478作为骨干系在玉米制种上已被广泛应用。与之配伍的组合有掖单13、掖单12等。该系生长势旺盛、适应范围广、株型紧凑、配合力高。但其灌浆后期子粒容易发生霉变,由穗顶部开始,子粒变黑发霉,逐渐向下延伸,至收获时可达全穗的1/3左右,发病株数常在90%以上,不仅影响种子质量,而且造成大幅度减产。其防病措施有两个,一是剪苞叶,二是适时收获。 478 has been widely used as a backbone in seed production in maize. The compatibility of the combination of Yeda 13, Yeda 12 and so on. The Department of vigorous growth, to adapt to a wide range of compact plant type, with high. However, the grain at the later stage of grain filling is susceptible to mildew. From the top of panicle, the grains become black and mildew and extend downward, reaching about 1/3 of the whole panicle at harvest, and the number of the disease is often over 90%, which not only affects the seed quality , But also caused a significant reduction in production. The prevention measures have two, one cut leaves, and second, timely harvest.