紧凑型玉米杂交种是株型育种的产物,是近期我国玉米育种工作的新成果,它在利用杂种优势的基础上,通过改良株型,增加单位面积的株数和叶面积,提高了群体光能利用率,使玉米生产量达到了新的水平。紧凑型玉米新组合是由紧凑型玉米自交系组配而成,紧凑型玉米自交系与平展型玉米自交系从本质上讲区别不大,二者在制种的基本技术和要求 Compact corn hybrids are the product of plant type breeding and a new achievement of maize breeding in China recently. Based on the utilization of heterosis, the compact maize hybrids improved the plant type, increased the number of plants per unit area and leaf area, Utilization rates have brought corn production to new heights. Compact new combination of corn is composed of compact maize inbred lines from the compact compact maize inbred lines and essentially flat-type maize in essence, little difference between the two in the seed production of basic technology and requirements