JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (6): 27-32.doi: 10.3969/j.issn.1000-2006.202004013

Special Issue: 野生动物保护与疫病防控专题

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DNA barcoding of Artiodactyla in cases involved in wildlife for species identification

LIU Dawei(), HOU Senlin*(), ZHOU Yongwu, FEI Yiling, HE Jian   

  1. Key Laboratory of Wildlife Evidence Technology, Forest Police Forensic Identification Center, National Forestry and Grassland Administration,Nanjing Forest Police College, Nanjing 210023, China
  • Received:2020-04-08 Revised:2020-08-28 Online:2020-11-30 Published:2020-12-07
  • Contact: HOU Senlin E-mail:dwliu@nfpc.edu.cn;senlin_hou@163.com

Abstract:

【Objective】In this study, we aimed to identify Artiodactyla species in cases of wildlife destruction, using mitochondrial DNA barcoding. 【Method】COI and Cyt b sequences in 67 samples from 16 species were amplified. Animal samples were identified using Blast search on the GenBank sequences. Intra-and inter-specific genetic distances were compared, and phylogenetic trees were constructed using MEGA 7.0. 【Result】In a homology analysis, the Cyt b sequences of Capreolus pygargus and Capreolus capreouls were 99.64%-99.82% homologous; this sequence could not distinguish two closely related species, whereas other COI and Cyt b sequences could. The intra-specific genetic distance was 0-1.4% for COI and 0-0.5% for Cyt b, whereas the inter-specific genetic distance was 1.8%-18.8% for COI and 4.0%-15.8% for Cyt b. An obvious barcoding gap was detected in both markers for all species. The phylogenetic tree showed that samples from the same species formed monophyletic groups with high support values. The gaps between different species were clear, and all samples from each species formed a single branch with a high support value.【Conclusion】COI and Cyt b may serve as molecular markers for Artiodactyla identification in cases involving wildlife resources. To minimize the risk of false identification, the two DNA barcodes could be used simultaneously, especially for the closely related species.

Key words: Artiodactyla, DNA barcoding, species identification, COI, Cyt b, gene fragment

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