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The complete mitochondrial genome of the striped hamster (Cricetulus barabesis) China and its phylogenetic analysis.

ABSTRACT: The complete mitogenome sequence of the striped hamster was determined using long PCR. The genome was 16,282?bp in length and contained 13 protein-coding genes, two ribosomal RNA genes, 22 transfer RNA genes, one origin of L strand replication, and one control region. The overall base composition of the heavy strand is A (33.7%), C (22.8%), T (30.5%), and G (13.0%). The base compositions present clearly the A-T skew, which is most obviously in the control region and protein-coding genes. Mitochondrial genome analyses based on MP, ML, NJ, and Bayesian analyses yielded identical phylogenetic trees. Results of phylogenetic analysis showed that Cricetulus had close relationship with Meriones. This study verifies the evolutionary status of the striped hamster in Cricetulus at the molecular level. The mitochondrial genome would be a significant supplement for the striped hamster genetic background. Results of phylogenetic analysis showed that the striped hamster had close relationship with C. griseus in Cricetulus.

SUBMITTER: Zhu L

PROVIDER: S-EPMC7706561 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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The complete mitochondrial genome of the striped hamster (<i>Cricetulus barabesis</i>) China and its phylogenetic analysis.

Zhu Liu L Ke-Song Qin Q Bo-Qi Li L Cheng-Wen Yu Y He Cai C Jun-Sheng Zhang Z Jin-Xun Li L Zhu Wang W

Mitochondrial DNA. Part B, Resources 20190716 2

The complete mitogenome sequence of the striped hamster was determined using long PCR. The genome was 16,282 bp in length and contained 13 protein-coding genes, two ribosomal RNA genes, 22 transfer RNA genes, one origin of L strand replication, and one control region. The overall base composition of the heavy strand is A (33.7%), C (22.8%), T (30.5%), and G (13.0%). The base compositions present clearly the A-T skew, which is most obviously in the control region and protein-coding genes. Mitocho ...[more]

PMID: 33365640

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Project description:IntroductionPrunus pedunculata (Prunoideae: Rosaceae), a relic shrub with strong resistance and multiple application values, is endangered in China. Extensive research had been devoted to gene expression, molecular markers, plastid genome analysis, and genetic background investigations of P. pedunculata. However, the mitochondrial genome of this species has not been systematically described, owing to the complexity of the plant mitogenome.MethodsIn the present research, the complete mitochondrial genome of P. pedunculata was assembled, annotated, and characterized. The genomic features, gene content and repetitive sequences were analyzed. The genomic variation and phylogenetic analysis have been extensively enumerated.Results and discussionThe P. pedunculata mitogenome is a circular molecule with a total length of 405,855 bp and a GC content of 45.63%, which are the smallest size and highest GC content among the known Prunus mitochondrial genomes. The mitogenome of P. pedunculata encodes 62 genes, including 34 unique protein-coding genes (PCGs, excluding three possible pseudogenes), three ribosomal RNA genes, and 19 transfer RNA genes. The mitogenome is rich in repetitive sequences, counting 112 simple sequence repeats, 15 tandem repeats, and 50 interspersed repetitive sequences, with a total repeat length of 11,793 bp, accounting for 2.91% of the complete genome. Leucine (Leu) was a predominant amino acid in PCGs, with a frequency of 10.67%, whereas cysteine (Cys) and tryptophan (Trp) were the least adopted. The most frequently used codon was UUU (Phe), with a relative synonymous codon usage (RSCU) value of 1.12. Selective pressure was calculated based on 20 shared PCGs in the mitogenomes of the 32 species, most of which were subjected to purifying selection (Ka/Ks < 1), whereas ccmC and ccmFn underwent positive selection. A total of 262 potential RNA editing sites in 26 PCGs were identified. Furthermore, 56 chloroplast-derived fragments were ascertained in the mitogenome, ranging from 30 to 858 bp, and were mainly located across IGS (intergenic spacer) regions or rRNA genes. These findings verify the occurrence of intracellular gene transfer events from the chloroplast to the mitochondria. Furthermore, the phylogenetic relationship of P. pedunculata was supported by the mitogenome data of 30 other taxa of the Rosaceae family. Understanding the mitochondrial genome characteristics of P. pedunculata is of great importance to promote comprehension of its genetic background and this study provides a basis for the genetic breeding of Prunus.

Dataset Information

The complete mitochondrial genome of the striped hamster (Cricetulus barabesis) China and its phylogenetic analysis.

Publications

The complete mitochondrial genome of the striped hamster (<i>Cricetulus barabesis</i>) China and its phylogenetic analysis.

Similar Datasets

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