‘Ace’ (Reg. no. CV‐329, PI 691530) is a small‐seeded cultivar of forage cowpea [Vigna unguiculata (L.) Walp.] that was developed by Texas A&M AgriLife Research at Overton, TX. Ace is intended for use in wildlife supplemental plantings, cover cropping systems, and hay production systems. Forage cowpeas are widely used in Texas and the U.S. southern region as supplemental plantings for white‐tailed deer, but seed production of late‐flowering forage cowpeas is restricted in northern Texas due to freeze kill prior to seed maturity. Mass selection within two highly variable plant introduction lines was used to develop Ace. Seed from five plants with very similar phenotypes, including first bloom in late August, was bulked and tested as experimental forage cowpea. Biomass production of Ace (experimental designation TX‐3) at Overton was 2.8 and 4.7 Mg ha⁻¹ in 2013 and 2015, respectively. Biomass production of Ace at Vernon, TX, in 2015, 2016, and 2017 was 3.9, 5.9, and 6.7 Mg dry matter ha⁻¹, respectively. Protein content of Ace biomass at Vernon in 2015 and 2016 was 16.5 and 16.4, respectively. Seed production of Ace at Vernon ranged from 106 to 670 kg ha⁻¹. The seed size of Ace, expressed as seed weight, was 5.1 g 100 seeds⁻¹, compared with Iron & Clay at 10.6 g 100 seeds⁻¹. Average days to first bloom at Overton for Ace and Iron & Clay are 87 and 114, respectively. Root galling of Ace by southern root‐knot nematode (Meloidgyne incognita Race 3) is very low, and nematode reproduction is low, relative to southern root‐knot nematode–susceptible cowpea lines. Greenhouse seed germination studies indicate about 25% of Ace seed would survive after 2 mo of simulated field conditions and that all seed would be germinated after 3 mo. The reseeding potential of Ace needs further study.

中文翻译：

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'Ace'age豆

'Ace'（Reg。no。CV‐329，PI 691530）是草食cow豆的小种子品种[ Vigna unguiculata（L.）Walp。]由德克萨斯州奥弗顿市的Texas A＆M AgriLife Research开发。Ace旨在用于野生动植物的补充种植，覆盖作物系统和干草生产系统。Texas豆在得克萨斯州和美国南部地区被广泛用作白尾鹿的补充种植，但得克萨斯州北部由于种子成熟前的冻死，后期开花的flower豆的种子生产受到限制。在两个高度可变的植物导入系中进行质量选择，以开发Ace。来自五种具有非常相似表型的植物的种子，包括八月下旬的第一朵花，被散装并作为实验性cow豆试验。欧弗顿的Ace（实验代号TX-3）的生物量生产为2.8和4.7 Mg ha ^-1分别在2013年和2015年。2015年，2016年和2017年，德克萨斯州弗农的Ace生物量生产分别为3.9 Mg，5.9 Mg和6.7 Mg干物质ha ^-1。维农2015年和2016年Ace生物量的蛋白质含量分别为16.5和16.4。在弗农的王牌种子的产量为106至670 kg公顷^-1。Ace的种子大小（以种子重量表示）为5.1 g 100种子^-1，而Iron＆Clay的种子大小为10.6 g 100种子^-1。Ace和Iron＆Clay在Overton首次开花的平均天数分别是87和114。南方根结线虫（Meloidgyne incognita相对于南方根结线虫易感的cow豆品系，第3族非常低，线虫繁殖率低。温室种子发芽研究表明，模拟田间环境2个月后，约25％的Ace种子将存活，而3个月后，所有种子将发芽。Ace的播种潜力有待进一步研究。