作　　者： ; ; ; ; ; ;

机构地区： 海南大学农学院

出　　处： 《中国农学通报》 2011年第27期239-244,共6页

摘　　要： 为探索适合橡胶草基因组DNA的提取方法和RAPD反应体系。采用改良CTAB法提取橡胶草叶片总DNA,得到的DNA能满足RAPD分析需要。通过单因子实验法分析DNA浓度、引物浓度、dNTPs浓度、Taq聚合酶以及Mg2+浓度对RAPD扩增结果的影响,建立了适合于橡胶草RAPD分子标记的最佳反应体系,即20μL体系中包括:模板DNA30ng、TaqDNA聚合酶1.75U、dNTPs浓度0.25mmol/L、Mg2+浓度2.0mmol/L、引物浓度0.5μmol/L、10×PCRBuffer2.0μL。RAPD扩增反应程序为:94℃预变性5min,94℃30s,37℃30s,72℃70s,45个循环,最后72℃延伸7min。该反应体系具有较好的稳定性及可重复性。 The purpose of this study was to obtain the best method for extracting genomic DNA from Taraxacum kok-saghyz Rodin and to establish the best reaction condition of the RAPD amplification system.The high quality genomic DNA of Taraxacum kok-saghyz Rodin could be obtained from young leaves by the improved CTAB method.Some reaction conditions of PCR for RAPD were optimized by setting the gradient with template DNA concentration,primer concentration,dNTPs concentration,Taq DNA polymerase concentration and Mg 2 ＋ concentration through a single factor experiment.And the optimized reaction system and program of RAPD were as follows.The reactions were performed in a volume of 20 μL,which containing 30 ng DNA template,1.75 U Taq DNA polymerase,0.25 mmol/L dNTPs,2.0 mmol/L Mg 2＋,0.5 μmoL/L random primer,2.0 μL 10×PCR Buffer.The RAPD reaction was programmed by 1 cycle for 5 min at 94℃,followed by 45 cycles for 30 s at 94℃,30 s at 37℃,and 70 s at 72℃ and finally,followed by 1 cycle for 7 min at 72℃.The reaction system was reproducible and highly reliable,and it could be effectively for RAPD analysis in Taraxacum kok-saghyz Rodin.

关 键 词： 橡胶草 提取 反应体系

领　　域： [农业科学]