抗旱、抗病、丰产品种是甘肃中部干旱半干旱区及类似生态区春小麦生产可持续发展的关键。 陇春 45 号是以甘春20号为母本、陇春 27 号为父本进行有性杂交，采用系谱法选育出的旱地春小麦新品种。该品种在2020 — 2021 年甘肃省旱地春小麦区域试验中，平均折合产量 3 220.28 kg/hm2， 较对照品种西旱 2 号增产5.41％；在2022年甘肃省旱地春小麦生产试验中，平均折合产量 2 634.60 kg/hm2 ，较对照品种西旱 2 号增产11.50%。生育期 101 d，株高 91.1 cm，穗粒数 35.6 粒，千粒重 43.3 g。籽粒含粗蛋白(干基)160.4 g/kg、湿面筋385.0 g/kg，容重802 g/L，面团吸水量623 mL/kg，形成时间3.3 min，稳定时间2.1 min。田间表现中抗条锈病和白粉病、抗旱、抗倒伏等特点，适宜在甘肃省旱地春麦区及类似生态区种植。

Drought-resistant, disease-resistant, and high-yielding varieties are the key to sustainable development of spring wheat production in central Gansu arid and semi-arid area and similar ecological areas. A new dryland spring wheat variety, Longchun 45, was successfully bred. This was achieved through sexual hybrid-breeding, using Ganchun 20 as the female parent and Longchun 27 as the male parent, with the application of pedigree method. In the 2020 to 2021 regional experiment of dryland spring wheat in Gansu Province, the average yield of Longchun 45 reached 3 220.28 kg/ha, which was 5.41% higher than that of the control variety, Xihan 2. In the 2022 production experiment of dryland spring wheat in Gansu Province, its average yield was 2 634.60 kg/ha, showing an 11.50% increase compared to Xihan 2. The growth period of this variety is 101 days. It has a plant height of 91.1 cm, with an average of 35.6 grains per spike and a thousand-grain weight of 43.3 g. It has a grain bulk density of 802 g/L, contains 160.4 g/kg crude protein (on a dry basis), 385.0 g/kg wet gluten, and has a dough water absorption of 623 mL/kg, a dough formation time of 3.3 minutes, and a stabilization time of 2.1 minutes. Moreover, it has moderate resistance to stripe rust and powdery mildew, along with good drought resistance and lodging resistance. It is well-suited for cultivation in the dryland spring wheat areas of Gansu Province and regions with similar ecological conditions.

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甘肃省科技计划项目(23CXNA0027 )；甘肃省农业科学院现代生物育种项目(2025GAAS11)；甘肃省农业科学院区域创新项目(2023GAAS09)。