为改良大豆种质，提高其产量和品质，甘肃省农业科学院作物研究所以广适、丰产、抗逆性强的品种中品661为母本、吉育88为父本，经人工有性杂交采用系谱法选育出了大豆新品种陇豆3号。2019 — 2020年参加甘肃省大豆区域试验，2 a平均折合产量 2 771.25 kg/hm2，较对照品种陇豆2号增产8.00%。2021年参加甘肃省大豆生产试验，平均折合产量 2 677.20 kg/hm2，较对照品种陇豆2号增产 9.94%。该品种丰产性好，抗花叶病毒病，抗灰斑病，籽粒粗蛋白含量 381.8 g/kg，粗脂肪含量 208.2 g/kg。适宜甘肃省陇东、天水、沿黄和河西灌区春播，陇南地区夏播。

To improve soybean germplasm, yield and quality, a new soybean variety Longdou 3, obtained from the progeny population of a cross with Zhongpin 661 as female parent and Jiyu 88 as male parent, was bred by Institute of Crop Sciences, Gansu Academy of Agricultural Sciences. Data from regional trial of Gansu Province carried out in 2019 and 2020 showed that average yield was 2 771.25 kg/ha, which was 8.00％ higher compared with that of the control variety Longdou 2. Data from production trial of Gansu Province carried out in 2021 showed that average yield was 2 677.20 kg/ha which was 9.94％ higher compared with that of the control variety Longdou 2. This new variety with premium characters is resistant to flower leaf virus disease and grey speck disease. This variety shows good yield potential and is resistant to mosaic virus and grey blight diseases. The grains contained 381.8 g/kg crude protein and 208.2 g/kg ether extract and is suitable for spring sowing in eastern Gansu, Tianshui, irrigation districts along Yellow River and Hexi irrigation area as well as summer sowing in southern Gansu.

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甘肃省农业科学院科研条件建设及成果转化项目(2021GAAS04)；甘肃省农作物种质资源普查与收集(GNKJ-2021-44)；甘肃省省级重点人才项目(农作物种质资源保护利用与人才培养项目)。