Data from University of Paris Saclay Advance Knowledge in Risk Management (Sampling Strategies for Evaluating the Rate of Adventitious Transgene…

Data from University of Paris Saclay Advance Knowledge in Risk Management (Sampling Strategies for Evaluating the Rate of Adventitious Transgene Presence in Non-Genetically Modified Crop Fields)

By a News Reporter-Staff News Editor at Insurance Weekly News -- Data detailed on Risk Management have been presented. According to news reporting originating in Thiverval Grignon, France, by VerticalNews journalists, research stated, "According to E.U. regulations, the maximum allowable rate of adventitious transgene presence in non-genetically modified (GM) crops is 0.9%. We compared four sampling methods for the detection of transgenic material in agricultural non-GM maize fields: random sampling, stratified sampling, random sampling + ratio reweighting, random sampling + regression reweighting."

The news reporters obtained a quote from the research from the University of Paris Saclay, "Random sampling involves simply sampling maize grains from different locations selected at random from the field concerned. The stratified and reweighting sampling methods make use of an auxiliary variable corresponding to the output of a gene-flow model (a zero-inflated Poisson model) simulating cross-pollination as a function of wind speed, wind direction, and distance to the closest GM maize field. With the stratified sampling method, an auxiliary variable is used to define several strata with contrasting transgene presence rates, and grains are then sampled at random from each stratum. With the two methods involving reweighting, grains are first sampled at random from various locations within the field, and the observations are then reweighted according to the auxiliary variable. Data collected from three maize fields were used to compare the four sampling methods, and the results were used to determine the extent to which transgene presence rate estimation was improved by the use of stratified and reweighting sampling methods."

According to the news reporters, the research concluded: "We found that transgene rate estimates were more accurate and that substantially smaller samples could be used with sampling strategies based on an auxiliary variable derived from a gene-flow model."

For more information on this research see: Sampling Strategies for Evaluating the Rate of Adventitious Transgene Presence in Non-Genetically Modified Crop Fields. Risk Analysis, 2017;37(9):1693-1705. Risk Analysis can be contacted at: Wiley, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell - www.wiley.com/; Risk Analysis - onlinelibrary.wiley.com/journal/10.1111/(ISSN)1539-6924)

Our news correspondents report that additional information may be obtained by contacting D. Makowski, Univ Paris Saclay, AgroParisTech, INRA, UMR Agron 211, F-78850 Thiverval Grignon, France. Additional authors for this research include R. Bancal, A. Bensadoun, H. Monod and A. Messean.

Keywords for this news article include: Thiverval Grignon, France, Europe, Risk Management, University of Paris Saclay.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2017, NewsRx LLC