在高粱不育系选育中，首先是选育优良保持系。保持系的选育通常为保×保，采用系谱法，根据后代表现型进行选择。有的采取先杂交稳定再回交不育化，有的则采取边杂交稳定边回交不育化。两种方法均需大量的人力、物力、财力和时间。并且在回交不育化的时候，对将育成不育系... In sorghum CMS breeding, the first is the selection of excellent maintainer line. Breeding of maintainer lines is usually Paul × Paul, the use of pedigree, according to the descendant phenotype to choose. Some take the first hybrid back to stability and then back to sterile, while others take the side of hybrid stability and backcross. Both methods require a lot of manpower, material and financial resources and time. And back in infertility, will be bred infertility ...