RNA interference (RNAi) is a post-transcriptional gene silencing induced by introduction of double-stranded RNA(dsRNA). It is a powerful tool for silencing gene expression.

• RNA干扰(RNA interference,RNAi)是由双链RNA(double-stranded RNA,dsRNA)引发的转录后基因沉默机制(post-transcriptional gene silencing,PTGS),它是沉默基因表达的一个十分有效的手段。