›› 2001, Vol. 44 ›› Issue (1): 15-20.

• 研究论文 • 上一篇    下一篇

小菜蛾对杀虫双和杀螟丹抗药性遗传的DNA随机扩增多态性研究

程罗根,李凤良,韩招久,李忠英,陈之浩   

  • 出版日期:2001-02-20 发布日期:2001-02-20

Random amplified polymorphic DNA of resistance to dimehypo and cartap in diamond back moth,Plutella xylostella

CHENG Luo-gen*,LI Feng-liang,HAN Zhao-jiu,LI Zhong-ying,CHEN Zhi-hao   

  • Online:2001-02-20 Published:2001-02-20

摘要: 利用室内选育119代的抗杀虫双和抗杀螟丹小菜蛾Plutella xylostella品系和敏感品系,通过反复回交建立近等基因系。用Operon公司合成的80个引物对抗杀虫双近等基因系和抗杀螟丹近等基因系小菜蛾基因组DNA进行PCR扩增;在抗杀虫双近等基因系中有3个引物分别产生了1条特异扩增带,2个引物分别产生了2条特异扩增带,1个引物产生3条特异扩增带;在抗杀螟丹近等基因系中,有4个引物分别产生了1条特异扩增带,1个引物产生了2条特异扩增带。在培育近等基因系的多次回交过程中,与抗性有关的遗传因子被逐步置换到敏感品系的基因组中,因此可以认为这些特异带与小菜蛾对杀虫双和杀螟丹的敏感性有关。

关键词: 小菜蛾, 杀虫双, 杀螟丹, 随机扩增多态性DNA

Abstract: Two near isogenic lines (NILS) of Plutella xylostella were cultivated by back crossing for 12 successive generations between its resistant and susceptible strains to dimehypo and cartap in the laboratory. DNA from NILS was compared using optimized randomly amplified polymorphic DNA (RAPD) methods.Of the 80 primers tested, 6 primers produced 1 or more special bands in NILS of dimehypo resistance (DR), but none in the susceptible strain,and 7 primers produced 1 or more special bands in NILS of cartap resistance (CR). By repeated back crossing,the gene related to resistance was displaced to susceptible genome.Therefore, it is thought that these special bands throughout the genome in this study are likely to represent 1 or more loci that influence susceptibility to dimehypo and cartap in the diamondback moth.

Key words: Plutella xylostella, dimehypo, cartap, random amplified polymorphic DNA