“核代换”通过杂交和多次回交,把一个亲本的细胞核的遗传物质基本上换成另一个亲本的遗传物质,这种方法叫做“核代换”。“核代换”可以保持甲品种的某一特牲,而使其他性状都和乙品种相似,这是育种工作中选育抗病、抗虫品种,改良品质,改进抗逆性等常用的一种方法,在杂种优势利用的研究中,可以用核代换的方法改造不育材料。 “Nuclear substitution” By crossing and multiple backcrossing, the genetic material of one parent’s nucleus is essentially replaced by the genetic material of another parent. This method is called “nuclear substitution.” “Nuclear substitution” can maintain a particular species of A species, leaving other traits similar to B species, which is breeding one of the commonly used breeding disease resistance, insect resistance varieties, improve quality, improve resistance, etc. In the study of the utilization of heterosis, we can transform the sterile material by means of nuclear substitution.