Abstract: | 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. |