关键词: 小麦, 黄淮冬麦区, 审定品种, 小麦白粉病, 苗期, 基因推导

Abstract:

In order to clarify the resistance level and resistance distribution of approved wheat varieties in the Huang-Huai winter wheat region, using 376 main approved varieties in the Huang-Huai winter wheat region as test materials, the resistance to powdery mildew at the seedling stage was identified and analyzed by artificial inoculation, and the gene postulation of the resistant varieties was carried out according to pedigrees. The results showed that 12 varieties were immune to powdery mildew, 18 were near-immune, 12 were highly resistant, 16 were moderately resistant, 21 were moderately susceptible, and 297 were highly susceptible, of which 58 varieties were moderately resistant or above, accounting for 15.43% of the total. According to the pedigree, gene postulation was conducted for the 58 resistant varieties: four varieties such as Nongda 399 (Pm8); six varieties such as Liangxing 66 (Pm34); Jinhe 9123 and JT176 (Pm8 and Pm21); Yingbo 700 (Pm2 and Pm6); nine varieties such as Jimai 22 (Pm2 and Pm34); three varieties, such as Shi 4185 (Pm8 and Pm34); four varieties such as Liangxing 99 (Pm2, Pm6, Pm34, and Pm52); Zhongmai 8729 (Pm2, Pm21, and Pm34).

Key words: Wheat, Huang-Huai winter wheat region, Approved variety, Wheat powdery mildew, Seedling stage, Genetic derivation