What are the high-yield maize hybrids popularized in production at present?

(1) Zhongdan 2 was bred by the Institute of Crop Breeding and Cultivation of China Academy of Agricultural Sciences. The growth period of spring sowing is about 1 15 days, the plant height is about 250 cm, the plant stems are hard, lodging resistant, head smut resistant, bacterial wilt resistant and leaf spot resistant, and the adaptability is strong. Most corn areas in China can be planted. (2) Agricultural University 60 was bred by China Agricultural University. The growth period of summer sowing is100 ~15 days, the plant height is about 250 cm, and it is resistant to leaf spot, head smut and head smut. It is suitable for spring sowing or wheat field interplanting, and can be planted in high fertilizer and water plots, thin sandy land and light saline-alkali land. (3) Agricultural University 108 China Agricultural University was bred in Beijing on 199 1, and was approved by Beijing and Hebei Crop Variety Approval Committees on 1997 and Tianjin and Shanxi Crop Variety Approval Committees on 1998 respectively. The whole growth period of spring sowing in Beijing is 1.25 days, the plant height is about 260 cm, the stems and leaves are stout, with strong lodging resistance, drought and waterlogging resistance, high and low temperature resistance, good saline-alkali resistance, and high resistance to leaf spot, dwarf mosaic disease, soft rot, head smut and head smut. It can be planted in Beijing, Tianjin, northern Hebei, northwestern Shanxi, Liaoning, Jilin, Gansu, Ningxia and Xinjiang in spring, and can be interplanted in Shijiazhuang, Yunnan and southern Sichuan or used as a summer sowing variety. (4) The breeding of Jingyu 7 was approved by Beijing Academy of Agriculture and Forestry in 2002, and approved by the State and Hebei Province in 2005. In Beijing, Tianjin and Tang areas, the growth period is 94 ~ 98 days, the plant height is 250 ~ 255 cm, the ear position is 103 cm, and it is resistant to leaf spot, leaf spot and dwarf mosaic. Suitable for planting in Beijing, Tianjin and Hebei. (5) Aoyu 3202 was bred by Chengdu Branch of Beijing Olkin Seed Industry Co., Ltd. and passed the national examination and approval in 2005. The growth period in southwest China is112 ~13 days, and the plant type is semi-compact, with plant height of 266 ~ 272 cm and ear height of 10 1 cm. Suitable for planting in Chongqing, Sichuan, Hunan, Yunnan and Guangxi. (6) The seed company of Heilongjiang Agricultural Reclamation Bureau was introduced from KWS Company in Germany in 2000, and passed the examination and approval of Heilongjiang Crop Variety Examination and Approval Committee. Growth period 105 day, plant height 230 ~ 240 cm, ear height about 80 cm, stout stems and mature living stems. It is suitable for planting in the fourth accumulated temperature zone of Heilongjiang Province, the eastern mountainous area of Jilin Province, the northeast of Inner Mongolia Autonomous Region, Bashang area of Hebei Province and the cold area of Shanxi Province. (7) Suiyu 7 was bred by Suihua Institute of Agricultural Sciences, Heilongjiang Province. The growth period is about 108 days, the plant height is 2 10 cm, the ear position is 90 cm, the plant type is flat, the plant root system is developed, and it is resistant to lodging, drought, leaf blight and head smut. It is suitable for planting in the arid area in the west and the low humidity area in the east of the third accumulated temperature zone in Heilongjiang Province. (8) Longdan 16 was bred by Maize Research Center of Heilongjiang Academy of Agricultural Sciences. The growth period is about 1 10 days, the plant height is 270 cm, the ear position is 100 cm, the disease resistance is strong, the early stage is drought-tolerant, and the living stalks are mature. Suitable for planting in the third accumulated temperature zone of Heilongjiang Province. (9) Tong Dan 24 was bred by Tonghua Academy of Agricultural Sciences, Jilin Province, and was approved by Jilin Province and the state in 2000. The growth period of Tonghua, Jilin Province is 1.22 days, the plant height is about 300 cm, the ear height is about 1.27cm, and it is highly resistant to leaf spot, leaf spot and head smut. It is suitable for planting in the upper limit of the first and second accumulated temperature