以红花石蒜叶片基因组DNA为模板,分析了模板DNA、引物、dNTPs、Mg2+的浓度及Taq DNA聚合酶的用量对ISSR-PCR扩增结果的影响。建立了石蒜ISSR分析最优化的反应体系及应用程序:即25μL反应体系中,有20 ng模板DNA、0.5μmol.L-1随机引物、150μmol.L-1dNTPs、2.0 mmol.L-1Mg2+、1.0 U Taq DNA聚合酶。反应程序为:94℃预变性5 m in;然后45个循环:每个循环94℃变性45 s,55℃退火60 s,72℃延伸2 m in;循环结束后72℃延伸7 m in。
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