›› 2014, Vol. 41 ›› Issue (12): 30-33.

• 生物技术 • 上一篇    下一篇

3种兔艾美耳球虫rDNA ITS序列测定与系统进化分析

许家园1, 廖贵城2, 胡会朋1, 陈晓珍1, 刘丽丹2, 吴松明2, 温远辉2, 刘园2, 翁亚彪1, 林瑞庆1   

  1. 1. 华南农业大学兽医学院, 广东广州 510642;
    2. 佛山正典生物技术有限公司, 广东佛山 528138
  • 收稿日期:2014-08-04 出版日期:2014-12-20 发布日期:2014-12-25
  • 通讯作者: 林瑞庆 E-mail:rqlin@scau.edu.cn
  • 作者简介:许家园(1988-),男,安徽人,硕士生,研究方向:兽医寄生虫学.
  • 基金资助:
    广东省科技计划项目(2012A020100001).

Sequence and Phylogenetic Analysis of rDNA ITS of Three Eimeria Species in Rabbit

XU Jia-yuan1, LIAO Gui-cheng2, HU Hui-peng1, CHEN Xiao-zhen1, LIU Li-dan2, WU Song-ming2, WEN Yuan-hui2, LIU Yuan2, WENG Ya-biao1, LIN Rui-qing1   

  1. 1. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China;
    2. Foshan Standard Bio-Tech Co., Ltd., Foshan 528138, China
  • Received:2014-08-04 Online:2014-12-20 Published:2014-12-25

摘要: 为研究内转间隔区(ITS)序列能否作为鉴别不同种兔球虫的分子标记,本试验以兔肠艾美耳球虫、黄艾美耳球虫和大型艾美耳球虫为研究对象,对其核糖体DNA(rDNA)ITS全序列进行PCR扩增,扩增产物纯化后连接至pGEM-T Easy载体上,重组质粒通过菌液PCR鉴定后测序,将测序结果与GenBank中公布的兔球虫ITS序列进行同源性比对,用Mega 5.0绘制系统进化树.结果显示,兔肠艾美耳球虫、黄艾美耳球虫和大型艾美耳球虫ITS序列长度分别为1065、1009和1047 bp,与GenBank公布的同种球虫相应序列同源性分别为99.2%、99.0%和94.5%,与其他种球虫序列的同源性为55.3%~82.1%.系统进化树显示兔球虫ITS序列形成单系群,该单系群又根据卵囊外残体的有无分为2个亚群.研究结果表明ITS序列种内同源性高于种间同源性,可作为3种兔球虫种间鉴定的分子标记.

关键词: 肠艾美耳球虫; 黄艾美耳球虫; 大型艾美耳球虫; rDNA ITS; 序列分析; 系统进化分析

Abstract: In order to study whether the internal transcribed spacers (ITS) sequence could be used as a molecular marker for the species identification of rabbit coccidian, the rDNA ITS of Eimeria intestinalis, Eimeria flavescens and Eimeria magna were amplified by polymerase chain reaction (PCR), and were cloned into pGEM-T Easy vector subsequently. The positive recombinant plasmids were identified by PCR and then sequenced. By sequence comparison and comparative analysis with the relative sequences of rabbit Eimeria spp. available in GenBank, the results showed that the lengths of Eimeria intestinalis, Eimeria flavescens and Eimeria magna were 1065, 1009 and 1047 bp, respectively, and the sequence homologies with the same species sequences were 99.2%, 99.0% and 94.5%, respectively, while were 55.3% to 82.1% compared with corresponding sequences of other different species sequences. The phylogenetic analysis using software Mega 5.0 showed that all rabbit coccidia clustered together in a clade, which was divided into two sister lineages, corresponding to the presence or absence of oocyst residuum. The result demonstrated ITS could be used as a molecular marker for the species identification of rabbit coccidia.

Key words: Eimeria intestinalis; Eimeria flavescens; Eimeria magna; rDNA ITS; sequence analysis; phylogenetic analysis

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