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近年来,国外作物育种工作有了很大发展,出现了以下几个特点: 1.拟定了新的育种目标:选育品种要求矮生直立,成熟一致,适于机械化生产;株型紧凑,适于高度密植,有利于提高单位面积群体产量;对光照不敏感,适应性广,光能利用率高,产量高,抗病、抗虫或者免疫,品质优良的新品种。
In recent years, great progress has been made in crop breeding in foreign countries. The following features have emerged: 1. A new breeding target has been formulated: breeding varieties require that dwarfs be upright and mature, suitable for mechanized production; It is conducive to improving the yield per unit area of population. It is insensitive to light, has wide adaptability, high utilization rate of light energy, high yield, disease-resistant, insect-resistant or immune, and high quality new varieties.