【Objective】This study aimed to screen and clone cytoplasmic male sterility(CMS)related gene of heading Chinese cabbage.【Method】The cDNA-AFLP technology was used to screen and identify differentially expressed gene from male sterile flower bud and male fertile flower bud deprived from the hybrids of male sterile line 06J45 and its restorer line 01S325-1.Then RACE was used to clone the selected gene,the bioinformatics analysis was done to analyze its sequence and qRT-PCR was used to detect its expression.【Res...