Species Identification of Dracaena Using the Complete Chloroplast Genome as a Super-Barcode

Frontiers in Pharmacology

Zhonglian Zhang¹  Xiaojun Ma²  Meifang Song²  Yanhong Guan⁴  Yue Zhang⁴ 

[1] Peking Union Medical College, Beijing, China;Peking Union Medical College, Jinghong, China;;Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences &;Yunnan Branch of Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences &

关键词: Dracaena Vand. ex L.;    chloroplast genome;    identification;    super-barcode;    Liliaceae;   

DOI  :  10.3389/fphar.2019.01441

来源: DOAJ

【 摘 要 】

The taxonomy and nomenclature of Dracaena plants are much disputed, particularly for several Dracaena species in Asia. However, neither morphological features nor common DNA regions are ideal for identification of Dracaena spp. Meanwhile, although multiple Dracaena spp. are sources of the rare traditional medicine dragon’s blood, the Pharmacopoeia of the People’s Republic of China has defined Dracaena cochinchinensis as the only source plant. The inaccurate identification of Dracaena spp. will inevitably affect the clinical efficacy of dragon’s blood. It is therefore important to find a better method to distinguish these species. Here, we report the complete chloroplast (CP) genomes of six Dracaena spp., D. cochinchinensis, D. cambodiana, D. angustifolia, D. terniflora, D. hokouensis, and D. elliptica, obtained through high-throughput Illumina sequencing. These CP genomes exhibited typical circular tetramerous structure, and their sizes ranged from 155,055 (D. elliptica) to 155,449 bp (D. cochinchinensis). The GC content of each CP genome was 37.5%. Furthermore, each CP genome contained 130 genes, including 84 protein-coding genes, 38 tRNA genes, and 8 rRNA genes. There were no potential coding or non-coding regions to distinguish these six species, but the maximum likelihood tree of the six Dracaena spp. and other related species revealed that the whole CP genome can be used as a super-barcode to identify these Dracaena spp. This study provides not only invaluable data for species identification and safe medical application of Dracaena but also an important reference and foundation for species identification and phylogeny of Liliaceae plants.

【 授权许可】

Unknown