Abstract: With the inbred line Aijiaohuang 97．3．2 of Chinese cabbage．pak．choi(Brassic“ca，npestr s L
．
ssp．chinensis Makino CV．Aijiaohuang)the inbred line Baimanjing 001．24 of turnip[B．c血Ⅲ，)e fris L
． ssp．
Fa(Matzg．)Sinsk CV．Baimanjing] and their hybrids as experimental material，differentia1 g e expres．
slon patterns at rosette stages were analyzed by using cDNA—AFLP． Four types of difierential gene exDress1’0n
patterns were detected between hybrid and their parents：bands observed only in F】not in parents(UNF 1)：
bands observed in both parents but not in Fl(ABF1)；bands observed only in one parent but not in F． and
another parent (UNP)；bands observed in one parent and F】not in another parent (DMP)．

Key words: Chinese cabbage—pakchoi, Turnip, Brassica campestris, Brassic血rap血, Hete r(1sis：cDNA．AFLP, Differential gene expression patterns