Featured Research

from universities, journals, and other organizations

GM Field Trials 'Underestimate Potential For Cross-pollination'

Date:
June 1, 2007
Source:
University of Exeter
Summary:
Field trials could be underestimating the potential for cross-pollination between GM and conventional crops, according to new research. The research team recommends a new method for predicting the potential for cross-pollination, which takes account of wind speed and direction.

Field trials could be underestimating the potential for cross-pollination between GM and conventional crops, according to new research by the University of Exeter. The research team recommends a new method for predicting the potential for cross-pollination, which takes account of wind speed and direction.

The research, used records of wind speed and direction from weather stations across Europe to predict the movement of pollen in the air. The findings show huge variation in the amount of cross-pollination between GM and non-GM crops of maize, oilseed rape, rice and sugar beet. Levels vary according to whether the GM field is upwind or downwind of the non-GM field given the direction of the prevailing wind over the flowering period of the crop.

Field trials are regularly carried out to measure the potential for cross-pollination between GM and conventional crops. Current guidelines for minimum field-to-field distances are based on the results from these trials. However, if the GM field in a trial is downwind of the non-GM field, the trial will underestimate the potential for cross-pollination.

'We were struck by the strong influence of wind direction on the amount of cross-pollination', said Martin Hoyle of the University of Exeter. 'Wind speed and direction are important factors outside of our control that have not previously been used to inform guidelines on minimum field-to-field distances. Recommended minimum distances between GM and conventional crops may need to be increased based on our findings.'

Field trials are time-consuming and expensive, so measuring the potential for cross-pollination across the full range of weather conditions is not feasible. This research resulted in the development of a theoretical computer model to analyse the effects of wind on pollen travel. The model, together with measurements of cross-pollination and wind speed and direction from field trials, can be used to predict cross-pollination at other times and sites.

'If the production of GM crops becomes widespread in Europe, it is essential that measures are taken to minimise cross-pollination from GM to conventional non-GM crops,' said Hoyle. 'The recommended minimum distances between GM and conventional crops should be informed by weather data, which is possible using our model of pollen dispersal in the wind.'

This research was funded by the Natural Environment Research Council (NERC) and published 1 June 2007 in the journal Ecological Applications. Ecological Applications is the journal of the Ecological Society of America.


Story Source:

The above story is based on materials provided by University of Exeter. Note: Materials may be edited for content and length.


Cite This Page:

University of Exeter. "GM Field Trials 'Underestimate Potential For Cross-pollination'." ScienceDaily. ScienceDaily, 1 June 2007. <www.sciencedaily.com/releases/2007/05/070531191126.htm>.
University of Exeter. (2007, June 1). GM Field Trials 'Underestimate Potential For Cross-pollination'. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2007/05/070531191126.htm
University of Exeter. "GM Field Trials 'Underestimate Potential For Cross-pollination'." ScienceDaily. www.sciencedaily.com/releases/2007/05/070531191126.htm (accessed October 22, 2014).

Share This



More Plants & Animals News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Working Mother DIY: Pumpkin Pom-Pom

Working Mother DIY: Pumpkin Pom-Pom

Working Mother (Oct. 22, 2014) How to make a pumpkin pom-pom. Video provided by Working Mother
Powered by NewsLook.com
San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

San Diego Zoo's White Rhinos Provide Hope for the Critically Endangered Species

Reuters - Light News Video Online (Oct. 22, 2014) The pair of rare white northern rhinos bring hope for their species as only six remain in the world. Elly Park reports. Video provided by Reuters
Powered by NewsLook.com
Raw: Bear Cub Strolls Through Oregon Drug Store

Raw: Bear Cub Strolls Through Oregon Drug Store

AP (Oct. 22, 2014) Shoppers at an Oregon drug store were surprised by a bear cub scurrying down the aisles this past weekend. (Oct. 22) Video provided by AP
Powered by NewsLook.com
Family Pleads for Pet Pig to Stay at Home

Family Pleads for Pet Pig to Stay at Home

AP (Oct. 22, 2014) The Johnson family lost their battle with the Chesterfield County, Virginia Planning Commission to allow Tucker, their pet pig, to stay in their home, but refuse to let the board keep Tucker away. (Oct. 22) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins