中文摘要：

采用单因子试验与正交试验的方法，研究了海南龙血树（Dracaena ccnnbodiana PierreexGagnep）ISSR-PCR反应体系中的主要影响因子，筛选出16条有效引物并优化了它们的退火温度，此外还检测了体系的重复性。优化后的25斗L反应体系包含：10χPCR buffer 2．5μL，3．0mmol／LMgCl2，300μmol／LdNTPs，Taq聚合酶3.0 U引物0．2μmol／L，DNA模板20ng。该反应体系可用于海南龙血树的遗传多样性和遗传结构的分析。

英文摘要：

The influence factors of ISSR PCR for Dracaena cambodiana Pierre ex Gagnep were studied by using single factor test and orthogonal design, and a set of ISSR PCR reaction system was established. Sixteen ISSR primers were selected out, and their annealing temperatures were also optimized. Furthermore, the optimized reaction conditions were examined for its repeatability in D. cambodiana. The optimum ISSR PCR reaction system with total 25 μL reaction solution contain 2.5 μL 10 x PCR buffer, 3.0 mmol/L MgCl2, 300 Izmol/L dNTPs, 3.0 U Taq polymerase, 0.2 μmol/L primers, and 20 ng DNA template, which can be used for analysis in genetic diversity and genetic structure of D. cambodianas.