This partnership project is presented under the ERDF OP’s call for collaborative research projects 2014-2020, tranche 1. Led jointly by INRA, CIRAD and the University of the West Indies (C3MAG and UMR ECOFOG AgroParisTech/CIRAD/INRA/UA/UG), this project has been scientifically evaluated. CIRAD is piloting the consortium. The objective of the project is to contribute to the development of sustainable agriculture in Guadeloupe, and more broadly in the French Antilles by supporting through cognitive and methodological research the emergence of varietal solutions to the main constraints of the yam and citrus sectors. For yams adaptation to low input production systems, resistance to anthracnose, quality and productivity will be the main targets. For citrus fruits adaptation to biotic and abiotic constraints and in particular to greening will be a central objective while seeking to improve the quality of products and the spread of production. The project brings together the scientific expertise of CIRAD, INRA and the University of the West Indies in the field of genetics, genomics, physiology and ecophysiology of food technology, pathology, imaging and the socio-economics of innovation. It is directly upstream of the platforms for the selection of new varieties supported by the RDRG, allowing the rapid transfer of varietal innovations to farmers.