Project description:Swertia diluta, a traditional Chinese medicine, is widely used to treat jaundice hepatitis, dysentery, dyspepsia, etc. The plastome is 153,691 bp in length, with one large single copy region of 83,860 bp, one small single copy region of 18,301 bp, and two inverted repeat (IR) regions of 25,765 bp. It contains 134 genes, including 84 protein-coding genes, 8 ribosomal RNA, and 37 transfer RNA. Phylogenetic tree shows that S. diluta is a sister species to S. mussotii. The complete chloroplast genome could provide genetic information of this species would contribute to the formulation of protection strategy.
Project description:Swertia mileensis is an important medicinal plant endemic to South-east Yunnan, China, which has been widely used to treat icteric hepatitis. The complete chloroplast genome sequence of S. mileensis is presented in this study, the total size is 153,015 bp in length with a typical quadripartite structure including a pair of inverted repeat (IRs, 25,786 bp) regions separated by a large single copy (LSC, 83,048 bp) region and a small single copy (SSC, 18,395 bp) region. The overall GC content of it is 38.2%. The cp genome has 134 annotated genes, including 85 protein-coding genes, 37 tRNA genes and 8 rRNA genes. Among these genes, nine genes have one intron and two genes contain two introns. The phylogenetic tree based on 16 complete plastomes of support close relationships among two species of Swertia with 100% bootstrap value.
Project description:Barnardia japonica is an ornamental bulb with important medicinal usage. The complete chloroplast genome of B. japonica was newly sequenced in this study. The total chloroplast genome size of B. japonica was 156,129?bp. In total, 131 genes were identified, including 85 protein-coding genes, 8 rRNA genes, and 38 tRNA genes. Eighteen genes are containing introns (clpP and ycf3 contained two introns) and 18 genes had two copies. The overall GC content of this genome was 37.7%. A further phylogenomic analysis of Asparagales, including 36 taxa, was conducted for the placement of genus Barnardia. The complete plastome of B. japonica will provide a valuable resource for further genetic conservation, phylogenomic, and evolution studies in the genus and family.
Project description:In this study, a complete chloroplast genome sequence of Artemisia fukudo (Asteraceae family) was characterized by de novo assembly using whole genome sequence data. The chloroplast genome was 151,011 bp in length, comprising a large single-copy region of 82,751 bp, a small single copy region of 18,348 bp and a pair of inverted repeats of 24,956 bp. The genome contained 80 protein-coding genes, 4 rRNA genes and 30 tRNA genes. Phylogenetic tree revealed that A. fukudo was closely located in other Artemisia species, Artemisia montana and Artemisia frigida.
Project description:Swertia divaricata Harry Sm., 1965, (Gentianaceae) is a perennial herb endemic to Northwest Yunnan, China, belonging to the species-rich genus Swertia. It possesses unique morphological features but its systematic position remains uncertain. To determine its phylogenetic placement, the complete plastid genome of S. divaricata was assembled utilizing high-throughput sequencing data. The genome is circular, spanning 152,073 bp, and comprises a large single-copy (LSC) region of 82,470 bp, a small single-copy (SSC) region of 18,153 bp, and two inverted repeats (IR) regions, each 25,725 bp. A total of 130 genes were annotated, including 85 protein-coding genes, 37 tRNA genes, and eight rRNA genes. The plastome of S. divaricata exhibits a structure and gene composition highly similar to those of other Swertia plastomes. Phylogenetic analysis indicated that S. divaricata is closely related to S. erythrosticta, sister to a subclade comprising species from sections Swertia and Apterae. The plastome sequence described herein constitutes a valuable contribution to phylogenetic and evolutionary research on Swertia.
