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近几年来,我国夏玉米品种选育出紧凑型或理想型品种。这种品种株型紧凑,果穗以上叶片较小并直立,与茎秆夹角小,穗位叶及果穗以下叶片平展,与茎秆夹角也小,适宜密植,有利提高光能利用,一般每亩可增加1000～1500株,比普通型每亩增产200斤左右。不仅使国内夏玉米产量出现了新的突破,显示出我国夏玉米产量的潜力,而且为今后玉米育种奠定了株型育种的新类型目标。
In recent years, China’s summer maize varieties bred compact or ideal varieties. This species is compact plant type, the ear above the smaller and upright leaves, and stems angle is small, spike leaves and ear below the leaves flat, and stem angle is also small, suitable for close planting, will help improve the use of light energy, generally each Mu can increase 1000 ~ 1500 strains, than ordinary type 200 mu per mu yield increase. It not only made a new breakthrough in the production of summer maize in China, but also showed the potential of summer maize production in China and laid a new type of goal of plant type breeding for maize breeding in the future.