The complete chloroplast genome of Ligusticum jeholense (Umbelliferae, Ligusticum L.).
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ABSTRACT:
SUBMITTER: Wang SJ
PROVIDER: S-EPMC7781892 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:Comparative chloroplast genome analyses are mostly carried out at lower taxonomic levels, such as the family and genus levels. At higher taxonomic levels, chloroplast genomes are generally used to reconstruct phylogenies. However, little attention has been paid to chloroplast genome evolution within orders. Here, we present the chloroplast genome of Sedum sarmentosum and take advantage of several available (or elucidated) chloroplast genomes to examine the evolution of chloroplast genomes in Saxifragales. The chloroplast genome of S. sarmentosum is 150,448 bp long and includes 82,212 bp of a large single-copy (LSC) region, 16.670 bp of a small single-copy (SSC) region, and a pair of 25,783 bp sequences of inverted repeats (IRs).The genome contains 131 unique genes, 18 of which are duplicated within the IRs. Based on a comparative analysis of chloroplast genomes from four representative Saxifragales families, we observed two gene losses and two pseudogenes in Paeonia obovata, and the loss of an intron was detected in the rps16 gene of Penthorum chinense. Comparisons among the 72 common protein-coding genes confirmed that the chloroplast genomes of S. sarmentosum and Paeonia obovata exhibit accelerated sequence evolution. Furthermore, a strong correlation was observed between the rates of genome evolution and genome size. The detected genome size variations are predominantly caused by the length of intergenic spacers, rather than losses of genes and introns, gene pseudogenization or IR expansion or contraction. The genome sizes of these species are negatively correlated with nucleotide substitution rates. Species with shorter duration of the life cycle tend to exhibit shorter chloroplast genomes than those with longer life cycles.
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Project description:Abstract Agave angustifolia is commonly used for the production of bacanora, a kind of fermented and distilled beverage in Mexico. In the present study, we have successfully assembled its chloroplast genome. The full length of the genome is 157,274 bp with the GC content of 37.84%. There is a large single copy region (LSC) of 85,895 bp, a pair of inverted repeat regions (IR) of 26,575 bp and a small single copy region (SSC) of 18,229 bp in the genome. A total of 132 genes are annotated in the cp genome. Among these, there are 86 protein-coding genes, 38 tRNAs and 8 rRNAs. Phylogenetic analysis reveals that A. angustifolia is closely related with A. H11648.
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Project description:Pityopsis includes several regionally and one federally endangered species of herbaceous perennials. Four species are highly localized, including the federally endangered P. ruthii. The genus includes several ploidy levels and interesting ecological traits such as drought tolerance and fire-dependent flowering. Results from previous cladistic analyses of morphology and from initial DNA sequence studies did not agree with one another or with the infrageneric taxonomic classification, with the result that infrageneric relationships remain unresolved. We sequenced, assembled, and compared the chloroplast (cp) genomes of 12 species or varieties of Pityopsis to better understand generic evolution. A reference cp genome 152,569 bp in length was assembled de novo from P. falcata. Reads from other sampled species were then aligned to the P. falcata reference and individual chloroplast genomes were assembled for each, with manual gapfilling and polishing. After removing the duplicated second inverted region, a multiple sequence alignment of the cp genomes was used to construct a maximum likelihood (ML) phylogeny for the twelve cp genomes. Additionally, we constructed a ML phylogeny from the nuclear ribosomal repeat region after mapping reads to the Helianthus annuus region. The chloroplast phylogeny supported two clades. Previously proposed clades and taxonomic sections within the genus were largely unsupported by both nuclear and chloroplast phylogenies. Our results provide tools for exploring hybridity and examining the physiological and genetic basis for drought tolerance and fire-dependent flowering. This study will inform breeding and conservation practices, and general knowledge of evolutionary history, hybridization, and speciation within Pityopsis.
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Project description:Premise:A new set of primers was developed for sequencing of whole chloroplast genomes of Magnolia species and gap-filling of unfinished genomes. Methods and Results:Two hundred and fifty primers were newly designed based on two previously reported chloroplast genomes from two different genera in Magnoliaceae. A total of 134 primer pairs, including the ones developed in this study and 18 previously reported ones, were enough to cover the entire chloroplast genome sequences in Magnoliaceae. Four species from different sections of Magnolia (M. dealbata, M. fraseri var. pyramidata, M. liliiflora, and M. odora) were used to show the general application of these primers to chloroplast genome sequencing in Magnolia. Conclusions:Using the developed primers, four Magnolia chloroplast genomes were successfully assembled. These results show the utility of these primers across Magnolia and their potential use for phylogenetic studies, DNA barcoding, and population genetics in this group.
