The complete chloroplast genome sequence of Anogeissus acuminata (combretaceae).
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ABSTRACT:
SUBMITTER: Yu J
PROVIDER: S-EPMC7782036 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:Spirea japonica var. acuminata Franch. (Rosaceae) is a Chinese herbal medicine distributed in southwest and east China. The first complete chloroplast genome of Spirea japonica var. acuminata Franch. was assembled and reported in this study. The genome is 153,822 bp in length and contained 125 encoded genes in total, including 80 protein-coding genes, eight ribosomal RNA genes, and 37 transfer RNA genes. The phylogenomic analysis showed that Spirea japonica var. acuminata Franch. was closely related to Spirea blumei, Spirea trilobata, Spirea mongolica and Spirea insularis according to the current sampling extent.
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Project description:Musa acuminata var. chinensis is one of the most important wild banana species native to China which has huge potential breeding value by its cold tolerance and disease resistance. In this study, we first reported the complete chloroplast genome of M. acuminata var. chinensis and explore its phylogenetic position using a maximum likelihood phylogenetic tree. The chloroplast genome of M. acuminata var. chinensis is 170,402 bp in length and the overall GC content of the whole genome is 36.8%. It consisting of a pair of inverted repeat (IR, 35,320 bp) regions, a large single-copy (LSC, 88,870 bp) and a small single-copy (SSC, 10,900 bp). The chloroplast genome contained 112 genes, including 79 protein-coding genes, 29 tRNA genes, and 4 rRNA ribosomal genes. The most genes occur as a single copy, while 23 gene species occur in double copies. Phylogenetic analysis of 7 selected chloroplast genomes revealed that M. acuminata var. chinensis was closely related to M. acuminata ssp. malaccensis. The complete chloroplast genome of M. acuminata var. chinensis will greatly enhance precious gene resources for banana breeding programs in the future.
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Project description:BackgroundBanana (genus Musa) is a crop of major economic importance worldwide. It is a monocotyledonous member of the Zingiberales, a sister group of the widely studied Poales. Most cultivated bananas are natural Musa inter-(sub-)specific triploid hybrids. A Musa acuminata reference nuclear genome sequence was recently produced based on sequencing of genomic DNA enriched in nucleus.Methodology/principal findingsThe Musa acuminata chloroplast genome was assembled with chloroplast reads extracted from whole-genome-shotgun sequence data. The Musa chloroplast genome is a circular molecule of 169,972 bp with a quadripartite structure containing two single copy regions, a Large Single Copy region (LSC, 88,338 bp) and a Small Single Copy region (SSC, 10,768 bp) separated by Inverted Repeat regions (IRs, 35,433 bp). Two forms of the chloroplast genome relative to the orientation of SSC versus LSC were found. The Musa chloroplast genome shows an extreme IR expansion at the IR/SSC boundary relative to the most common structures found in angiosperms. This expansion consists of the integration of three additional complete genes (rps15, ndhH and ycf1) and part of the ndhA gene. No such expansion has been observed in monocots so far. Simple Sequence Repeats were identified in the Musa chloroplast genome and a new set of Musa chloroplastic markers was designed.ConclusionThe complete sequence of M. acuminata ssp malaccensis chloroplast we reported here is the first one for the Zingiberales order. As such it provides new insight in the evolution of the chloroplast of monocotyledons. In particular, it reinforces that IR/SSC expansion has occurred independently several times within monocotyledons. The discovery of new polymorphic markers within Musa chloroplast opens new perspectives to better understand the origin of cultivated triploid bananas.
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Project description:The complete chloroplast genome of a local rare fern species Drynaria acuminata was sequenced. The genome has a length of 151,591 bp with 40.8% GC content, with in total 131 genes were annotated, including 88 protein genes, 35 tRNAs, and 8 rRNAs. This work provides basic information for its phylogeographical and conservation research.
