目前,几种作物的雄性不育系中都发现一种杂株,它们外型酷似不育系,但正常散粉。用它们的花粉授在不育系植株上,所得的杂种1代能够全部或部分散粉;让它们自交,有的后代可以全部散粉,有的则产生育性分离。这证明了它们并不是机械混杂进不育系中的保持系。因此称它为不育系的同型散粉杂株(过去有些同志称它为矮杂株,含义不够确切)。这种杂株在开花前很难与不育系植株区别,而一旦散粉又影响了不育系的纯度和杂交种的制种质量,使一些作物的杂种优势不能得到充分的发挥。因此已越来越引起关 Currently, several crops are found in male sterile lines of a hybrid plant, they look exactly like sterile lines, but normal loose powder. With their pollen on the sterile plant, the resulting hybrids can be all or part of the 1st generation of loose powder; let them self-pollination, and some offspring can all loose powder, and some fertility separation. This proves that they are not mechanical maintainers in the CMS. Therefore, it is called the CMS of the same type of loose powder mixed strains (in the past some comrades called it as a dwarf strain, the meaning is not exact enough). This hybrid is difficult to distinguish from sterile plants prior to flowering, and once the loose powder affects the purity of the CMS and the quality of hybrids, the heterosis of some crops can not be fully exploited. So has caused more and more off