针对甘肃省自然条件复杂，广适型大豆品种少，播种面积增长缓慢的现状，为选育出高产、稳产、抗病、适应性广的大豆新品种，甘肃省农业科学院作物研究所大豆课题组以吉育72为母本、Stout为父本，利用系谱法经过连续多年选择杂交选育出大豆新品种陇豆5号。该品种在2021 — 2022年进行的甘肃省大豆品种(系)区域试验中，2 a 10点(次)平均折合产量2 808.00 kg/hm2，较对照品种陇豆2号增产3.20%。在2023年进行的甘肃省大豆品种(系)生产试验中，7个试点平均折合产量为3 030.30 kg/hm2，较对照品种陇豆2号增产4.30%。陇豆5号平均生育期128 d，属中晚熟品种，植株田间长势好、落叶性好、抗倒伏，抗花叶病毒病，抗灰斑病。籽粒饱满、圆形，商品性好，粗蛋白(干基)含量为394.8 g/kg，脂肪(干基)含量为202.1 g/kg。具有高产、稳产、抗病和广适应性等特性。该品种适宜春播种植，在甘肃省雨养农业区(干旱、半干旱)和非保灌区的中晚熟及晚熟品种类型区及类似生态区均可种植。

In response to the complex natural conditions in Gansu Province, the scarcity of widely adaptable soybean varieties, and the slow increase in planting area, a new soybean variety Longdou 5, obtained from the progeny population of a cross with Jiyu 72 as female parent and Stout as male parent, was bred by the Institute of Crop, Gansu Academy of Agricultural Sciences over several years using the pedigree method. In the Gansu Province soybean variety (line) regional experiment conducted from 2021 to 2022, the average yield of Longdou 5 across 10 points over 2 years was 2 808.00 kg/ha, which was an increase of 3.20% compared to the control variety Longdou 2. In the production experiment conducted in Gansu Province in 2023, the average yield across 7 test points was 3 030.30 kg/ha, an increase of 4.30% compared to the control variety Longdou 2. Longdou 5 has an average growth period of 128 days and is classified as a medium-late maturing variety. It exhibits good field growth, good defoliation, resistance to lodging, resistance to mosaic virus disease and gray spot disease. The grains are plump and round with good commercial quality, containing 394.8 g/kg of crude protein(dry basis) and 202.1 g/kg of ether extract(dry basis). It has characteristics of high yield, stable yield, disease resistance, and wide adaptability. This variety is suitable for spring planting and can be cultivated in the rainfed agricultural areas (arid and semi-arid) and non-irrigated areas of Gansu Province, as well as in similar ecological regions using medium-late and late-maturing varieties.

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2024年陇原青年创新创业人才团队项目(大豆抗旱种质创制、基因克隆与人才培养)(甘组通字〔2024〕4号)；兰州市人才创新创业项目(2022-RC-64)；2022年省级重点人才项目(农作物种质资源保护利用与人才培养)(2022RCXM083)；甘肃省农业科学院博士基金项目(2023GAAS43)。