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Project description:In the Combretaceae family, only two species of Lumnitzera and one species of Laguncularia belong to mangroves. Among them, Lumnitzera littorea (Jack) Voigt. is an endangered mangrove plant in China for the limited occurrence and seed abortion. In contrast, Lumnitzera racemosa Willd. is known as the most widespread mangrove plant in China. Laguncularia racemosa C. F. Gaertn., an exotic mangrove in China, has the fast growth and high adaptation ability. To better understand the phylogenetic positions of these mangroves in Combretaceae and in Myrtales and to provide information for studies on evolutionary adaptation for intertidal habitat, the complete chloroplast (cp) genomes of Lu. racemosa and La. racemosa were sequenced. Furthermore, we present here the results from the assembly and annotation of the two cp genomes, which were further subjected to the comparative analysis with Lu. littorea cp genomes we published before and other eleven closely related species within Myrtales. The chloroplast genomes of the three Combretaceae mangrove species: Lu. littorea, Lu. racemosa, and La. racemosa are 159,687 bp, 159,473 bp, and 158,311 bp in size. All three cp genomes host 130 genes including 85 protein-coding genes, 37 tRNAs, and 4 rRNAs. A comparative analysis of those three genomes revealed the high similarity of genes in coding-regions and conserved gene order in the IR and LSC/SSC regions. The differences between Lumnitzera and Laguncularia cp genomes are the locations of rps19 and rpl2 genes in the IR/SC boundary regions. Investigating the effects of selection events on shared protein-coding genes showed a relaxed selection had acted on the ycf2, ycf1, and matK genes of Combretaceae mangroves compared to the nonmangrove species Eucalyptus aromaphloia. The phylogenetic analysis based on the whole chloroplast genome sequence with one outgroup species strongly supported three Combretaceae mangroves together with other two Combretaceae species formed a cluster in Combretaceae. This study is the first report on the comparative analysis of three Combretaceae mangrove chloroplast genomes, which will provide the significant information for understanding photosynthesis and evolution in Combretaceae mangrove plants.
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Project description:The first complete chloroplast genome of Amomum villosum (Zingiberaceae) was reported in this study. The A. villosum genome was 163,608 bp in length, and comprised a pair of inverted repeat (IR) regions of 29,820 bp each, a large single-copy (LSC) region of 88,680 bp, and a small single-copy (SSC) region of 15,288 bp. It encoded 141 genes, including 87 protein-coding genes (79 PCG species), 46 tRNA genes (28 tRNA species), and 8 rRNA genes (4 rRNA species). The overall AT content was 63.92%. Phylogenetic analysis showed that A. villosum was closely related to two species Amomum kravanh and Amomum compactum within the genus Amomum in family Zingiberaceae.
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Project description:The first complete chloroplast genome of Hedychium coronarium (Zingiberaceae) was reported in this study. The H. coronarium chloroplast genome was 163,949 bp in length and comprised a pair of inverted repeat (IR) regions of 29,780 bp each, a large single-copy (LSC) region of 88,581 bp and a small single-copy (SSC) region of 15,808 bp. It encoded 141 genes, including 87 protein-coding genes (79 PCG species), 46 tRNA genes (28 tRNA species), and eight rRNA genes (four rRNA species). The nucleotide composition was asymmetric (31.68% A, 18.35% C, 17.74% G, 32.23% T) with an overall AT content of 63.92%. Phylogenetic analysis showed that H. coronarium was classified into a monophyletic group within the genus Hedychium in family Zingiberaceae.
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Project description:Artabotrys pilosus (Annonaceae) is endemic to China, this plant has high medicinal value and broad application prospect. In this study, we assembled and systematically analyzed the chloroplast genome of A. pilosus on the basis of DNA sequencing using high-throughput techniques. The chloroplast sequence of A. pilosus was 178,195 bp in length, including two inverted repeat regions of 42,150 bp, a large single-copy region of 90,797 bp and a small single-copy region of 3098 bp. It was predicted to contain 142 genes, of which 96 are coding, 38 are tRNA genes, and eight are rRNA genes. The overall GC content was 38.8%; this was higher in the IRs (40.4%) when compared to the LSC (37.6%) and the SSC (32%) regions. Phylogenetic analysis showed that A. pilosus is in subfamily Annonoideae.
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Project description: Not available
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Project description:Kosteletzkya pentacarpos is a promising plant being developed as a salt-tolerant biofuel crop that also the ability to fix heavy metals. Here, high-throughput sequencing technology was used to sequence and assemble the chloroplast genome of K. pentacarpos. The full length of the chloroplast genome is 161,777 bp, comprising a large single-copy region of 90,019 bp, a small single-copy region of 18,978 bp, and a pair of inverted repeats of 26,390 bp. A total of 113 genes were annotated, including 79 protein-coding, 30 transfer RNA, and 4 ribosomal RNA genes. Phylogenetic analysis based on whole chloroplast genome sequences showed that K. pentacarpos has a close relationship with Abelmoschus in Malvaceae. This study increases the available genomic information on K. pentacarpos, and provides a basis for the rational exploitation and utilization of germplasm resources.
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