The number of countries cultivating genetically modified (GM) crops and the global area devoted to them is increasing, and so is the number of domestic and international regulatory frameworks governing GM crops and derived products. Introduction of GM crops in the agricultural supply chain is being linked worldwide to the concept of "coexistence" with non-GM crops, to ultimately provide consumers with freedom of choice. The term coexistence is now used internationally in scientific, market and regulatory discussions, often with different meanings and covering different stages of the agricultural supply chain. Coexistence is about protecting farmers and all actors in the supply chain from the possible economic consequences of accidental mixing of GM and non-GM crops or derived products. Coexistence strategies need science-based technical measures and organisational changes that are economically feasible, with the aim to reduce admixtures at each step of the production chain to below various defined thresholds. The complexity of supply chains, the variability in labelling/traceability requirements and in GMO events authorised worldwide represent an added challenge for the design of practical coexistence strategies and best agricultural practices. This task involves scientists, policy-makers and the agricultural supply chain actors. In the long term, failure in achieving practical coexistence will impact diffusion of new technologies in agriculture and trade in agricultural products world-wide. GMCC-07 will present the latest research in agronomic, biological and socio-economic sciences taking place worldwide to support feasible coexistence strategies between GM and non-GM agricultural supply chains. The conference is directed to the scientific community, supply chain actors and policy-makers to access the latest scientific results and identify future research needs with policy relevance. The scientific programme will be multidisciplinary covering research activities and practical experiences on the following areas: Gene flow in agricultural systems Strategies for coexistence and organizational measures across the supply chain Case studies of specific supply chains Socio-economics of coexistence Legal and policy issues Traceability and control of coexistence Quantification of gene flow and adventitious presence Modelling and predicting gene flow Role of seeds and volunteers Strategies for managing gene flow Modelling supply chains Managing and decision tools for coexistence Coexistence and non food/feed crops (industrial, pharmaceutical, energy crops) Coexistence and seed production Coexistence and organic farming Economic analysis of coexistence measures along the supply chain Impact of coexistence on trade Markets and prices Market externalities Social and cultural factors shaping coexistence Coexistence regimes and effects on GM crops adoption by farmers Domestic and international regulatory approaches and experiences Trans-boundary issues and cross-border effects Liability and redress Insurance systems and compensation funds Asynchronous approvals of GMO events and coexistence Economic aspects of analytical controls Critical points and traceability Decision support systems for control and traceability Technical challenges in control and traceability Emilio Rodríguez-Cerezo (JRC-IPTS, European Commission) (Chair) Keith Alcock (Department of Agriculture & Food Western Australia, Australia) Frédérique Angevin (INRA, France) Yves Bertheau (INRA, France) Marie Cerovska (Ministry of Agriculture, Czech Republic) Chrystele Charles-Delobel (JRC-IHCP, European Commission) Phillippe Corbisier (JRC-IRMM, European Commission) Sybilla Fries (Legal Service, European Commission) Manuel Gómez-Barbero (JRC-IPTS, European Commission) Andreas Gumbert (DG Agriculture, European Commission) Jikun Huang (CCAP, China) Nicholas Kalaitzandonakes (University of Missouri, USA) Stephen Langrell (JRC-IPTS, European Commission) Antoine Messéan (INRA, France) Joaquima Messeguer (IRTA-CSIC, Spain) Søren A. Mikkelsen (DIAS, Denmark) Norma Pensel (INTA, Argentina) Joachim Schiemann (BBA, Germany) Alexander J. Stein (JRC-IPTS, European Commission) Jeremy Sweet (Cambridge, UK) René Van Acker (University of Guelph, Canada)