zones in Heilongjiang Province, the middle-late maturing areas in Jilin Province, the middle-late maturing areas in Liaoning Province and the middle-late maturing areas in Inner Mongolia. (10) Breeding of Ji Dan 26 1 Jilin Ji Nong High-tech Development Co., Ltd. was approved by Jilin Province and the state in 2004. The growth period in Northeast China is 126 days, the plant type is compact, the plant height is 300 cm, the ear position is 120 cm, and it is highly resistant to head smut, head smut, leaf blight and stem rot. Suitable for planting in Heilongjiang, Jilin, Liaoning, Tongliao and Chifeng, Inner Mongolia. (1 1) Dongdan No.8 was bred by Liaoning Dongya Seed Industry Co., Ltd., and was approved by Hebei Crop Variety Approval Committee and National Crop Variety Approval Committee in 2000. In the growing period of 132 days in Liaoning, the plant is compact, the stem is stout, the root system is developed, the plant height is about 290 cm, and the ear position is 126 cm, which is highly resistant to stem rot. It is suitable for planting in late-maturing corn areas in southern Liaoning Province and Jilin Province and spring corn areas in North China and Northwest China. (12) Dongdan 60 was bred by Liaoning East Asia Seed Industry Co., Ltd., approved by Liaoning Province in 200 1, approved by the state in 2003, approved by Hunan Province and Anhui Province in 2004 and approved by Shandong Province in 2005. The growth period in Northeast China and North China is 134 days, the plant type is compact, the plant height is 307 cm, the ear position is 125 cm, and it is highly resistant to leaf spot, gray spot and Curvularia leaf spot. Suitable for spring sowing in Liaoning, south of Siping, Jilin, Chengde, Zhangjiakou, Hebei, Beijing, Tianjin, Shanxi and Yan 'an, Shaanxi, and suitable for planting in Hunan, Anhui and Shandong. (13) Shen Dan No.7 was bred by Shenyang Academy of Agricultural Sciences in Liaoning Province. The growth period of summer sowing is110 ~15 days, the plant height is about 240 cm, and it is highly resistant to leaf spot and head smut, lodging and bacterial wilt. Suitable for spring sowing and wheat field interplanting. (14) Shen Dan 10 was bred by Shenyang Academy of Agricultural Sciences. In the growth period of 135 days in Shenyang, the plant height is 280 cm, the ear height is 1 10 cm, the plant type is tower-shaped, and it is highly resistant to leaf spot, head smut, head smut and bacterial wilt. It can be planted in Liaoning, Hebei, Shandong, Beijing, Tianjin, Henan, Shaanxi, Ningxia and Yunnan. (15) Shen Dan 16 Breeding of Shenyang Academy of Agricultural Sciences. Plant height is 266 cm, ear height 1 18 cm. Resistant to maize leaf spot, gray spot and sheath blight, high temperature resistance and mature living stems. It is suitable for planting in northeast, north and northwest spring sowing areas, and also suitable for planting in Huanghuaihai, Beijing-Tianjin-Tangshan summer sowing areas and southwest spring and summer corn areas. (16) Liao Dan 33 was bred by Crop Research Institute of Liaoning Academy of Agricultural Sciences. It was approved by Liaoning Province in 200 1 and passed the national approval in 2003. The growth period is about 1 17 days, the plant type is compact, the plant height is 260 ~ 280 cm, the ear position is about 100 cm, and it is highly resistant to Great Leaf Blight. Suitable for planting in Liaoning, Jilin, Heilongjiang, Chifeng, Tongliao, Inner Mongolia and other places. (17) Liao Dan 565 was bred by Maize Research Institute of Liaoning Academy of Agricultural Sciences and passed the national examination and approval in 2004. The growth period in Northeast China is 126 days, the plant type is compact, the plant height is 276 cm, the ear position is 1 10 cm, and it is highly resistant to head smut, stem rot, Curvularia leaf spot and leaf spot. Suitable for planting in Liaoning, Jilin, Heilongjiang and Tongliao, Inner Mongolia. (18) Dan Yu 13 was bred by Dandong Academy of Agricultural Sciences. Growth period of spring sowing 125 days, summer sowing 1 10 days, plant height of 270 cm, resistance to leaf spot, head smut, corn borer and lodging. Suitable for spring sowing and wheat field interplanting. (19) Benyu No.9 was bred by the Institute of Agricultural Sciences of Benxi Manchu Autonomous County, Liaoning Province, and was