体细胞无性系变异发生在组织和胚胎的培养，即使没有基因改造，但基因改造往往使情况变得更糟。
Somaclonal variation occurs in tissue and embryo culture even without genetic modification, but genetic modification often makes it worse.
来自抗病无性系的愈伤组织也表现抗病。 愈伤组织抗病性表达受培养基的激素浓度及比例、病原菌的接种量和接种温度影响较大；
The expression of poplar disease resistance in callus tissues is greatly affected by concentration of auxins and cytokinins in the medium, inoculum density and temperature.
体细胞无性系变异是继花粉和花药培养之后的又一种实用化的细胞工程育种新方法。
Somaclonal variation breeding was a new applicable method of cell engineering under breeding after pollen and anther culture.
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