植株再生体系的建立是进行基因转化的前提。
The establishment of regeneration system for tall fescue is the foundation for its transformation.
由此可见，不同激素浓度配比的培养基再生体系的建立影响不同。
So culture medium having different concentration ratio have different effect on regeneration system establishment.
棉花体细胞培养再生体系的建立对棉花遗传改良及其生物工程具有重要意义。
The somatic embryogenesis system of cotton affords an important role for genetic improvement and bioengineering.
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