Validation No.: National Validation Jade 2012010
Variety Name: Weike 702
Selection and Breeding Unit: Zhengzhou Weike Crop Breeding Technology Co. Henan Province, 2012 Hebei Province Crop Variety Validation Committee validation
Characteristics: East North China spring corn area 128 days from seedling to maturity, Northwest spring corn area 131 days from seedling to maturity of fertility, the Yellow and Huaihai summer sowing area of 100 days from seedling to maturity, are 1 day later than the control Zhengdan 958. Seedling leaf sheaths are purple, leaf blades are green, leaf margins are purple, anthers are yellow, and glumes are green. The plant is compact, with good green retention, plant height of 252-272 cm, spike position of 107-125 cm, and the number of leaves of the adult plant is 20. The filaments are light purple, and the ears are cylindrical, with a length of 17.8 to 19.5 centimeters, a number of rows of 14 to 18 rows, a white rachis, and yellow, semi-marsh-toothed kernels, with a 100-kernel weight of 33.4 to 39.8 grams. Inoculation identification in the spring corn area of northeast China, resistant to corn borer, moderately resistant to large spot disease, leaf spot disease, stem rot and black scab; inoculation identification in the spring corn area of northwest China, resistant to large spot disease, moderately resistant to small spot disease and stem rot, susceptible to black scab and corn borer, highly susceptible to dwarf foliar disease; inoculation identification in the summer corn area of the Yellow River and Huaihai Sea, moderately resistant to large spot disease and southern rust, susceptible to small spot disease and stem rot, highly susceptible to leaf spot disease and corn borer. Kernel weight 733～770g/l, crude protein content 9.14%～9.64%, crude fat content 3.38%～4.71%, crude starch content 72.01%～74.43%, lysine content 0.28%～0.30%.
Yield performance: 2010 to 2011 to participate in the East North China spring corn varieties regional trials, two-year average yield of 770.1 kg per mu, an increase of 7.2% over the control varieties; 2011 production test, the average yield of 790.3 kg per mu, an increase of 10.3% over the control Zhengdan 958. 2010 to 2011 to participate in the Huanghuaihai summer maize varieties regional trials, the average yield of 617.9 kg per mu, an increase of 10.3% over the control varieties. In 2010 to 2011, participated in the regional test of summer corn varieties in Huanghuaihai, two years' average yield was 617.9 kg per mu, 6.4% higher than the control variety; in 2011 production test, average yield was 604.8 kg per mu, 8.1% higher than the control Zhengdan 958; in 2010 to 2011 participated in the regional test of spring corn varieties in Northwest China, two years' average yield was 1006 kg per mu, 12.0% higher than the control variety; in 2011 production test, average yield was 1001 kg per mu, 12.0% higher than the control Zhengdan 958. Production test in 2011, the average yield of 1001 kg per mu, 8.8% higher than the control Zhengdan 958.
Validation opinion: the variety meets the national corn variety validation standards, through the validation. Suitable for late maturity area in Jilin, Shanxi, Inner Mongolia Tongliao and Chifeng area, Shaanxi Yan'an area, Tianjin City, spring planting; Henan, Hebei Baoding and south of the region, Shandong, Shaanxi Guanzhong irrigation area, northern Jiangsu, northern Anhui summer planting; Gansu, Ningxia, Xinjiang, Shaanxi Yulin, western Inner Mongolia spring planting.