Introduction to the Jimai 20 wheat variety, formerly named 955159

Approval number: National Wheat Approval 2004011

Breeding unit: Crop Research Institute, Shandong Academy of Agricultural Sciences

Variety source: Lumai 14/884187

Provincial approval status: Approved by the Shandong Provincial Crop Variety Approval Committee

Characteristics: Semi-winter, mid-late maturing, maturity 1 day later than the control Shi 4185. Seedlings semi-prostrate, strong tillering ability, purple auricles. Plant height 73 cm, plant type relatively compact, spike layer neat. Spike spindle-shaped, long awns, white glume, white grain, hard texture. Average number of spikes per mu 434,000 spikes, grains per spike 32.3, 1000-grain weight 40.5 g. Lodging resistant, relatively good cold resistance, medium resistance to dry hot wind in the later stage. In the 2001-2002 season cold resistance identification, frost damage grade 3+, overwintering rate 100%; in the 2002-2003 season cold resistance identification, frost damage grade 3, overwintering stems 99.6%. Inoculation disease resistance identification: immune or highly susceptible to leaf rust (resistance segregation), moderately susceptible to stripe rust and sheath blight, highly susceptible to powdery mildew. In 2002/2003 mixed samples were tested respectively: test weight 804/789 g/L, protein content 14.9/14.3%, wet gluten content 34.5/31.6%, sedimentation value 38.1/54.2 ml, water absorption 61.4/56.4%, dough stability time 7.2/28.6 minutes, maximum resistance 325/565 E.U, extension area 77/126 sq cm.

Yield performance: In the 2001-2002 season, it participated in the regional trial of the northern Huang-Huai winter wheat region irrigated land group, with an average yield per mu of 463.3 kg, 0.3% lower than the control Shi 4185 (not significant); in the 2002-2003 season continued trial, average yield per mu 464.7 kg, 0.2% lower than the control Shi 4185 (not significant). In the 2003-2004 season it participated in the production trial, with an average yield per mu of 443.5 kg, 1.1% lower than the control Shi 4185.

Key cultivation techniques: The suitable sowing period is early October. In the middle and late stages, pay attention to the control of stripe rust, sheath blight and powdery mildew.

Approval opinion: After review, this variety meets the national @#@245@#@ variety approval standards and has passed approval. It is suitable for planting in high and medium-yield irrigated fertile land in central and southern Hebei Province, Shandong Province, and northern Henan Province in the northern Huang-Huai winter wheat region.