New Zealand scientists are running experiments with genetically modified grass on foreign soil, with the aim of using the results to begin field trials at home.
It's one of the issues to be discussed by some of the biggest names in GM science, when they gather in Rotorua today.
Trials on GM ryegrass in the United States are being conducted by a government-funded research body Pastoral Genomics.
Crown research institute AgResearch is involved, and director Dr Michael Dunbier says there are also plans for another trial in Australia.
Opponents of Genetic Modification say the tests are part of a research and PR strategy to get GM grasses on the market in New Zealand.