【摘要】 本研究旨在选育高产、稳产、抗倒的玉米品种。利用坚秆耐密美国种质和在黄淮海具有广泛适应性的‘黄瑞’种质作为基础选系材料，采用高密度、大群体、测选相结合的方法，分别选育出具有高产、抗倒特性的自交系‘冀42’和‘冀1877’，并组配出玉米新品种‘冀玉228’。该品种2年区试平均产量为9778.5 kg/hm2，比对照增产6.38%；生产试验产量为9114.0 kg/hm2，比对照品种增产5.8%；增产点率为83.75%，区试倒伏倒折率之和平均为2.3%，生产试验倒伏倒折率之和平均为2.8%。2019年通过国家审定，适宜黄淮海区夏播种植。研究表明，‘冀玉228’融合了美国种质坚秆抗倒和中国种质适应性广的优点，并且具有丰产性好、耐密等特性。同时也探索出一种新的玉米品种选育杂优模式。更多还原

【Abstract】 The aim is to breed maize varieties with high and stable yield and lodging resistant.’Huangrui’was used as the basic breeding material in this study.’Huangrui’possesses American germplasm with strong stem and high-planting dense tolerance, and has extensive adaptability in Huang-Huai-Hai Area. The highplanting density, large population, and combination of test and selection were used to select the two elite inbred lines’Ji42’and’Ji1877’, then the new hybrid variety’Jiyu228’was successfully selected by crossing the two inbred lines. In the 2-year multiple regional tests, the average yield of’Jiyu228’was 9778.5 kg/hm2, which was 6.38% higher than that of the control. In the production tests, the yield of’Jiyu228’was 9114.0 kg/hm2,which was 5.8% higher than that of the control. 83.75% of the test sites showed yield increasing. Meanwhile,the average lodging rate was only 2.3% in the multiple regional tests and 2.8% in the production tests,respectively. In 2019,’Jiyu228’was approved by the National Crop Variety Approval Committee of China for the summer maize cultivar registration in the Huang-Huai-Hai Area. In conclusion,’Jiyu228’integrates the advantages of American germplasm with strong stem and lodging resistance and Chinese germplasm with wide adaptation, and it also has the characteristics of good yield and high-density tolerance. Meanwhile, this study proposes a new heterosis pattern of maize variety breeding.更多还原