Yumai 21

The main results are as follows: 1. The variety was selected from the cross (Bainong 791 × Yumai 2) × (Lumai 1 × Yanshi 4) used by the Institute of Agricultural Sciences in Zhoukou area of Henan Province.

2. The main characteristics are semi-winter mid-late maturing varieties. The seedlings are semi-shaped, with good cold resistance, medium tillering ability, 75 cm plant height and strong lodging resistance. The plant type is compact, with rectangular ear, long awn, white shell and white grain, the number of ears per mu is about 400000, the number of grains per ear is 3237, and the weight of 1000 grains is about 42 grams. Protein content 13.3%, lysine 0.39%, wet gluten 29.8%, flour yield 62.5%, unit weight about 800 grams per liter. The leaf has a long functional period, no premature senescence, fast filling speed and good yellowing. Medium resistance to stripe, leaf blight, leaf blight and powdery mildew, susceptible to sheath blight.

3. Yield performance and examination (recognition) set time in 1990, 1991 and 1992 in the regional trial of Dongshui Group in the south of Huang-Huai River, the first in three years and two years, the yield was higher than that of Yumai 2, with an average yield of 411.85 kg per mu in 1990, an increase of 2.9% over that of the control. it was not significant; in 1992, the average yield per mu was 506.85 kg, 1.2% higher than the control, which was not significant. In 1992, the demonstration of high fertilizer production in Henan Province, the average yield per mu was 430.9 kg, ranking first. It was approved by Henan Provincial quality Review Committee in 1992 and by the National quality Review Committee in 1994.

4. the main points of cultivation and the scope of adaptation were sown from October 1 to 15. Use 6-9 kilograms per mu. Heavy application of base fertilizer and combination of nitrogen, phosphorus and potassium. During the jointing stage, topdressing should pay attention to jointing, booting and filling water to control aphids in time. This variety is most suitable for planting in the early and middle crops of middle and high fertility level in the south of Huang-Huai wheat region.

5. The National quality Review Committee approved that the comprehensive character of the variety was better, dwarf resistant to lodging, not premature senescence, good yellowing, quick filling and large ear. Stable grain weight, high yield, cold resistance, dry and hot wind resistance, medium resistance to stripe rust, leaf rust and powdery mildew. After examination, in line with the approval standards, approved and approved. It is suitable for planting in the early and middle cropping areas with high fertility level in the south of Huang-Huai River.