[Objective]The research aimed study the amplification condition of SRAP-PCR of ginseng genome and set up the optimized amplification system/[Method]The effects of template DNA,primer,dNTP mixture and Mg^2＋ on PCR results were discussed.[Result] The optimized amplification procedure was as follows：pre-denaturing at 94 ℃ for 2 min;denaturing at 94 ℃ for 30 s,annealing at 48 ℃ for 30 s and extending at 72 ℃ for 1 min,40 cycles;extending at 72 ℃ for 7 min.The optimum reaction system was as follows：30 ng DNA template,2.0 μM upstream primer and downstream primer,0.3 mM dNTP mixture,2.5 Mm Mg2＋,the total volume was 25 μl.[Conclusion]The optimization amplification system for SRAP-PCR of ginseng was set up,which provided rapid and simplified test methods with good repeatability for SRAP analysis of the genetic relationship and genetic diversity of ginseng.
