不亲和性是远缘杂交的三大障碍之一。如何克服这一障碍就成为远缘杂交工作中需要解决的问题。远缘杂交的不亲和性,主要是由于受精过程存在困难而引起的。有的父本花粉,不能在母本柱头上萌发;有的虽能萌发,但不能伸入胚囊;有的萌发后能伸入胚囊,但在伸入过程中又往往夭折。因此,首先就要研究促进柱头、胚囊与花粉管的发育相适应,使之精卵结合,部分DNA达到亲和。笔者多年采用激素处理柱头授粉法,对克服不亲和性进行初步探讨,并观察其杂交后代的变异情况,现将结果简报如下: 试验以红410,清江七十日早,7055等21个品种及军协A,珍汕A为母本;高梁、 Inconsistency is one of the three major barriers to distant hybridization. How to overcome this obstacle has become a problem to be solved in distant hybridization work. The incompatibility of distant hybridization is mainly due to the difficulties in the fertilization process. Some parents of pollen, germination can not be in the stigma of the mother; some although germination, but can not extend into the embryo sac; some after germination can be inserted into the embryo sac, but in the process of extending often untimely. Therefore, we must first study to promote the stigma, embryo sac and pollen tube development to adapt to the sperm-egg binding, part of the DNA to reach affinity. The author for many years by the hormonal treatment of stigma pollination, to overcome the incompatibility of a preliminary study and observe the variation of their offspring hybridization, the results are as follows: The test to red 410, Qingjiang seventy days early, 7055 and other 21 varieties And A, Jinshan A as female parent; sorghum,