YW S血缘玉米自交系昌 7 2是运用相同雄亲交叉巢式遗传设计的选育技术 ,导入亚热带玉米种质 ,经安阳市农业科学研究所内、海南连续 7个世代交替培育而成 ,目前国内育种单位利用该自交系已育成 1 0多个通过国家审定、省审定的优良新杂交种。在全国推广应用面积达 70 0万hm2 。获得了显著的经济效益和社会效益 YW S blood maize inbred lines Chang 7 2 is the use of the same maternal cross-nest genetic design of breeding technology, the introduction of subtropical maize germplasm, Anyang Institute of Agricultural Sciences, Hainan, seven consecutive generations of alternating cultivation, the current domestic Breeding units using the inbred lines have been bred more than 10 through the national validation, the provincial validation of fine new hybrids. In the country to promote the application area of ​​70 million hm2. Obtained significant economic and social benefits