抗寒性和果实品质都属于数量遗传.目前还不能就桃树抗寒育种进行遗传操纵,但可以对桃果实品质进行遗传操纵.桃果实品质性状由1个或少数主基因控制,即利用主基因分离和转移的方法来操纵果实品质。其方法有二:一是不同 cDNA 基因杂交;二是通过杂交到其他有机体中的同源探针上的方法来分离已知酶的基因. Cold hardiness and fruit quality belong to quantitative inheritance.Nowadays, genetic manipulation can not be conducted on peach-resistant breeding, but peach fruit quality can be genetically manipulated.The peach fruit quality traits are controlled by one or a few major genes, that is, Gene isolation and transfer methods to manipulate fruit quality. There are two ways to do this: one is to cross different cDNA genes; the other is to isolate genes for known enzymes by hybridizing to homologous probes in other organisms.