For probably as long as people have lived in Africa, they have eaten culturally and traditionally important indigenous fruits such as baobab, desert date, black plum, and tamarind. Farmers have been able to enjoy the fruit of these plentiful wild trees without developing any knowledge of how to propagate them successfully; they haven’t needed to.
Cemansky, R. (2015). Africa’s Indigenous Fruit Trees: A Blessing in Decline.Environmental Health Perspectives, 123(12), A291–A296. http://doi.org/10.1289/ehp.123-A291