“无性杂种和有性杂种在原则上并无区别。用嫁接方法和用有性杂交的方法一样,都可以将任何性状从一个品种传递到另一个品种………。无性杂种是可塑性极大的材料,这种材料可用栽培条件影响的方法进一步地育成新品种。” “There is no difference in principle between sexless hybrids and sexual hybrids. Grafting can be used to transfer any trait from one species to another, as with sexual crosses.... Asexuals are extremely malleable Of the material, which can be further cultivated into new varieties by cultivation methods. ”