In Brittany (and around), some organic farmers and citizens are organized inside an association (Triptolème) for several years with the objectives of (i) linking up farmers, bakers, researchers and citizens on common projects ; (ii) sharing knowledge and know-how (by technical meetings and trainings) ; (iii) exchange seeds and discussing seed houses. They look for varieties adapted to their agricultural systems and markets. They have developed projects in order to increase biodiversity and its uses. To reach this goal, scientists and practitioners have built participatory research projects, as PaysBlé. This project will explore diversity at different levels from grain to bread (diversity of varieties, soils and soil management, leavens, flours, breads, breeding practices, baking practices…) and will try to link them. The project is a 3,5 years program funded by the “Bretagne”. It started in March 2009 and will end in September 2012.