It is widely recognized that the conservation of the Crop Wild Relatives (CWR) in their wild habitats is fundamental to ensure the continuous supply of novel genetic material, crucial for future crop improvement. Vigna unguiculata (cowpea) and V. subterranea (bambara groundnut) are amongst the most significant African legumes as sources of food and fodder. In this study we investigated the diversity of Vigna species in Angola, to identify hotspot areas for their in situ conservation, and thus underpin future food security in Sub-Saharan Africa. Based on four criteria (i.e. potential utilization for crop improvement, threat status, ethnobotanical value, and geographical distribution) we prioritize Vigna CWR for conservation actions in Angola. Our results reveal that 28 Vigna species occur in Angola, two of which are endemic (V. mendesii and V. ramanniana). These species are unevenly distributed across the country, with greater dominance in the central-north and western areas, where four hotspot areas (Saurimo, Serra da Chela, N’dalatando, and Huambo) are identified. However, significant gaps in the current in situ conservation strategies are highlighted by our results, since the CWR diversity hotspots remain unprotected and only nine of the 28 Vigna species are recorded in protected areas. Moreover, in light of the fact that only one accession of Vigna collected in Angola exists in genebanks globally at present, we recommend a targeted seed collecting programme to support future management and ex situ conservation of plant genetic resources in Angola. Our study calls attention to the fact that Angola, together with Zambia, has the highest Vigna species richness in Sub-Saharan Africa, and provides new data and tools for the sustainable use of these species in crop improvement.

人们普遍认识到，在野生动植物栖息地中保存作物野生亲缘种（CWR）对于确保持续供应对未来作物改良至关重要的新型遗传物质至关重要。豇豆（豇豆）和五subterranea（班巴拉花生）是最显著非洲豆类食品和饲料的来源当中。在这项研究中，我们调查了安哥拉Vigna物种的多样性，以发现热点地区进行原位保护，从而为撒哈拉以南非洲的未来粮食安全奠定基础。基于四个标准（即潜在的作物改良利用，威胁状态，植物学价值和地理分布），我们将维格纳列为优先事项为安哥拉的保护行动编写的CWR。我们的研究结果表明，安哥拉有28种Vigna物种，其中两种是地方性的（门氏弧菌和拉曼叶弧菌）。这些物种在全国各地分布不均，在中北部和西部地区占主导地位，在那里确定了四个热点地区（萨里莫，塞拉达切拉，恩达拉丹多和万博）。但是，由于CWR多样性热点仍未受到保护，并且28种Vigna物种中只有9种记录在保护区中，因此我们的结果突出表明了当前就地保护策略中的巨大差距。此外，鉴于只有Vigna的一种加入目前在全球的种质库中有在安哥拉收集的种子，我们建议针对性的种子收集计划，以支持安哥拉植物遗传资源的未来管理和非原生境保存。我们的研究提请注意以下事实：安哥拉与赞比亚一起在撒哈拉以南非洲地区拥有最高的Vi豆物种丰富度，并为可持续利用这些物种改善作物提供了新的数据和工具。