RNA interference(RNAi) is a powerful gene tool targeting post-tra- -nscriptional gene silencing, which has recently been used to silence gene expression in various species.

• RNA干扰(RNAi)是一种转录后基因沉默(Post-transcriptional gene silence,PTGS)的基因阻断技术,近年来被广泛应用于哺乳动物细胞抑制基因表达。