中药材蜈蚣及其混伪品DNA条形码鉴别研究

Identification of Scolopendra subspinipes mutilans and its adulterants using DNA barcode

利用DNA条形码技术对蜈蚣药材进行鉴别,为蜈蚣药材鉴定提供新的方法。该研究以COI条形码序列为基础,对蜈蚣实验样品进行DNA提取,PCR扩增和双向测序,用MEGA6.0软件对所有5个物种的50份样品进行序列比对和邻接(NJ)树构建。结果显示实验样品均可以获得COI序列,蜈蚣药材与其混伪品COI序列种间平均K2P距离为0.222,种间最小K2P距离为0.190,基于COI序列构建的邻接(NJ)树中少棘巨蜈蚣单独聚在一枝,与其混伪品可以相互区分。因此基于COI条形码序列可以准确鉴定蜈蚣及其混伪品。

In this study, the COI barcode was used to identify the Scolopendra medicinal materials and its adulterants in order to provide a new method for the identification of Scolopendra. Genomic DNA was extracted from the experimental samples. The COI sequences were amplified and sequenced bi-directionally. Sequence alignment and NJ tree construction was carried out by MEGA6.0 software. The results showed that the COI sequences can be obtained from all experimental samples. The average inter-specific K2P distance of Scolopendra was 0.222 and the minimum inter-specific distance was 0.190. All the Scolopendra subspinipes mutilans medicinal samples clustered into a clade in the NJ tree and can be distinguished from its adulterants. In a conclusion, COI can be used to correctly identify Scolopendra medicinal materials, and it will be a potential DNA barcode for identifying other animal medicinal materials.