Orphan (or minor) crops are those crops which are typically not traded internationally, but which can play an important role in regional food security.; Food crops such as millet, sorghum and cassava, among many others that are primarily grown for subsistence as they are not commercially viable.; A diverse set of minor crops like tef, finger millet, yam, roots and tubers that tend to be regionally important but not traded around the world and receive no attention by research networks.