一、植物分类学上的类缘关系和不亲和性 一般说来,砧木和接穗在植物分类学上越近缘,即遗传因子越近,亲和性越高.同种内的嫁接有最高的亲和性,同属异种组合素和性稍差,同科异属,除特别的组合外,没有亲和性,不同科的组合,几乎连成活也不能。 这是一般的原则,但也有很多例外。同属 I. Phylogenetic relationships and incompatibility in plant taxonomy In general, the closer the rootstocks and scions are to plant taxonomy, the closer the genetic factors are and the higher the affinity is and the highest grafting within the same species Affinity, belong to the same species heterogeneity and slightly less, with the same family, in addition to special combinations, there is no affinity, the combination of different subjects, almost can not even live. This is a general principle, but there are many exceptions. The same