中国媒介生物学及控制杂志 ›› 2020, Vol. 31 ›› Issue (6): 662-666.DOI: 10.11853/j.issn.1003.8280.2020.06.007

• 论著 • 上一篇    下一篇

DNA条形码技术在河北省鼠疫疫源地常见蚤种鉴定中的应用

兰晓宇1, 鲁亮2, 候芝林1, 杜国义1, 史献明1, 崔耀仁1, 刘冠纯1, 陈永明1, 康东梅1, 郑楠1, 任兴宇1, 闫东1   

  1. 1 河北省鼠疫防治所流行病科, 河北 张家口 075000;
    2 中国疾病预防控制中心传染病预防控制所, 传染病预防控制国家重点实验室, 北京 102206
  • 收稿日期:2020-05-11 出版日期:2020-12-20 发布日期:2020-12-20
  • 通讯作者: 闫东,Email:yandong0000@126.com
  • 作者简介:兰晓宇,女,硕士,检验技师,主要从事鼠疫防治工作,Email:mylxy2008@126.com
  • 基金资助:
    河北省医学科学研究重点课题(20180955)

Application of DNA barcoding technique in identification of common flea species in plague foci of Hebei province, China

LAN Xiao-yu1, LU Liang2, HOU Zhi-lin1, DU Guo-yi1, SHI Xian-ming1, CUI Yao-ren1, LIU Guan-chun1, CHEN Yong-ming1, KANG Dong-mei1, ZHENG Nan1, REN Xing-yu1, YAN Dong1   

  1. 1 Anti-plague Institute of Hebei Province, Zhangjiakou 075000, Hebei Province, China;
    2 State Key Laboratory of Infectious Diseases Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention
  • Received:2020-05-11 Online:2020-12-20 Published:2020-12-20
  • Supported by:
    Supported by the Key Medical Projects of Hebei Province (No. 20180955)

摘要: 目的 以河北省常见鼠疫媒介蚤为研究对象,使用线粒体细胞色素C氧化酶亚基Ⅰ(COⅠ)基因和细胞色素C氧化酶亚基Ⅱ(COⅡ)基因对其进行分子生物学鉴定,建立河北省常见蚤种的DNA条形码数据库。方法 2018年6-8月在张家口市康保牧场采集鼠体寄生蚤及洞干蚤,2018年9-10月在张家口崇礼区采集鼠体寄生蚤,经形态学鉴定后,选取标本形态完整的不同蚤种提取总DNA,扩增线粒体COⅠ和COⅡ基因片段,并进行测序,将测序结果与GenBank中蚤类序列进行BLAST同源性比对,利用邻接法构建COⅠ和COⅡ基因序列的系统进化树。结果 选取的16份蚤类样本均能通过PCR扩增出特异性COⅠ和COⅡ基因条带,其中13份样本COⅠ测序成功,12份样本COⅡ测序成功。COⅠ基因的分子进化树结果中,12份样本与形态学鉴定结果一致,1份样本与形态学有差异。COⅡ基因的分子进化树结果与形态学鉴定全部一致。结论 COⅠ和COⅡ基因均可作为DNA条形编码基因对河北省鼠疫疫源地的常见蚤类进行物种鉴定,利用2个基因同时进行蚤种鉴定提高了鉴定的成功率,所积累数据为以后的蚤类分子鉴定技术提供了可利用的数据库。

关键词: 蚤类, DNA条形码技术, 细胞色素C氧化酶亚基Ⅰ基因, 细胞色素C氧化酶亚基Ⅱ基因, 种类鉴定

Abstract: Objective To perform molecular biological identification of the common plague vector fleas in Hebei province, China by analyzing the mitochondrial cytochrome c oxidase subunitⅠ(COⅠ) gene and cytochrome c oxidase subunit Ⅱ:(COⅡ) gene, and to establish a DNA barcode database of common flea species in Hebei province. Methods Rodent-parasitic fleas and burrow fleas were collected in Kangbao ranch of Zhangjiakou, Hebei province from June to August, 2018, and rodent-parasitic fleas were collected in Chongli district of Zhangjiakou from September to October, 2018. After morphological identification, total DNA was extracted from various species of fleas of intact specimens, and then the mitochondrial COⅠ and COⅡ gene fragments were amplified and sequenced. The sequences were compared by BLAST for homology with those of fleas in GenBank. The phylogenetic tree of the COⅠ gene and COⅡ gene sequences was constructed by the neighbor-joining method. Results The specific COⅠ and COⅡ gene bands were amplified by PCR in all 16 samples of fleas. Among them, the COⅠ gene was sequenced successfully in 13 samples, and the COⅡ gene in 12 samples. According to the results of molecular phylogenetic tree of the COⅠ gene, 12 samples were consistent with morphological identification, and 1 sample was not. The results of molecular phylogenetic tree of the COⅡ gene were all consistent with the morphological identification in 12 samples. Conclusion Both COⅠ and COⅡ genes can be used as DNA barcode markers for species identification of common fleas in plague foci of Hebei province. Simultaneous identification of fleas using two genes improves the success rate of identification. The accumulated data will help establish an available database for future flea molecular identification technology.

Key words: Flea, DNA barcoding technique, Cytochrome c oxidase subunit Ⅰ, Cytochrome c oxidase subunit Ⅱ, Species identification

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