The complete chloroplast genomes of three Hamamelidaceae species: Comparative and phylogenetic analyses

作者：Ningjie Wang, Shuifei Chen, Lei Xie, Lu Wang, Yueyao Feng, Ting Lv, Yanming Fang, Hui Ding · 发表于：Ecology and Evolution · 年份：2022 · DOI：10.1002/ece3.8637 · 被引用次数：31 · 研究领域：Genomics and Phylogenetic Studies、Plant and Fungal Species Descriptions、Plant Diversity and Evolution

Abstract Hamamelidaceae is an important group that represents the origin and early evolution of angiosperms. Its plants have many uses, such as timber, medical, spice, and ornamental uses. In this study, the complete chloroplast genomes of Loropetalum chinense (R. Br.) Oliver, Corylopsis glandulifera Hemsl., and Corylopsis velutina Hand.‐Mazz. were sequenced using the Illumina NovaSeq 6000 platform. The sizes of the three chloroplast genomes were 159,402 bp ( C . glandulifera ), 159,414 bp ( C . velutina ), and 159,444 bp ( L . chinense ), respectively. These chloroplast genomes contained typical quadripartite structures with a pair of inverted repeat (IR) regions (26,283, 26,283, and 26,257 bp), a large single‐copy (LSC) region (88,134, 88,146, and 88,160 bp), and a small single‐copy (SSC) region (18,702, 18,702, and 18,770 bp). The chloroplast genomes encoded 132–133 genes, including 85–87 protein‐coding genes, 37–38 tRNA genes, and 8 rRNA genes. The coding regions were composed of 26,797, 26,574, and 26,415 codons, respectively, most of which ended in A/U. A total of 37–43 long repeats and 175–178 simple sequence repeats (SSRs) were identified, and the SSRs contained a higher number of A + T than G + C bases. The genome comparison showed that the IR regions were more conserved than the LSC or SSC regions, while the noncoding regions contained higher variability than the gene coding regions. Phylogenetic analyses revealed that species in the same genus tended to cluster tog...