关键词: 甘薯[Ipomoea batatas（L.）Lam.], 新品种, 川薯251, 优质, 鲜食, 选育, 特征特性

Abstract: To develop a high-quality table-type sweet [Ipomoea batatas (L.) Lam.] potato variety adapted to the production requirements of Sichuan Province and the Southwest Sweet Potato Region of China, a hybridization was conducted using Chuanshu 228 as the female parent and elite line Chuanshu 1386 as the male parent. Through successive selection of seedling progenies, line evaluation, regional trials, and production trials, Chuanshu 251,a new table-type sweet potato variety, was developed. The growth period of Chuanshu 251 was approximately 125 days. The plants exhibited a semi-erect growth habit, and the storage roots were spindle-shaped with red skin and orange-red flesh. The variety was characterized by concentrated root setting and good marketability. The dry matter content, starch content, crude protein content, soluble sugar content, and β-carotene content were 25.30%, 12.90%, 2.02%, 7.41%, and 8.34 mg/100 g fresh weight, respectively, indicating excellent eating quality. Chuanshu 251 showed moderate resistance to black rot and stem nematode disease. In the Sichuan Provincial Regional Trials, the average fresh root yield over two years reached 39 409.50 kg/hm², representing a 24.80% increase compared with the control cultivar. Chuanshu 251 was characterized by high and stable yield, attractive root appearance, superior quality, and wide adaptability. It was officially registered as a national non-major crop variety in 2026 and was suitable for promotion and cultivation as a high-quality table-type sweet potato variety in Sichuan Province and the Southwest Sweet Potato Region of China.

Key words: sweet potato[Ipomoea batatas (L.) Lam.], new variety, Chuanshu 251, high-quality, table-type, breeding, characteristics