approved by the National Crop Variety Approval Committee on 199 1. In Benxi area, the growth period is 120 days, the plant height is 270 cm, the ear position is 100 cm, the stem is tough, lodging-resistant, resistant to corn leaf spot, head smut, stem rot, corn borer, premature aging, mature living stems, drought-resistant, waterlogging-resistant, barren-resistant, and wide adaptability. (20) Dannong No.5 was bred by Hebei Agricultural University, and was approved by Hebei Crop Variety Approval Committee on 1998. Summer sowing/kloc-0.05 days to maturity, plant height 260 cm, ear height 120 cm or so. Suitable for summer live broadcast or package broadcast in Huang-Huai-Hai area, and broadcast in Spring Festival Evening in Northeast China and North China. (2 1) Lu Dan 98 1 is a new maize variety with medium-early maturity and super-high yield bred by Shandong Academy of Agricultural Sciences, which was approved by the National Crop Variety Approval Committee. The growth period of summer sowing is 100 day, the plant height is 280 cm, and the ear position is about 120 cm. It is highly resistant to corn leaf spot, stem rot, rust, rough dwarf disease, smut and bacterial wilt, and has strong drought resistance, lodging resistance, corn borer resistance and mature living stalks. Suitable for planting in summer sowing area of Huang-Huai-Hai Plain. (22) Denghai 1 was bred by Laizhou Academy of Agricultural Sciences, Shandong Province, and was approved by Shandong Crop Variety Approval Committee on 1998. The growth period of summer sowing is about 98 days, the plant height is 250 cm, the ear position is 100 cm, it is highly resistant to lodging, leaf spot and bacterial wilt, and the living stalks are mature. Suitable for summer sowing or interplanting. (23) Denghai 383 1 Shandong Denghai Seed Industry Co., Ltd. passed the national examination and approval in 2005. The growth period in southwest China is115 ~19 days, the plant type is semi-compact, the plant height is 278 ~ 287 cm, and the ear height is115 ~1/kloc-. Suitable for planting in Chongqing, Sichuan, Hunan, Yunnan and Guangxi. (24) Luyu No.2 was bred by Corn Research Institute of Laizhou Academy of Agricultural Sciences, Shandong Province. The growing season is 1 10 days in spring and 100 days in summer. The plant height is 250 cm, the plant type is compact, and the adaptability is strong, so it can be planted in most corn areas in China. (25) Ye Dan 13 was bred by Laizhou academy of agricultural sciences in Shandong province, and 199 1- 1994 was approved by crop variety approval committees in Shandong, Shanxi and Shaanxi provinces. The growth period of wheat field in Huang-Huai-Hai corn region is about 1 10 days, and that in northern spring sowing region is about 135 days. The plant height is 230-250 cm, the ear height is about 85 cm, the living culm is mature, and it is highly resistant to lodging, water liking, fertilizer tolerance, shade tolerance and leaf spot disease. (26) Lu Yu 14 was bred by Shandong Agricultural University. The growth period of summer sowing is about 90 days, the plant height is 230 cm, the plant type is compact, the root system is developed, and it is resistant to leaf spot, brown spot and bacterial wilt. Outstanding characteristics are drought resistance, moisture resistance and lodging resistance, and the yield is significantly improved under the conditions of drought and excessive humidity. (27) Tunliu 1 was bred by the Journal of journal of maize sciences Research Institute of Tunliu Corn Seed Company in Shanxi Province, and was approved by Shanxi Crop Variety Approval Committee in February. The growth period of spring sowing is 127 ~ 13 1 day, and that of summer sowing or continuous sowing is 105 ~ 1 15 days. It is a grain and feed variety with middle-late maturity and high resistance to bacterial wilt, head smut and leaf spot. (28) Shandan 9 1 1 was bred by Grain Research Institute of Shaanxi Academy of Agricultural Sciences and Shaanxi Seed Company, and was approved by Shaanxi Province on 1995. The growth period is 95 ~ 1 13 days in summer and 120 ~ 129 days in spring. The plant height is 234 cm and the ear height is 96 cm. It has good drought resistance, lodging resistance and high temperature resistance, and is resistant to leaf blight, leaf spot, head smut and bacterial wilt. Suitable for planting