Project description:Swertia cordata, a herbaceous plant, has been used in medicines as an alternative febrifuge and anthelmintic. In this study, the complete chloroplast DNA sequence of S. cordata was assembled. It is 153,429 bp in length, including a large single-copy region of 83,613 bp and a small single-copy region of 18,038 bp separated by a pair of inverted repeat regions of 25,889 bp each. A total of 129 genes are detected, including 84 protein-coding genes, 37 tRNA genes, and 8 rRNA genes. The complete chloroplast genome of S. cordata will help to study the genetic diversity and phylogenetic analysis of Swertia.
Project description:The Orchidaceae contains numerous species with great ecological and economic values. In this study, the complete chloroplast genome of Liparis japonica was presented by next-generation sequencing technologies. The cpDNA is 152,084 bp in length with a large single copy region (LSC) of 85,398 bp, a small single copy region (SSC) of 14,774 bp, and a pair of inverted repeat regions (IRs) of 25,956 bp. It contains 132 genes, including 79 protein-coding genes, 38 tRNA genes, 8 rRNA genes, and 7 pseudogenes. The overall GC content is 37.0%, while the corresponding values in the LSC, SSC, and IR region are 34.3, 30.0, 43.5%, respectively. The phylogenetic analysis shows that Liparis japonica is sister to Liparis loeselii and the genus Liparis is closely related to Dendrobium.
Project description:Euscaphis japonica is not only an ideal ornamental plant, but also a traditional medicinal plant, which is an extremely valuable species to study. We determined the complete chloroplast genome sequence for E. japonica using Illumina sequencing technology. The complete chloroplast sequence is 160,467 bp in length, including a large single-copy (LSC) region of 88,716 bp, a small single-copy (SSC) region of 18,614 bp, and a pair of invert repeats (IR) regions of 26,568 bp. Plastid genome contains 142 genes, 46 protein-coding genes, 39 tRNA genes, and eight rRNA genes. Phylogenetic analysis base on 14 chloroplast genomes indicates that E. japonica forms an isolated clade and sisters to Glycosmis-Gossypium clade with strong support.
Project description:Sedum tricarpum Makino., is a perennial succulent herb, which was first discovered and established as a new species ten years ago. Here, we report the complete chloroplast genome of S. tricarpum. It shows a typical quadripartite structure with a total length of 149,349 bp, including the large single-copy region (LSC) of 81,644 bp, the small single-copy region (SSC) of 16,643 bp, and two separated inverted regions (IRs) of 25,531 bp, respectively. For the whole genome, there are a total of 131 genes, including 85 protein-coding genes (PCGs), 8 rRNA genes, and 37 tRNA genes. The overall GC content of the cp genome is 37.8%. A well-supported phylogenetic tree revealed monophyly formed by S. tricarpum and S. sarmentosum, suggesting a relatively closer phylogenetic relationship with the clade consisting of S. lineare and Graptopetalum amethystinum. The complete chloroplast genome of S. tricarpum provides valuable information for further phylogenetic reconstruction of the Crassulaceae family.
Project description:Swertia L. is a large genus in Swertiinae (Gentianaceae). In China, many Swertia species are used as traditional Tibetan medicines, known as "Zangyinchen" or "Dida". However, the phylogenetic relationships among Swertia medicinal plants and their wild relatives have remained unclear. In this study, we sequenced and assembled 16 complete chloroplast (cp) genomes of 10 Swertia species, mainly distributed in Qinghai Province, China. The results showed that these species have typical structures and characteristics of plant cp genomes. The sizes of Swertia cp genomes are ranging from 149,488 bp to 154,097 bp. Most Swertia cp genomes presented 134 genes, including 85 protein coding genes, eight rRNA genes, 37 tRNA genes, and four pseudogenes. Furthermore, the GC contents and boundaries of cp genomes are similar among Swertia species. The phylogenetic analyses indicated that Swertia is a complex polyphyletic group. In addition, positive selection was found in psaI and petL genes, indicating the possible adaptation of Qinghai Swertia species to the light environment of the Qinghai-Tibet plateau. These new cp genome data could be further investigated to develop DNA barcodes for Swertia medicinal plants and for additional systematic studies of Swertia and Swertiinae species.