The humid tropics of Central and Eastern Africa hold much promise for enhancing food and nutritional security within and beyond Africa. With a rich variety of agroecological zones and diverse farming systems, they are home for a great part of the rural population and a large diversity of living organisms, offering vital ecosystem services and potential for sustainable development. Still, if we are to tap into this potential, we need to address the complex environmental, social and economic challenges they face, which in cases are exacerbated by conflict and high vulnerability. In this context, CANALLS aims to drive agroecological transitions in the humid tropics of Central and Eastern Africa via multi-actor transdisciplinary Agroecology Living Labs (ALLs). We start with 8 ALLs in DRC, Burundi, Cameroon and Rwanda, working alongside and enabling over 20,000 farmers and value chain actors to co-create and benefit from optimal combinations of agroecological practices focusing on crops that are vital for subsistence and economic development (cocoa, coffee, cassava, rice, maize). In parallel, we engage in solid multi-actor collaboration with rural communities, advisory services and governments to develop a holistic assessment framework and evaluate the socio-economic and environmental performance of the co-created practices (accounting for trade-offs and synergies). We use the comprehensive evidence generated to build capacity and share knowledge (practice abstracts, replication guidelines, policy recommendations) as well as to deliver fair, inclusive and sustainable business models along with services and tools for facilitating access to markets and enhancing demand for agroecological products. Our vision is to create a growing network of ALLs that leverages EU-AU cooperation to conduct transdisciplinary research, offer scientific support and drive coordinated action for delivering holistic solutions that help shape enabling conditions for agroecological transitions.

Many tropical tree crops are threatened by climate change (CC), including coffee which is highly sensitive to high temperatures, droughts and diseases. 60% of coffee today is cultivated in Agroforestry Systems (AFS), which reduce dependence on external inputs and mitigate the adverse effects of CC. So far, however, breeding has developed cultivars only for open-sun cultivation. Using new Arabica coffee F1 hybrids as a case study, we will design and test coffee varieties, better adapted to AFS and CC and maintaining a robust defense system to biotic and abiotic stresses. By doing so, we will show how breeding programs can benefit both smallholder farmers by improving their incomes, increase the options for sustainability, and benefit the European industry through sustained supplies and a wider range of specialty coffees. The project will take advantage of hybrids, established in 8 countries (Portugal, France, Nicaragua, Costa Rica, French Guyana, Cameroon, El Salvador, Vietnam) under controlled conditions (temperature, light, CO2), field trials and networks of on-farm plots. GxE will be assessed through a multidisciplinary approach where genotypes will be grown in a wide range of environments and low-input management inherent to AFS. Farmers will participate in developing the farm assessment methodology and their experiences with new hybrids (profitability, social acceptance) will inform the breeding strategy. Roasters will be involved in the breeding process through evaluation of beverage quality. By combining extensive phenotyping with metabolomic and transcriptomic analysis, we will develop analytical and predictive tools for Coffee Metabolic Networks, leading to marker aided rapid selection and a new approach for breeding of perennial crops. Impacts will be ensured by innovation platforms, technology transfer for clonal propagation, promotion of direct trading between roasters and farmers, and promotion of new hybrids adapted to AFS.