The complete plastid genome sequence of Ilex suaveolens (H. Lév.) Loes, the most abundant medicinal holly in Mount Huangshan

Abstract

Holly (Ilex L.) is a woody dioecious genus cultivated as pharmaceutical, ornamentals, and industrial materials. Ilex suaveolens (H. Lév.) Loes is an endemic medicinal holly with a predominant distribution in Mount Huangshan, China. In the present work, the complete plastid genome of I. suaveolens was de novo sequenced by high-throughput sequencing technology. The newly-assembled plastid genome holds 37.6% of the overall GC content and a length of 157,857 bp, comprising a large single-copy (LSC, 87,255 bp), a small single-copy (SSC, 18,398 bp), and a pair of inverted repeat (IRs, 26,102 bp) regions. The plastid genome annotation suggested the presence of a total of 89 protein-encoding genes, 37 transfer RNA (tRNA) genes, and eight ribosomal RNA (rRNA) genes. The plastome-mediated phylogenetic topology revealed that I. suaveolens clustered together with I. szechwanenesis and I. viridis in the same clade, and a strong relationship between clades and biogeography was found. These data contribute to the understanding of genetic diversity and conservation study of Ilex in Mount Huangshan.

Keywords

• ilex suaveolens
• plastid genome
• phylogenetic analysis
• genetic diversity
• conservation