中早熟玉米新品种金穗306选育报告

为了给生产上提供早熟玉米品种，促进甘肃玉米产业的可持续发展。白银金穗种业有限公司于2015年以自交系GE247-6205为母本、GEA10-DE4为父本配制杂交组合，经2 a的品比试验、2 a的甘肃省旱作玉米联合体区域试验、1 a的甘肃省旱作玉米联合体生产试验、1 a的生产示范，选育出了抗旱高产中早熟玉米杂交种金穗306。在2018 — 2019年的甘肃省旱作玉米联合体区域试验中，金穗306平均折合产量为11 741.3 kg/hm2，其中2018年平均折合产量为12 666.0 kg/hm2，较对照品种金穗3号增产3.46%；2019年平均折合产量为10 816.50 kg/hm2，较对照品种德美亚3号增产4.02%。在2019年的甘肃省旱作玉米联合体生产试验中，金穗306平均折合产量为11 232.0 kg/hm2，较对照品种德美亚3号增产4.83%。金穗306出苗至成熟118 d，株高295 cm。果穗筒型，籽粒黄色，马齿型，千粒重318 g。籽粒含粗蛋白93.2 g/kg、粗脂肪47.1 g/kg、粗淀粉722.4 g/kg、赖氨酸2.8 g/kg，容重776 g/L。抗禾谷镰孢茎腐病，中抗禾谷镰孢穗腐病，感丝黑穗病，高感大斑病。适宜在甘肃省春玉米区种植。

Report of Breeding and Selection on A New Mid-Early Maturing Variety of Maize Jinsui 306

To provide mid-early maturing maize variety in the maize production and to facilitate the sustainable development of maize industry in Gansu Province. A new mid-early maturing maize variety Jinsui 306 with drought-resistance and high yield was bred by Baiyin Jinsui Seed Industry Co., Ltd. after years of research. Jinsui 306 is a mid-early maturing maize variety bred by cross combination using inbred line GE247-6205 as female parent and GEA10-DE4 as male parent through several procedures such as comparison trial(2 a), regional trial supervised by dryland maize association in Gansu(2 a), production trial supervised by dryland maize association in Gansu(1 a), and demonstration experiment(1 a). From 2018 to 2019, data from the regional trial supervised by dryland maize association in Gansu showed that the average yield of Jinsui 306 was 11 741.3 kg/ha, the average yield of Jinsui 306 in 2018 was 12 666.0 kg/ha which was 3.5% higher than that of the control Jinsui 3, and the average yield of Jinsui 306 in 2019 was 10 816.5 kg/ha which was 4.02% highger than that of the control Demiya 3. During the production trial supervised by dryland maize association in Gansu in 2019, the average yield of Jinsui 306 was 11 232.0 kg/ha with an increase of 4.83% compared with that of the control Demiya 3. Other agronomic characters of Jinsui 306 such as growth period from seedling to maturity, plant height, shape of ear, color and shape of kernel, and thousand kernel weight are 118 d, 295 cm, tubular type, yellow and horse-teeth shape, and 318 g, respectively. Contents of crude protein, ether exract, crude starch, and lysine in corn kernel are 93.2 g/kg, 47.1 g/kg, 722.4 g/kg, and 2.8 g/kg, respectively, and the kernel density is 776 g/L. Jinsui 306 shows strong resistance in stalk rot caused by Fusarium graminearum, medium resistance in kernel rot disease caused by Fusarium graminearum, but it is susceptible to head smut and highly susceptible to leaf blight. Overall, this new variety is recommanded for spring maize region in Gansu Province.