The phytochemical profiles and antioxidant capacities of 14 cowpea varieties (7 improved and 7 landraces) grown in Ethiopia were studied. The total phenolic, flavonoids, and monomeric anthocyanin contents (mg/100 g flour dry matter basis, db) ranged from 1210 to 1610 gallic acid equivalents, 250 to 1110 catechin equivalents and 3 to 7 cyanidin-3-glucoside equivalents, respectively. The antioxidant capacity measured using the 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity (DPPH), 2,2′-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) assays ranged from 26 to 92 and 89–125 μmol Trolox equivalent (TE)/g, and 62–90 μmol Fe²⁺/g db, respectively. p-Coumaric acid followed by sinapic acid predominated in the soluble fractions while salicylic acid followed by rosmarinic acid predominated in the bound fractions. The principal component analysis showed that most landrace cowpea grains showed higher total phenolic contents and antioxidant capacities than the improved grain varieties. The results suggested that landraces should be given due attention in future planning of cowpea breeding strategies.

研究了在埃塞俄比亚种植的14个cow豆品种（7个改良品种和7个地方品种）的植物化学特征和抗氧化能力。酚，类黄酮和单体花色苷的总含量（毫克/ 100克面粉干物质基准，db）分别为1210至1610没食子酸当量，250至1110儿茶素当量和3至7个花青素3-葡萄糖苷当量。使用2,2-二苯基-1-吡啶并肼基自由基清除活性（DPPH），2,2'-叠氮双（3-乙基苯并噻唑啉-6-磺酸）（ABTS）和三价铁还原抗氧化剂能力（FRAP）测定的抗氧化剂容量Trolox当量（TE）/ g的范围为26至92和89-125μmolFe ²⁺ / g db，范围分别为62-90μmol 。p-香豆酸，然后是芥子酸，在可溶级分中占优势，而水杨酸，然后是迷迭香酸，在结合级分中，占优势。主成分分析表明，大多数地方cow豆谷物比改良品种具有更高的总酚含量和抗氧化能力。结果表明，在future豆育种策略的未来规划中应适当注意地方品种。