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What are the high-quality protein corn varieties popularized in current production?
(1) Agricultural University 107/02 was bred by China Agricultural University, and 199 1 was recognized by Shanxi Province. The growth period of spring sowing is 120 ~ 130 days, and that of summer sowing is 98 ~ 107 days. The lysine content of grain was 0.45%. Suitable for re-sowing in Yuncheng area of Shanxi Province and spring sowing in central area. (2) Zhongdan 9409 was bred by the Institute of Crop Breeding and Cultivation of China Academy of Agricultural Sciences and passed the examination and approval on 1996. The growing period in Beijing is about 120 days. The lysine content of grain is about 0.42%. This variety has wide adaptability. Jilin, Hebei, Shanxi, Inner Mongolia, Ningxia, Gansu and Xinjiang can be sowed in spring, Shandong, Henan, Anhui, Jiangsu and Shaanxi can be sowed in summer or interplanted, and Sichuan, Yunnan, Guizhou and Guangxi can be sowed in spring or autumn. (3) Changdan was bred by Changchun Academy of Agricultural Sciences in Jilin Province and approved by 1994. It takes about 128 days from emergence to maturity. The lysine content in grain was 0.465438 0%. Suitable for planting in western Jilin, Jincheng, Shanxi, Shihezi, Xinjiang and Chifeng, Inner Mongolia. (4) Changdan 604 was bred by Changchun Academy of Agricultural Sciences in Jilin Province. It takes about 128 days from emergence to maturity. The lysine content of grain is 0.4%. Suitable for planting in middle and late maturity areas of spring sowing corn. (5) Gao Yu 1 was bred by Shenyang Agricultural University and passed the examination and approval on 1990. The growth period is about 120 days. The lysine content of grain was 0.44%. It is suitable for planting in the west, north-central Liaoning Province and southern Jilin Province, and can also be planted in the Huanghuai River Basin in summer. (6) Gao Yu No.3 was bred by Shenyang Agricultural University and passed the examination and approval on 1994. The growth period is about 125 days. The lysine content of grain is 0.45%. It is suitable for planting in Liaoning Province and southern Jilin Province, and can also be planted in the Huanghuai River Basin in summer. (7) Bengao No.4 was bred by Benxi Agricultural Science Research Institute of Liaoning Province, and was approved by 1998. The growth period is about 1 16 days. The protein content in grain was 10.34%, and the lysine content was 0.5%. It is suitable for planting in mid-mature areas in Liaoning, Jilin and Heilongjiang provinces. (8) Tiegaonuo. 1 was bred by Tieling Institute of Agricultural Sciences, Liaoning Province, and passed the examination and approval on 1998. The growth period is about 126 days. Protein content is 8. 15%, and lysine content is 0.4%. Suitable for planting in central and southern areas of Liaoning and Jilin. (9) Luyu 13 was bred by Maize Research Institute of Shandong Academy of Agricultural Sciences and passed the examination and approval on 1993. The growth period of spring sowing and summer sowing in Jinan is about 1 10 and 92 days respectively. The lysine content of grain is 0.4%. Suitable for planting in Shandong, Hebei, Henan, Shanxi, Shaanxi, Sichuan and other places. (10) Cheng Dan 20 1 was bred by Institute of Crop Cultivation and Breeding, Sichuan Academy of Agricultural Sciences, and was approved on 1995. Spring sowing in Chengdu, the growth period is about 1 15 days. The lysine content of grain was 0.43%. Suitable for planting in flat dams, shallow hills and similar ecological areas in Sichuan Basin. (1 1) Xinyu No.7 was bred by Institute of Grain Crops, Academy of Agricultural Sciences, Xinjiang Uygur Autonomous Region, and passed the examination and approval on 1993. It takes 126 ~ 128 days from emergence to maturity. The lysine content of grain was 0.39%. In addition to Xinjiang, Gansu and Heilongjiang can be planted. (12) Xinyu 10 was bred by Institute of Grain Crops, Academy of Agricultural Sciences, Xinjiang Uygur Autonomous Region, and passed the examination and approval on 1998. The time from emergence to maturity is 102 ~ 103 days in northern Xinjiang and 82 ~ 90 days in southern Xinjiang. The lysine content of grain was 0.42%. Suitable for planting in cold Liangshan area, besides Xinjiang, there are Gansu, Hebei, Inner Mongolia, Jilin and other places.