为培育出抗旱、抗病、丰产稳产、优质、适应性广的豌豆新品种，为我国北方干旱半干旱区豌豆品种的更新换代提供支撑。以8707-15为母本、S9114为父本，采用杂交选育法培育出旱地豌豆新品种定豌12号。在2018 — 2020年多点试验中，3 a 15点(次)折合平均产量2 404.5 kg/hm2，较对照品种定豌4号增产12.54%；在2020 — 2021年国家春播豌豆新品种联合鉴定试验中，2 a 14点(次)折合平均产量2 842.4 kg/hm2，较对照品种中豌6号增产32.61%。该品种平均株高107.5 cm，生育期92 d左右，主茎节数16.1节，单株有效荚数6.1个，单荚粒数4.9粒，百粒重21.7 g，经济性状优良。干籽粒含粗蛋白219.5 g/kg、赖氨酸13.9 g/kg、粗脂肪12.3 g/kg、粗淀粉567 g/kg。抗旱、抗白粉病、抗锈病，丰产、稳产性好。适宜在甘肃中部干旱、半干旱地区及其同类地区推广种植。
To breed new pea varieties with drought resistance, disease resistance, high and stable yield, high quality and wide adaptability so as to provide support for the upgrading of pea varieties in arid and semi-arid region in northern China, using 8707-15 as the female parent and S9114 as male parent, through sexual hybridization and pedigree breeding method, a new pea variety Dingwan 12 was bred. In 15 points multi-site experiment from 2018 to 2020, the average yield in 3 a was 2 404.5 kg/ha, which was increased by 12.54% when compared withthat of the control variety Dingwan 4. In the national joint identification experiment for spring seeding new pea variety, 2020 to 2021, the average yield from 14 points in 2 a was 2 842.4 kg/ha, which was 32.61% higher than that of the control variety Zhongwan 6. Its average plant height was 107.5 cm, the growth period was 92 days, and node number of the main stem, effective pod number per plant and grains per pod were 16.1, 6.1, 4.9, respectively. Its 100-seed weight was 21.7 g which showed ideal economic traits. Contents of crude protein, lysine, ether extract and starch in dry seeds were 219.5 g/kg, 13.9 g/kg, 12.3 g/kg and 567 g/kg, respectively. It is drought resistant, powdery mildew resistant, rust resistant with high and stable yield, and is suitable to plant in arid, semi-arid region in Gansu and other areas with similar ecological conditions.