Jimai 21 (formerly known as 988044)

Variety source: 865186 / Sichuan Agricultural University 84-1109Universe / Ji 84-5418

Characteristics: semi-winter, middle maturity, mature stage and control stone 4185 at the same time. The seedlings are semi-creeping, the leaves are light green, the leaves are slender and the tillering ability is strong. The plant height is 75 cm, the plant type is slightly loose, the flag leaf is washed up, and the ear layer is neat. Spike spindle type, long awn, white shell, white grain, keratin. The average number of ears per mu is 384000 ears, the number of grains per ear is 34.1g, and the weight of 1000 grains is 40.3g. It is more resistant to lodging and cold resistance. The identification of cold resistance in 20002-2003 showed that the freezing injury was 3% +, the overwintering stem was 98.2%, the dead stem rate was 1.8%, the freezing injury was 3% + grade, the dead stem rate was 38%, and the overwintering stem was 62%. Inoculation resistance identification: stem rust immunity, slow stripe rust, moderately susceptible sheath blight, powdery mildew, leaf rust. In 2003 / 2004, the mixed samples were measured respectively: bulk weight 778 grams / liter, protein content 15.2 percent, warm gluten content 33.0 percent, sedimentation value 32.5 cusps 30.7 milliliters, water absorption 58.1 cusp 60.3 percent, dough stability time 5.4ax 3.8 minutes, maximum extension resistance 226/172E.U, stretching area 42 hectare 32 square centimeters.

Yield performance: the average yield per mu was 494.47 kg, which was 6.1% higher than that of Shi 4185 (significant) in 2002-2003. in 2003-2004, the average yield per mu was 498.6 kg, 4.7% higher than that of Shi 4185 (not significant). The average yield per mu in the production test in 2003-2004 was 475.91 kg, 6.1% higher than that of the control Shi 4185.

Key points of cultivation techniques: the suitable sowing date is the first ten days of October, and there are 10-150000 basic seedlings per mu. The sowing rate of high-yield fields should be reduced appropriately. Pay attention to the prevention and control of powdery mildew and leaf rust in the middle and later stage.

Approval opinion: after examination, the variety conforms to the national variety approval standard and has passed the examination and approval. It is suitable to be planted in the north of Huang-Huai winter wheat region in the central and southern part of Shanxi Province, the central and southern part of Hebei Province, Shandong Province and the north of Henan Province.