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山东省80～90年代推广的主要玉米杂交种的系谱是以黄早4、M_(017)、8112、330和E_(28)等骨干自交系及其衍生系为主,与其他自交系杂交,形成了较大的品种系谱群。这些玉米杂交种对玉米生产起了很大推动作用。系谱分析还表明美国种质对山东省的玉米育种效果影响较大。今后要改进育种方法,提高育种效率,选育推广紧凑大穗型玉米杂交种,进一步加大密度,使玉米产量再上一个新台阶。
The pedigree of the main maize hybrids popularized in Shandong Province during the 1980s and 1990s was mainly composed of Huangzao 4, M_ (017), 8112, 330 and E_ (28) and other derived inbred lines and other inbred lines Hybrids, forming a larger breed pedigree group. These maize hybrids play a big role in promoting corn production. Pedigree analysis also showed that the American germplasm has a great effect on maize breeding in Shandong Province. In the future, we should improve breeding methods, improve breeding efficiency, breed and popularize compact, large-spike corn hybrids and further increase density to bring maize production to a new level.