Dongdan 1 19 Announcement on Examination and Approval of Corn Seeds
ExaminationNo.: Guo Shen Yu 20 15008
Variety name: Dongdan 1 19
Applicants: Liaoning East Asia Seed Industry Technology Co., Ltd. and Liaoning East Asia Seed Industry Co., Ltd.
Breeders: Liaoning East Asia Seed Industry Technology Co., Ltd. and Liaoning East Asia Seed Industry Co., Ltd.
Variety source: F6wc- 1×F7292-37
Examination and approval opinion: This variety conforms to the national maize variety examination and approval standard and has passed the examination and approval. Dongdan 1 19 corn is suitable for spring sowing in Tianjin, northern Hebei, Tongliao, Chifeng, Shanxi, Liaoning and Jilin.
Introduction Experiment of Dongdan 1 19 Maize Seeds
Dongdan 1 19 maize summer sowing is a maize variety with high and stable yield, high quality and density tolerance, disease resistance and lodging resistance, deep axis and small teeth, which is suitable for mechanized harvesting. However, the disadvantage of Dongdan 1 19 corn is that it is not suitable for sowing in the south.
characteristic
① Maturity
Dongdan 1 19 maize emerged and matured in spring maize areas in northeast and north China 124 days, two days earlier than Zheng Dan 958. Dongdan 1 19 corn belongs to middle-late maturing common corn variety, which is suitable for planting in middle-late maturing corn areas with active accumulated temperature above 2800℃ in Liaoning Province.
② Plant types
Dongdan 1 19 maize has a compact plant type, with a plant height of about 283.0 cm, an ear position of about 122.0 cm and about 20 leaves per plant.
③ ear of fruit
Dongdan 1 19 maize varieties have green filaments, light purple anthers and conical ears. Among the bracts, the ear length is about 18.9 cm, the number of rows per ear is 14 ~ 16, the ear axis is red, and the seed yield is 86.2%.
④ Grain
The grain color of Dongdan 1 19 corn is yellow, the middle ear grain type is horse tooth, and the 100-grain weight is 43.1g.
⑤ Inoculation identification
Identification of disease (insect) resistance by artificial inoculation: Dongdan 1 19 maize is resistant to leaf spot, gray spot and head smut, and susceptible to Curvularia leaf spot and stem rot. The lodging rate of this maize variety is 1.9(0.4)%.
⑥ Component analysis
Dongdan 1 19 corn has a bulk density of 756g/L, crude protein content of 9.65%, crude fat content of 3.8 1%, crude starch content of 74.09% and lysine content of 0.33%.
Yield performance per mu
2065 438+03-2065 438+04 participated in the regional test of spring maize varieties in East China and North China. The average yield per mu of Dongdan 1 19 corn was 843.3 kg, which was 2.8% higher than that of the control.
Dongdan 1 19 corn has been put into production for 20 years14 years, with an average yield of 839.8kg per mu, which is 7. 1% higher than that of Zheng Dan 958.
Key points of cultivation techniques
Dongdan 1 19 corn seeds are suitable for planting in plots with medium fertility or above, and the planting density is 4000 ~ 4500 plants per mu from late April to early May. In field management, attention should be paid to the prevention and control of Curvularia leaf spot.