世界基准联盟（WBA）：2021年种子获取指数：西非和中非地区景观报告（英文版）

Companies were selected based on the following criteria: (1) regional presence or at least a regional influence; (2) physical presence and business activities in the region; (3) integrated seed business model; and/or (4) peer recognition as a leading company. The selection of the seed-producing cooperatives was based on peer recognition as leading players in the WCA seed sector by local partners in the region. The seed producing cooperatives all partner with national or international research