Variety name: Zhongke 1 1
Breeding units: Beijing Zhongke Huatai Technology Co., Ltd. and Henan Ketai Seed Industry Co., Ltd.
Variety source: female parent CT03, from (Zheng 58×CT0 1)× Zheng 58; The male parent CT20 1 comes from Huangzao 4× Huang 168.
Characteristics: It takes 98.6 days from emergence to maturity in Huanghuaihai area, which is 0.6 days later than the control Zheng Dan 958 and 4 days earlier than Agricultural University 108. The effective accumulated temperature is about 2650℃. Seedlings have purple leaf sheaths, green leaves, purple leaf margins, dense branches of male spikes, pale purple anthers and green glumes. Compact plant type, wide and upward leaves, plant height of 250 cm, spike height 1 10 cm, number of leaves 19 ~ 2 1. The filament is light red, the spike is barrel-shaped, the spike length is 16.8cm, the rows per spike are 14 ~ 16, the spike axis is white, the grain is yellow, and the 100-grain weight is 31.6g. ..
After two years' inoculation and identification by hebei academy of agriculture and forestry Institute of Plant Protection, it is highly resistant to dwarf mosaic disease and stem rot, and moderately resistant to big leaf spot, small leaf spot, smut, corn borer and Curvularia leaf spot. Tested by the Grain Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture (Beijing), the bulk density of grain is 736g/L, the crude protein content is 8.24%, the crude fat content is 4. 17%, the crude starch content is 75.86%, and the lysine content is 0.32%.
Yield performance: In 2004-2005, he participated in the regional test of summer maize varieties in Huang-Huai-Hai, with an increase of 42 points and a decrease of 6 points. The average yield per mu in the two-year regional trial was 608.4 kg, which was 65438 00.0% higher than that in the control. In the production test in 2005, the average yield per mu was 564.3 kg, which was higher than the local control 10. 1%.
Key points of cultivation techniques: the suitable density per mu is 3800 ~ 4200 plants, and attention should be paid to the prevention and control of Curvularia leaf spot.
Examination and approval opinion: This variety conforms to the national maize variety examination and approval standard and has passed the examination and approval. Suitable for planting in summer maize areas of Hebei, Henan, Shandong, Shaanxi, northern Anhui, northern Jiangsu and Yuncheng, Shanxi.