in Shaanxi province and surrounding areas, with moderate fertilizer and water. (29) Zheng Dan 958 was bred by the Institute of Grain Crops of Henan Academy of Agricultural Sciences on 1996, and was approved by the National Crop Variety Approval Committee in 2000. This is a moderately mature compact corn variety. The plant height is about 24 1 cm, and the ear height is about 104 cm. Resistant to leaf spot, smut and rough dwarf disease, and highly resistant to dwarf mosaic and lodging. The suitable planting area is wide, and it can be planted in the northern spring corn area and the Huang-Huai-Hai plain summer corn area. (30) Shanjun 20 was bred by Xunxian Agricultural Science Research Institute of Henan Province, and was approved by the state, Henan Province and Hebei Province in 2003. The growth period of summer sowing is 97 days, the plant height is 242 cm, the ear position is 106 cm, and it is highly resistant to dwarf mosaic disease. Suitable for planting in summer maize areas in Henan, central and southern Hebei, Shandong, Shaanxi, Jiangsu, Anhui and Yuncheng, Shanxi. (3 1) Yayu 12 corn research and development center in Ya 'an City, Sichuan Province, bred, 200 1 passed the examination and approval of Sichuan Province and the national examination and approval in 2003. The growing season is about 103 ~ 133 days in spring and 100 days in summer. Semi-compact plant type, plant height 240 ~ 300 cm, ear position 90 ~ 140 cm, mature living stalks, good lodging resistance, high resistance to stem rot, head smut and dwarf disease. Suitable for planting in Sichuan, Chongqing, Guizhou, Yunnan, Guangxi, Hubei, Hunan spring corn areas and Henan, Hebei, Shandong, northern Jiangsu, northern Anhui, Shaanxi, Shanxi Yuncheng summer corn areas. (32) Eyu 10 was bred by Shiyan Institute of Agricultural Sciences, Hubei Province, and 1999 was approved by Hubei Province, and passed the national approval in 2000. The growth period of spring sowing in southwest China is about 12 1 day, the plant type is semi-compact, the plant height is about 260 cm, and the ear position is about 100 cm, which is highly resistant to stem rot. It is suitable for single cropping or intercropping in the southwest corn area in spring, or plastic film mulching cultivation or seedling transplanting. (33) Zunyu No.8 was bred by Zunyi Seed Company in Guizhou Province, and was approved by Guizhou Province in 2003 and the State in 2005. The growth period is115 ~119 days in southwest China and 125 days in Wuling Mountain area. The plant type is semi-compact, with a plant height of 273 cm and an ear position of 1 17 cm. Suitable for planting in Guizhou, Chongqing, Sichuan, Hunan, Hubei and Yunnan. (34) Yudan No.8, bred by Chongqing Agricultural Science Research Institute, passed the examination and approval of Chongqing in 2002 and the national examination and approval in 2005. In southwest China, the mature period is 1 16 ~ 122 days, the plant type is semi-compact, the plant height is 270 cm, the ear height is 1 17 cm, and it is resistant to sheath blight. Suitable for planting in Chongqing, Hunan, Hubei, Guizhou, Sichuan, Yunnan and Guangxi. (35)SEAO 4 was bred by the Institute of Grain Crops of Jiangsu Academy of Agricultural Sciences. The growth period of summer sowing is about 95 days, the plant height is 235 cm, and it is resistant to leaf spot and waterlogging. Suitable for planting in northern Jiangsu and southern provinces (autonomous regions). (36) Wan Yu 1 1 was bred by Anhui Huaihe Seed Industry Co., Ltd. and Suzhou Academy of Agricultural Sciences, and was approved by Anhui Province in 2004 and Shandong Province in 2005. The growing period in spring is 120 days, and in summer it is 98 days. The plant height is about 250 cm, the ear height is 89 ~ 1 10 cm, the living culm is mature, and it is highly resistant to big leaf spot, small leaf spot, dwarf mosaic, smut and bacterial wilt. Suitable for spring sowing, summer direct sowing or interplanting in Anhui and Shandong. (37) Huidan No.4 was bred by Huize Agricultural Technology Extension Center of Yunnan Province and Corn Room of Yunnan Academy of Agricultural Sciences on 1988. Growth period 126 days, strong drought resistance, resistance to leaf spot, rust, dwarf mosaic, ear rot and bacterial wilt. It can be planted under different conditions in Yunnan Province.