1978年以来,作者坚持了以超黄早_4为主要目标的早熟硬粒型玉米自交系选育研究,取得的主要成果为H_(21)。用H_(21)取代烟单14号、鲁玉2号、掖单4号等组合中的黄早_4亲本,均比原组合表现优越,取代西玉3号中的“502”亲本,F_1产量也有所提高。H_(21)选育成功的关键,一是选用中国和美国玉米品种资源来组配优缺点互补的基本材料;二是紧扣育种目标,加大选择压力,采用骨干系测交,迅速育成了超标的新杂交种。 Since 1978, the author has insisted on the breeding of early-maturity durum maize inbred lines with the main goal of “Super-Huangzao-4”. The main achievement obtained is H_ (21). The substitution of H_ (21) for Huangzao_4 parents, such as Yudan14, Luyu2 and Yedan4, was superior to the original combination, replacing “502” of Xiyu No.3 with F_1 Production also increased. The key to the success of H_ (21) breeding is to select maize varieties resources from China and the United States for the compilation of basic materials with advantages and disadvantages of each other. Second, close to breeding objectives, increasing selection pressure, Exceeded new hybrids.