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The characteristics of the chloroplast genome of the Michelia chartacea (Magnoliaceae).

ABSTRACT: In this study, the complete chloroplast genome of Michelia chartacea B. L. Chen & S. C. Yang was 160,138 bp in length. It includes a large single-copy (LSC) region of 88,164 bp, a small single-copy region (SSC) of 18,824 bp, and with a pair of inverted repeats (IRs) of 26,575 bp. The GC content in the chloroplast genome was 39.23%. In total, 130 genes in the chloroplast genome of Michelia chartacea were annotated, including 83 protein-coding genes, 38 tRNA genes, and eight rRNA genes. The phylogenetic analysis showed that M. chartacea was closely related with M. martini and M. maudiae, forming a clade included in Michelia.

SUBMITTER: Li Y

PROVIDER: S-EPMC7889203 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Characterization of the complete chloroplast genome of Michelia maudiae (Magnoliaceae).

Project description:Michelia maudiae is an evergreen ornamental shrub with strong aromatic flowers with great important for horticulture. In this study, the complete chloroplast genome of M. maudiae was assembled based on the Illumina sequences. The genome was 160,154 bp in length presenting a typical quadripartite structure and contains an inverted repeat region (IR, 26,575 bp), a large single copy region (LSC, 88,200 bp) and a small single copy region (SSC, 18,804 bp). The overall GC content was 39.24%. A total of 130 genes were identified, including 83 protein-coding genes, 38 transfer RNA genes, and eight rRNA genes. Twelve gene species contained one or two introns. The maximum-likelihood phylogenetic analysis revealed that M. maudiae was closely related with Manglietia insignis.

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The chloroplast genome sequence of Michelia alba (Magnoliaceae), an ornamental tree species.

Project description:Magnoliaceae are both economically and ornamentally important trees. Despite extensive studies in this family, the taxonomy of Michelia L. remains unclear, as well as the taxonomical status of Michelia alba. Herein, we report the complete chloroplast genome of M. alba DC. The chloroplast genome was 159,789?bp in length, with a large single-copy (LSC) region of 87,951?bp and a small single-copy (SSC) region of 18,798?bp, separated by two inverted repeat (IRs) regions of 26,570?bp. It contained 156 genes, including 83 coding genes, 68 tRNA genes, and 8 rRNA genes. The overall GC content was 39.3%, and 43.2%, 38.0%, 34.3%, in the IRs, LSC, and SSC regions, respectively. A phylogenetic analysis showed that M. alba is closely related to M. odora, with the genus Michelia nested inside Magnolia.

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Complete chloroplast genome sequence of Michelia champaca var. champaca Linnaeus, an ornamental tree species of Magnoliaceae.

Project description:Michelia champaca var. champaca is an ornamentally important tree in Magnoliaceae. The paper reported the complete chloroplast genome (cpDNA) of M. champaca var. champaca and its basic annotated information. The size of cpDNA is 160,008 bp, with a typical quadripartite structure of a large single-copy (LSC) region of 88,037 bp and a small single-copy (SSC) region of 18,809 bp separated by a pair identical inverted repeat regions (IRs) of 26,581 bp each. The genome contained 131 genes (113 unique), including 86 protein-coding genes (80 unique), 37 tRNA genes (29 unique), and eight rRNA genes (four unique). Phylogenetic analysis showed that M. champaca var. champaca is affinal to M. baillonii and they form a nomophyletic group with other eight Michelia species. This Michelia clade is sister to the Aromadendron cathcartii clade with high support. All genera mentioned in this analysis are nomophyletic under the system of Magnoliaceae by Sima and Lu.

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Inferring Genetic Variation and Demographic History of Michelia yunnanensis Franch. (Magnoliaceae) from Chloroplast DNA Sequences and Microsatellite Markers.

Project description:Michelia yunnanensis Franch., is a traditional ornamental, aromatic, and medicinal shrub that endemic to Yunnan Province in southwest China. Although the species has a large distribution pattern and is abundant in Yunnan Province, the populations are dramatically declining because of overexploitation and habitat destruction. Studies on the genetic variation and demography of endemic species are necessary to develop effective conservation and management strategies. To generate such knowledge, we used 3 pairs of universal cpDNA markers and 10 pairs of microsatellite markers to assess the genetic diversity, genetic structure, and demographic history of 7 M. yunnanensis populations. We calculated a total of 88 alleles for 10 polymorphic loci and 10 haplotypes for a combined 2,089 bp of cpDNA. M. yunnanensis populations showed high genetic diversity (Ho = 0.551 for nuclear markers and Hd = 0.471 for cpDNA markers) and low genetic differentiation (FST = 0.058). Geographical structure was not found among M. yunnanensis populations. Genetic distance and geographic distance were not correlated (P > 0.05), which indicated that geographic isolation is not the primary cause of the low genetic differentiation of M. yunnanensis. Additionally, M. yunnanensis populations contracted ~20,000-30,000 years ago, and no recent expansion occurred in current populations. Results indicated that the high genetic diversity of the species and within its populations holds promise for effective genetic resource management and sustainable utilization. Thus, we suggest that the conservation and management of M. yunnanensis should address exotic overexploitation and habitat destruction.

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The complete chloroplast genome sequence of Michelia balansae var. balansae (Aug. Candolle) Dandy, a timber and spices species in Magnoliaceae.

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