Considerations on the risk assessment of genetically modified plants containing transformation events stacked by conventional crossing

Following a mandate from EFSA, the EFSA Panel on Genetically Modified Organisms (GMO Panel) addressed the food and feed risk assessment of genetically modified plants containing stacked transformation events (‘stacks’). The GMO Panel examined the experience gained in the assessment of stacks in the last 20 years. Based on this, the GMO Panel concluded that under specific conditions, field trials for comparative analysis may not always be required for the assessment of stacks and a derogation may be considered.