Complete chloroplast genome sequences of Dracocephalum argunense and D. integrifolium (Lamiaceae: Nepetinae)

Abstract

Dracocephalum is a large genus comprises approximately 80 species of perennial herbs, mainly distributed in high elevation regions of temperate and Central Asia, with about half native to China. Within the genus, D. argunense and D. integrifolium are important herbs with great medicinal value. We sequenced plastomes of these two species for the first time. These plastomes showed a typical quadripartite structure and the length varied from 149,978 bp (D. integrifolium) to 150,802 bp (D. argunense). Plastomes of D. argunense and D. integrifolium included 127 and 133 genes, respectively. Phylogenetic analyses supported the monophyly of the redefined Dracocephalum and systematic relationships within the sampled species were well resolved. Our study added new genetic information about D. argunense and D. integrifolium and has great potential for further diversity studies, phylogenetic studies, and understanding of evolutionary history in Dracocephalum.

Keywords

• Dracocephalum
• medicinal plants
• Nepetoideae
• phylogenomics
• plastome