Improved CTAB, high salt precipitation, and high salt and low pH method were employed to extract genomic DNA from the leaves of 3 species of Ziziphus Mill, stored in silica for 15 days and half a year.

• 以硅胶干燥保存15天和半年的枣属植物叶片为试材,分别采用简易CTAB法、高盐沉淀法和高盐低pH法3种方法提取枣属总DNA,通过A_(260)/A_(280)和琼脂糖凝胶电泳对提取的总DNA进行鉴定。