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利用ＲＡＰＤ技术对芥菜（ＢｒａｓｉｃａｊｕｎｃｅａＣｏｓ．）１６个变种的遗传变异进行研究。从６０个随机引物中筛选出２７个有效引物，共扩增出３３６条ＤＮＡ带，其中２７５条为多态性带，占８１８５％，平均每个引物扩增的ＤＮＡ带数为１２４４条。利用１９个有效引物扩增的２４０条ＤＮＡ带对芥菜１６个变种间的亲缘关系进行ＵＰＧＡ聚类分析，计算出１６个变种间的平均遗传距离为７３４，在此基础上建立了中国菜用芥菜１６个变种的ＤＮＡ分子系统树图。该系统将芥菜的１６个变种划归Ａ、Ｂ、Ｃ三个组，其中Ａ组７个变种，Ｂ组８个变种，Ｃ组只有１个变种，Ｂ组又可细分为两个亚组。对芥菜遗传多样性的分子基础进行了探讨。
The genetic variations of 16 varieties of Brassica juncea (Coss.) Were studied by RAPD technique. 27 effective primers were screened out from 60 random primers, 336 DNA bands were amplified, of which 275 were polymorphic, accounting for 8185%, with an average of 12 DNA bands per primer. 44 articles. Using 240 DNA bands amplified by 19 effective primers, we analyzed the genetic relationship among 16 varieties of mustard by UPGA cluster analysis, and calculated the average genetic distance between the 16 varieties as 734, on this basis, established Chinese food Tree molecular map of 16 varieties of mustard. The system will be 16 varieties of mustard under the A, B, C three groups, of which A group of seven varieties, B group of eight varieties, C group only one variant, B group can be subdivided into two subgroups . The molecular basis of genetic diversity in B. juncea was discussed.