The centre on Thursday moved the Supreme Court seeking modifications in its order on filed trials of genetically modified (GM) crops. The ministry of environment and forests in its application said the isolation distance of such crops during the course of their field trials should be in harmony with the Indian minimum seed certification standard. The apex court in its May 8 order had permitted filed trials of GM crops approved by the Genetic Engineering Approval Committee (GEAC) subject to the condition that their field should be at least 200 metres away from normal crops.