生物技术通报 ›› 2014, Vol. 0 ›› Issue (12): 67-72.doi: 10.13560/j.cnki.biotech.bull.1985.2014.12.011

• 技术与方法 • 上一篇    下一篇

一种适用于RAPD分析的微量山茶DNA提取方法的建立

范晶1 ,李仲芳1,2, 高明辉1 ,伏秦超1   

  1. 1. 乐山师范学院生命科学学院,乐山 614004; 2. 天水师范学院生命科学与化学学院,天水 741001
  • 收稿日期:2014-06-17 出版日期:2014-12-08 发布日期:2014-12-12
  • 作者简介:范晶,男,博士,副教授,研究方向:植物分子生物学;E-mail:fanjing972001@sohu.com
  • 基金资助:
    乐山师范学院科研项目(Z1201),乐山师范学院峨眉山生物多样性保护与利用研究所科研项目(12S01)

Establishment of a DNA Extraction Method Suitable for RAPD Analysis of Trace Arnounts of Camellia japonica L.

1Fan Jing,1,2Li Zhongfang,1Gao Minghui,1Fu Qinchao   

  1. (1. College of Life Science, Leshan Normal University, Leshan 614004; 2. College of Life Science and Chemistry, Tianshui Normal University, Tianshui 741001)
  • Received:2014-06-17 Published:2014-12-08 Online:2014-12-12

摘要: 为建立一种满足 RAPD-PCR 分析的简便且高产率微量山茶基因组 DNA 提取方法,探索了在无液氮条件下,采用简 化试验步骤的改良 CTAB、SDS 和 Triton X-100 方法分别提取山茶新鲜和干燥叶片 DNA,通过光谱扫描和测定 DNA 在波长 230 nm, 260 nm 和 280 nm 时的吸光度,比较不同 DNA 提取方法、材料保存方法以及材料用量对 DNA 提取效率的影响。结果表明,干燥叶 片比新鲜叶片更适合作为 DNA 提取材料,改良 CTAB 法在提取干燥山茶 DNA 时纯度和产率较理想,其 A260/A280 值为 1.595-1.736, 每克叶片可得到 230-295 μg DNA,高质量 DNA 经 RAPD-PCR 扩增可获得清晰扩增条带。100 mg 干燥山茶叶片适合获得高纯度和 高产率的 DNA,增加材料用量可增大 DNA 总量,但也增加了 DNA 中杂质含量。

关键词: DNA, 提取, RAPD, 山茶, 改良, CTAB方法

Abstract: To explore a simple and high yield method for preparing DNA suitable for RAPD analysis, trace fresh and dried leaves of Camellia japonica L. were used as materials. Moreover, the improved CTAB, SDS and Triton X-100 methods without using liquid nitrogen were compared. The efficiencies of different DNA extraction methods, the effects of material preservation and material amounts on DNA qualities were compared based on the absorbance spectrum and ratio of absorbance at 230 nm, 260 nm and 280 nm by Ultraviolet Spectrophotometry. Results showed that dried materials were more suitable for DNA extraction than fresh materials. The improved CTAB protocol for isolating DNA from dried leaf tissues gave satisfied results, with the ratio of A260/A280 ranged from 1.595 to 1.736. Furthermore, the DNA yield reached 230 to 295 μg per gram of leaf. Finally, clear amplified bands were detected by RAPD-PCR. High quality and high yield genomic DNA could be prepared from 100 mg dried leaves of Camellia japonica L., an increase in materials leads to the increased in DNA amount, however, impurity was also increased.

Key words: DNA extraction, RAPD, Camellia japonica L., Improved, CTAB protocol