DNA条形码技术在河北省鼠疫疫源地鼠种鉴定中的应用  

Application of DNA barcoding technique in identification of rodent species in natural focus of plague in Hebei province,China

作　　者：闫东[1] 鲁亮[2] 金圣浩[1] 史献明[1] 崔耀仁[1] 刘冠纯[1] 李玉伟[2] 刘起勇[2] 郑楠[1] 康东梅 白雪薇[1] 牛艳芬[1] 陈永明[1] 周松[1] 兰晓宇[1] 李振海[1] 

机构地区：[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

出　　处：《中国媒介生物学及控制杂志》2014年第1期21-23,共3页Chinese Journal of Vector Biology and Control

基　　金：卫生行业科研专项(201202021);河北省医学科学研究重点课题(20110267)~~

摘　　要：目的以河北省鼠疫疫源地常见鼠为对象,探讨DNA条形码技术在鼠类鉴定方面的可行性。方法 2012年在河北省鼠疫疫源地内采集鼠肝脏标本,并保存整只鼠,制作剥制标本,提取基因组DNA,用通用引物PCR法扩增线粒体COⅠ基因,并测序。将测序结果与GenBank中其他鼠类物种的DNA条形码进行BLAST比对,并构建分子进化树。结果 87份样本均能通过PCR扩增出特异性COⅠ基因条带,其中85份样本所构建的分子进化树结果与形态学鉴定结果一致,2份样本结果有差异,经反复鉴定头骨及形态标本,发现为现场鉴定错误。结论 DNA条形码技术能够对鼠类进行有效的物种鉴定,同时还可以探讨啮齿动物属、种分类单元的系统发育问题。Objective To evaluate the feasibility of DNA barcoding in identifying the rodent species based on the common rodents in the natural focus of plague in Hebei province, China. Methods The rodent liver specimens were collected in the natural focus of plague in Hebei in 2012; the whole rodents were conserved, and then the stuffed specimens were made; genomic DNA was extracted from the rodent liver. The mitochondrial CO Ⅰ gene was amplified by consensus primer PCR and then sequenced. BLAST comparison was made between the sequencing results and the DNA bar codes of other rodent species in GenBank, and molecular evolutionary tree was constructed. Results In this research, specific CO Ⅰgene bands were obtained by PCR amplification in all 87 samples. Among all samples, 85 had the molecular evolutionary tree in accordance with the results of morphological identification, and 2 had different results, but the field identification was found to be incorrect by identifying the skulls and morphological specimens repeatedly. Conclusion DNA barcoding technique can be used to effectively identify the rodent species. At the same time, it can also be used for discussing the phylogenetic relationship of rodent genus and species classification.

关 键 词：鼠疫疫源地 DNA条形码 CO Ⅰ基因 

分 类 号：S443[农业科学—农业昆虫与害虫防治]