Euphorbia milii (Euphorbiaceae) grows as a scrambling shrub with many branches. Here, we report and characterize the complete plastome of E. milii in an effort to provide genomic resources useful for promoting its systematic research. The plastome of E. milii is found to possess a total length of 160,806 bp with the typical quadripartite structure of angiosperms, contains two Inverted Repeats (IRs) of 26,695 bp, a Large Single-Copy (LSC) region of 90,211 bp and a Small Single-Copy (SSC) region of 17,205 bp. The plastome contains 114 genes, consisting of 80 unique protein-coding genes, 30 unique tRNA genes and four unique rRNA genes. The overall A/T content in the plastome of E. milii is of 64.10%. The phylogenetic analysis indicated that E. milii is close to E. tirucalli within Euphorbiaceae in this study. The complete plastome sequence of E. milii will provide a useful resource for the conservation genetics of this species as well as for the phylogenetic studies of Euphorbiaceae.
Keywords: Euphorbia milii; Euphorbiaceae; genome structure; phylogeny; plastome.
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