Excellent Wheat Variety - Yumai 21

(1) The source of the variety was selected from the cross of the agricultural science department of Zhoukou District, Henan Province (Benong 791 Yumai No. 2) (Lumai No. 1 Yanshi No. 4). (2) The main characteristic features are middle-late and late-maturing varieties. Half-shaped seedlings, good cold resistance, medium tillering power, plant height 75 cm, strong lodging resistance. Compact plant type, ear, rectangular, long awn, white shell, white grain, about 400,000 acres of ears, grains of 32 to 37 grains, about 42 grams of grain weight. Protein content was 13.3%, lysine 0.39%, wet gluten 29.8%, powder extraction rate 62.5%, and the bulk density was about 800 grams per liter. The leaf has a long functional period, does not have premature aging, has a fast grout, and has a good yellowing effect. In the bar, leaf rust, leaf blight and powdery mildew, senile sheath blight. (3) Production performance and review (recognition) time 1990, 1991, 1992 In the regional test of winter water in the Huanghuai South piece, the three-year test was the first in two years, and the yield was higher than that of the control Yumai No. 2. In 1990, the average mu was The yield of 411.85 kilograms was 2.9% more than the control, which was not significant. In 1992, the average yield was 506.85 kilograms, an increase of 1.2% over the control, which was not significant. In 1992, the high-fertilizer production demonstration in Henan Province, with an average yield of 430.9 kg, ranked first. It was approved by the Henan Provincial Quality Examination Committee in 1992; (4) Cultivation points and adaptation scope Seed sowing on October 1~15. Use 6 to 9 kg per acre. Reapply base fertilizer, with nitrogen, phosphorus and potassium. During the jointing stage of top-dressing, pay attention to pouring section, booting and grout, and prevent and cure ear blast. This variety is most suitable for planting mid-upper fertility levels in the south of Huanghuai Mai District. (5) The national product review meeting approved opinion that the comprehensive traits of the variety is better, dwarf resistance, not premature aging, good yellowing, rapid filling, large spikes. Grain weight stability, high yield, cold, dry hot wind, resistance to stripe rust, leaf rust and powdery mildew. After the audit, it meets the validation standards and is approved. It is suitable for planting in early, middle and high-lying areas of middle and upper levels of fertility in Huanghuai South.

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