摘要： 提取高质量线粒体DNA(mtDNA)是研究大白菜细胞质雄性不育系不育分子特性的前提。以大白菜绿色叶片为试验材料，应用一种省时、简便、操作步骤少的方法，快速获得3组11份大白菜的mtDNA(包括保持系、Ogu CMS、Pol CMS和CMS9细胞质雄性不育系)。试验中不需要加入DNase Ⅰ酶消化核DNA，提取的mtDNA质量较好；同时，采用RAPD技术，对11份大白菜mtDNA进行多态性分析，获得了与大白菜Ogu CMS和CMS9不育系相关的差异片段10条，与大白菜Ogu CMS不育系相关的差异片段3条。初步证实：大白菜CMS9和大白菜Ogu CMS不育系既有相似性又存在差异性。

关键词: 大白菜, 细胞质雄性不育, mtDNA, 提取, RAPD

Abstract: Isolation mitochondrial DNA (mtDNA) is the first step for studying molecular characteristics in cytoplasmic male sterile Chinese cabbage (Brassica campestris L. ssp. pekinensis). A simple and economical method was introduced in this article. Green leaves were used without adding DNase I enzyme to eliminate nuclear DNA in it. 11 mtDNAs in Chinese cabbage (including maintainers and 3 cytoplasmic male sterilities: Ogu CMS, Pol CMS and CMS96) were isolated by it. Meanwhile, through RAPD technique, 10 special fragments linked to Ogu CMS and CMS96 were found. 3 special fragments linked to Ogu CMS were found. It primarily proved that the male molecular characteristics of Ogu CMS and CMS96 in Chinese cabbage had similarities as well as differences.

Key words: Chinese cabbage, Cytoplasmic male sterility, mtDNA, Isolation method, RAPD

中图分类号: 

• S634.1