Abstract
In this study, we sequenced and assembled the complete chloroplast genome of Chloranthus nervosus Collett ex Hemsl. 1890. The total length of the complete chloroplast sequence was found to be 158,002 bp. It consisted of a large single-copy (LSC) region of 87,127 bp, a small single-copy (SSC) region of 18,541 bp, and a pair of inverted repeat (IR) regions, each with a length of 26,167 bp. The overall GC content of the complete chloroplast genome was 38.9%, with the LSC region, SSC region, and IR regions exhibiting GC contents of 37.4%, 34.1%, and 43.1%, respectively. The annotation of the chloroplast genome revealed a total of 131 genes, comprising 86 protein-coding genes, 37 tRNA genes, and eight rRNA genes. Phylogenetic analysis revealed that the seven sampled species of Chloranthus were divided into two clades. Within the clade characterized by long filamentous anther connectives, C. nervosus showed the closest relation to C. japonicus. These findings validated the previous preliminary results on the phylogenetic relationships of the seven species of Chloranthus with strong support.
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