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Project description:PREMISE OF THE STUDY:We report the complete sequence of the chloroplast genome of Capsicum frutescens (Solanaceae), a species of chili pepper. METHODS AND RESULTS:Using an Illumina platform, we sequenced the chloroplast genome of C. frutescens. The total length of the genome is 156,817 bp, and the overall GC content is 37.7%. A pair of 25,792-bp inverted repeats is separated by small (17,853 bp) and large (87,380 bp) single-copy regions. The C. frutescens chloroplast genome encodes 132 unique genes, including 87 protein-coding genes, 37 transfer RNA (tRNA) genes, and eight ribosomal RNA (rRNA) genes. Of these, seven genes are duplicated in the inverted repeats and 12 genes contain one or two introns. Comparative analysis with the reference chloroplast genome revealed 125 simple sequence repeat motifs and 34 variants, mostly located in the noncoding regions. CONCLUSIONS:The complete chloroplast genome sequence of C. frutescens reported here is a valuable genetic resource for Capsicum species.
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Project description:Disporum sessile roots are used as a medicinal herb. To ensure the accurate identification of D. sessile, we sequenced its chloroplast genome using the Illumina MiSeq platform. Results showed that the chloroplast genome of D. sessile is 159,102 bp in size, with a large single-copy (LSC) region (85,456 bp), a small single-copy (SSC) region (17,108 bp), and two inverted repeat (IR) regions (IRa and IRb; 28,269 bp each). Additionally, the chloroplast genome contains 112 unique genes, including 78 protein-coding, four ribosomal RNA, and 30 transfer RNA genes. Phylogenetic analysis revealed that D. sessile is most closely related to Colchicum autumnale.
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Project description:Abstract Ormosia purpureiflora is endemic to China. It is named after its purple flowers. It is a small tree only up to 3 m. It has leathery leaves, racemose inflorescences. The seeds are elliptic and red in coat. It is only confined to Luofushan Provincial Nature Reserve in Huizhou of Guangdong Province. Herein, we first reported on its complete chloroplast genome sequence as genomic resource for conservation purposes. The chloroplast genome of O. purpureiflora was 173,364 bp in length, with a large single-copy region of 73,465 bp, a small single-copy region of 18,751 bp, and a pair of inverted repeat regions that were 40,574 bp each. A total of 90 protein-coding genes, 38 transfer RNA genes, and eight ribosomal RNA genes were predicted, while 106 simple sequence repeats were recorded throughout the genome. Phylogenetic analysis revealed that O. purpureiflora was sister to O. emarginata.
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Project description:Acer negundo L. is popular as ornamental shade trees. In this study, we sequenced, assembled and characterized the complete chloroplast genome of A. negundo. The genome sequence of A. negundo was 155,910 bp, consisting of a large single-copy region with 85,650 bp (LSC), a small single-copy region with 18,092 bp (SSC), and two inverted repeat regions with 26,084 and 26,090 bp (IRs). The GC content in the chloroplast genome of A. negundo was 37.9%. A total of 127 functional genes were predicted, including 83 protein-coding genes, 40 tRNA genes, and 4 rRNA genes. As shown in the phylogenetic tree, A. negundo was clustered into a monophyletic cluster.
| S-EPMC8667938 | biostudies-literature
Project description:Callianthe picta likes a warm and humid climate, is resistant to barrenness, and is easy to reproduce. Its petals and leaves can promote blood circulation and remove blood stasis, and can also be used to relax the muscles and collaterals. In this study, we sequenced the complete chloroplast genome sequence of C. picta to investigate its phylogenetic relationship in the family Abutilon. The complete chloroplast size of C. picta is 160,398 bp, including a large single-copy (LSC) region of 89,088 bp, a small single-copy (SSC) region of 20,138 bp, a pair of invert repeats (IRs) regions of 25,586 bp. The GC content of the whole complete chloroplast genome is 37.0%. We annotated 128 genes in the genome in detail, including 84 protein-coding genes, 36 tRNA genes, and 8 rRNA genes. Phylogenetic analysis indicated that C. picta was closely related to Abutilon theophrati.
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