with different aphid populations. This will give us additional data under a more diverse range of environmental conditions.

Rothamsted therefore submitted on March 25th a request to Defra, which was assessed by the independent Advisory Committee on Releases to the Environment (ACRE), and by members of the public through a 60-day consultation period. ACRE is satisfied that all scientific issues raised by the public with respect to this application have been addressed.

During this period and in addition to the formal consultation run by ACRE, Rothamsted Scientists have also spoken to and answered questions directly from the public, special interest and GM opposition groups, such as GMFreeze since they publicly announced their submission to Defra.

Because the UK’s temperate climate permits wheat plant growth during the winter, Cadenza wheat can be sown in either the autumn or the spring and both sowings are harvested in August/September. As such, the extension of the experiment will further increase the relevance to UK farmers and those in other temperate climates by covering a greater range environmental variability.  This weather variability has been particularly evident in the UK in the past 12 months.

Research leader Professor John Picket said “With the trial up and running, it seems sensible to make this small adjustment. Autumn infestations of aphids are a real problem too, especially with the varied weather we are having. This additional data will add a lot of value to the overall investigation by testing our wheat plant under a more varied range of environmental conditions throughout the year and in accordance with the different times of the year farmer’s plant their wheat.”

The controlled experiment being conducted by scientists from Rothamsted Research combines modern genetic engineering with natural plant defenses to test whether aphid-repelling wheat works in the field.

Wheat is the most important UK crop with an annual value of about £1.2 billion. Currently a large proportion of UK wheat is treated with a broad spectrum of chemical insecticides to control cereal aphids, which reduce yields by sucking sap from plants and by transmitting barley yellow dwarf virus. Unfortunately, repeated use of insecticides often leads to aphids developing resistance, while killing other non-target insect species including the natural enemies of aphids, which itself could have further impacts on biodiversity.

Rothamsted Research scientists, who receive strategic funding from the UK Government through the Biotechnology and Biological sciences Research Council (BBSRC), have been seeking novel ecological solutions to overcome this problem in wheat. One approach has been to use an odour, or alarm pheromone, which aphids produce to alert one another to danger. This odour, (E)-β-farnesene, is also produced by some plants as a natural defense mechanism and not only repels aphids but also attracts the natural enemies of aphids, ladybirds for example. This work has been effective in the laboratory and Rothamsted scientists have already conducted the first field trial to investigate whether the GM plants work outside in the field, as well as in the laboratory. 

The autumn sowing extension of the current field trial that Rothamsted Research got permission to conduct involves exactly the same GM lines and the experimental design as the current spring-sown experiment. The autumn extension to the trial will be sown in mid Sept and destroyed after 10-12 weeks in late Nov or late Dec depending on the weather. 

Rothamsted Research Director, Professor Maurice Moloney said “we are very grateful to Defra  for granting this extension, and to ACRE for their independent and thorough scientific scrutiny of our proposal. We worked hard last year to engage the public and listened to their views. The more data we can gather, the more evidence we will be able to obtain for Government and society to make decisions whether they wish to explore this next generation GM technology further”.

Professor Douglas Kell, BBSRC Chief Executive, said: "BBSRC welcomes this important research to explore one approach to help solve the global challenge of producing food sustainably for a growing population, while minimising environmental effects.  We look forward to results from this study, which will help provide answers about the potential of this type of GM technology and what benefits it could offer”. Professor Kell added:   "The findings generated through this extension will add to the picture of how this technology compares to others. It is vital that future decisions are based on scientific evidence." 

This filed trial is part of a five-year project funded by BBSRC and more information can be found at Rothamsted Research Wheat trial page.

Make a comment

We are happy to receive your comments and address your questions directly during the course of this experiment. Please go the Questions and Answers to read more and/or to leave a comment.


Gibson RW & Pickett JA 1983. Nature 302: 608-609.

Beale MH et al. 2006. PNAS 103: 10509-10513.

Bruce 2012. J. Exp. Botany 63: 537-541.

Al Abassi et al. 2000 J. of Chem. Ecol. 26, 1765-1771.`

Breeding oilseed rape varieties for pollinator-friendly traits

Amounts and sugar content of nectar vary between commercial varieties of oilseed rape (OSR) produced with different breeding systems, when tested in the glasshouse.

Black-grass requires a ‘three-pronged’ attack

Black-grass requires a three-pronged attack to promote and develop sustainable management solutions.

Mineral vital to human health will decrease due to climate change

New model developed to understand the variation in selenium concentrations in soil finds climate is key to its global distribution.

Rothamsted Research Celebrates £2,500 gift from the Patron's Fund

Charitable fund acknowledges the work of the charitable organisations for which Her Majesty, The Queen acts as a Patron.


Rothamsted Press Office

For further information, please contact:

Dr Matina Tsalavouta (, Tel: +44 (0) 1582 938 525

About Rothamsted Research

We are the longest running agricultural research station in the world, providing cutting-edge science and innovation for over 170 years. Our mission is to deliver the knowledge and new practices to increase crop productivity and quality and to develop environmentally sustainable solutions for food and energy production.

Our strength lies in the integrated, multidisciplinary approach to research in plant, insect and soil science.

Rothamsted Research is strategically funded by the Biotechnology and Biological Sciences Research Council (BBSRC). In 2013-2014 Rothamsted Researched received a total of £32.9M from the BBSRC.


The Biotechnology and Biological Sciences Research Council (BBSRC) invests in world-class bioscience research and training on behalf of the UK public. Our aim is to further scientific knowledge, to promote economic growth, wealth and job creation and to improve quality of life in the UK and beyond.

Funded by Government, BBSRC invested over £509M in world-class bioscience in 2014-15. We support research and training in universities and strategically funded institutes. BBSRC research and the people we fund are helping society to meet major challenges, including food security, green energy and healthier, longer lives. Our investments underpin important UK economic sectors, such as farming, food, industrial biotechnology and pharmaceuticals.

For more information about BBSRC, our science and our impact see:

For more information about BBSRC strategically funded institutes see: