Search

In this study, the complete mitochondrial genome of Chionodraco rastrospinosus was obtained, which was 17598 bp including 2 ribosomal RNAs, 13 protein-coding genes, 22 transfer RNAs, and a non-coding control region. The length of D-loop was 1332 bp and its contents of A, T, C, and G were 30.3%, 27.6%, 26.8%, and 15.3%. The complete mtDNA sequences of C. rastrospinosus and other 14 species were used to reconstruct the phylogenetic tree, suggested that C. rastrospinosus was closest to two species of Chionodraco. The study would provide a basic data for further research on population structure, conservation genetics and molecular evolution of C. rastrospinosus.

In this study, the complete mitochondrial genome of Neopagetopsis ionah was obtained, which was 17,634 bp including two ribosomal RNAs, 13 protein-coding genes, 22 transfer RNAs, and a non-coding control region. In 13 protein-coding genes, there types of initiation codon (ATC, ATG, and GTG) and four types of stop codons (TAA, TAG, TA, and T) were identified. Among the 22 transfer RNAs, eight tRNAs were encoded by L-strand. The length of D-loop was 1519 bp and its contents of A, T, C, and G were 26.9%, 27.6%, 17.5%, and 30%, respectively. The complete mtDNA sequences of N. ionah and other 13 species were used to reconstruct the phylogenetic tree suggested that N. ionah was closest to some species of Channichthyidae. The study would provide a basic data for further research on population structure, conservation genetics and molecular evolution of N. ionah.

The complete mitochondrial genome of Electrona carlsbergi was obtained, which was 18,282 bp in size and including 13 protein-coding genes, 2 ribosomal RNAs, 23 transfer RNAs and 1 control region. The overall nucleotide composition is 27.92% for A, 24.66% for T, 30.90% for C and 16.52% for G. Among 23 tRNA genes, 8 tRNAs were encoded on the L-strand. Further, the phylogenetic tree, which based on complete mtDNA sequences, revealed that the E. carlsbergi was genetically closest to species E. antarctica and Krefftichthys anderssoni. This study could provide a basic data for the studies on evolution for low temperature adaptability, stock evaluation and conservation genetics.

Modern molecular approaches have vastly improved diagnostic capabilities for differentiating among species of chicken infecting Eimeria . Consolidating information from multiple genetic markers, adding additional poultry Eimeria species and increasing the size of available data-sets is improving the resolving power of the DNA, and consequently our understanding of the genus. This study adds information from 25 complete mitochondrial DNA genomes from Australian chicken Eimeria isolates representing all 10 species known to occur in Australia, including OTU-X, −Y and −Z. The resulting phylogeny provides a comprehensive view of species relatedness highlighting where the OTUs align with respect to others members of the genus. All three OTUs fall within the Eimeria clade that contains only chicken-infecting species with close affinities to E. maxima , E. brunetti and E. mitis . Mitochondrial genetic diversity was low among Australian isolates likely reflecting their recent introduction to the country post-European settlement. The lack of observed genetic diversity is a promising outcome as it suggests that the currently used live vaccines should continue to offer widespread protection against Eimeria outbreaks in all states and territories. Flocks were frequently found to host multiple strains of the same species, a factor that should be considered when studying disease epidemiology in the field. [ABSTRACT FROM AUTHOR]

Gymnodraco acuticepsis is an Antarctic fish living in the Southern Ocean. Until now, studies on G. acuticeps are still limited. As an Antarctic fish, obtaining and characterization of the mitochondrial genome of G. acuticeps will be important for elucidation of the mechanism of cold-adapting evolution in mitochondrion. In this study, we first isolated and characterized the mitochondrial genome sequence of G. acuticeps with 15,987 bp in length. It contained of 34 genes (12 protein-coding genes, 20 transfer RNA genes, 2 ribosomal RNA genes) and a partial putative control region. Gene organization and nucleotide composition of obtained mito-genome were similar to those of other Antarctic fish. Twenty-eight genes were encoded by heavy strand, while six genes were encoded by light strand. Further, the phylogenetic tree, which based on 12 protein-coding genes, revealed that the G. acuticeps was genetically closest to species Parachaenichthys charcoti among 18 species. We hope this work would be helpful for the population genetics and molecular evolution studies.

In this study, the complete mitochondrial genome of Neopagetopsis ionah was obtained, which was 17,634 bp including two ribosomal RNAs, 13 protein-coding genes, 22 transfer RNAs, and a non-coding control region. In 13 protein-coding genes, there types of initiation codon (ATC, ATG, and GTG) and four types of stop codons (TAA, TAG, TA, and T) were identified. Among the 22 transfer RNAs, eight tRNAs were encoded by L-strand. The length of D-loop was 1519 bp and its contents of A, T, C, and G were 26.9%, 27.6%, 17.5%, and 30%, respectively. The complete mtDNA sequences of N. ionah and other 13 species were used to reconstruct the phylogenetic tree suggested that N. ionah was closest to some species of Channichthyidae. The study would provide a basic data for further research on population structure, conservation genetics and molecular evolution of N. ionah. [ABSTRACT FROM AUTHOR]

In this study, the complete mitochondrial genome of Chionodraco rastrospinosus was obtained, which was 17598 bp including 2 ribosomal RNAs, 13 protein-coding genes, 22 transfer RNAs, and a non-coding control region. The length of D-loop was 1332 bp and its contents of A, T, C, and G were 30.3%, 27.6%, 26.8%, and 15.3%. The complete mtDNA sequences of C. rastrospinosus and other 14 species were used to reconstruct the phylogenetic tree, suggested that C. rastrospinosus was closest to two species of Chionodraco. The study would provide a basic data for further research on population structure, conservation genetics and molecular evolution of C. rastrospinosus. [ABSTRACT FROM AUTHOR]

The complete mitochondrial genome of Electrona carlsbergi was obtained, which was 18,282 bp in size and including 13 protein-coding genes, 2 ribosomal RNAs, 23 transfer RNAs and 1 control region. The overall nucleotide composition is 27.92% for A, 24.66% for T, 30.90% for C and 16.52% for G. Among 23 tRNA genes, 8 tRNAs were encoded on the L-strand. Further, the phylogenetic tree, which based on complete mtDNA sequences, revealed that the E. carlsbergi was genetically closest to species E. antarctica and Krefftichthys anderssoni. This study could provide a basic data for the studies on evolution for low temperature adaptability, stock evaluation and conservation genetics. [ABSTRACT FROM AUTHOR]

Gymnodraco acuticepsis is an Antarctic fish living in the Southern Ocean. Until now, studies on G. acuticeps are still limited. As an Antarctic fish, obtaining and characterization of the mitochondrial genome of G. acuticeps will be important for elucidation of the mechanism of cold-adapting evolution in mitochondrion. In this study, we first isolated and characterized the mitochondrial genome sequence of G. acuticeps with 15,987 bp in length. It contained of 34 genes (12 protein-coding genes, 20 transfer RNA genes, 2 ribosomal RNA genes) and a partial putative control region. Gene organization and nucleotide composition of obtained mito-genome were similar to those of other Antarctic fish. Twenty-eight genes were encoded by heavy strand, while six genes were encoded by light strand. Further, the phylogenetic tree, which based on 12 protein-coding genes, revealed that the G. acuticeps was genetically closest to species Parachaenichthys charcoti among 18 species. We hope this work would be helpful for the population genetics and molecular evolution studies. [ABSTRACT FROM AUTHOR]

In this study, the complete mitochondrial genome of Neopagetopsis ionah was obtained, which was 17,634 bp including two ribosomal RNAs, 13 protein-coding genes, 22 transfer RNAs, and a non-coding control region. In 13 protein-coding genes, there types of initiation codon (ATC, ATG, and GTG) and four types of stop codons (TAA, TAG, TA, and T) were identified. Among the 22 transfer RNAs, eight tRNAs were encoded by L-strand. The length of D-loop was 1519 bp and its contents of A, T, C, and G were 26.9%, 27.6%, 17.5%, and 30%, respectively. The complete mtDNA sequences of N. ionah and other 13 species were used to reconstruct the phylogenetic tree suggested that N. ionah was closest to some species of Channichthyidae. The study would provide a basic data for further research on population structure, conservation genetics and molecular evolution of N. ionah ., Competing Interests: No potential conflict of interest was reported by the authors., (© 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

In this study, the complete mitochondrial genome of Chionodraco rastrospinosus was obtained, which was 17598 bp including 2 ribosomal RNAs, 13 protein-coding genes, 22 transfer RNAs, and a non-coding control region. The length of D-loop was 1332 bp and its contents of A, T, C, and G were 30.3%, 27.6%, 26.8%, and 15.3%. The complete mtDNA sequences of C. rastrospinosus and other 14 species were used to reconstruct the phylogenetic tree, suggested that C. rastrospinosus was closest to two species of Chionodraco. The study would provide a basic data for further research on population structure, conservation genetics and molecular evolution of C. rastrospinosus ., Competing Interests: No potential conflict of interest was reported by the authors., (© 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

The complete mitochondrial genome of Electrona carlsbergi was obtained, which was 18,282 bp in size and including 13 protein-coding genes, 2 ribosomal RNAs, 23 transfer RNAs and 1 control region. The overall nucleotide composition is 27.92% for A, 24.66% for T, 30.90% for C and 16.52% for G. Among 23 tRNA genes, 8 tRNAs were encoded on the L-strand. Further, the phylogenetic tree, which based on complete mtDNA sequences, revealed that the E. carlsbergi was genetically closest to species E. antarctica and Krefftichthys anderssoni. This study could provide a basic data for the studies on evolution for low temperature adaptability, stock evaluation and conservation genetics., Competing Interests: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper. This work was supported by the Sub-project under National Science & Technology Support Plan (No. 2013BAD13B03), and the Chinese National Antarctic Research Expedition (CHINARE2014-01-06)., (© 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)

Gymnodraco acuticeps is is an Antarctic fish living in the Southern Ocean. Until now, studies on G. acuticeps are still limited. As an Antarctic fish, obtaining and characterization of the mitochondrial genome of G. acuticeps will be important for elucidation of the mechanism of cold-adapting evolution in mitochondrion. In this study, we first isolated and characterized the mitochondrial genome sequence of G. acuticeps with 15,987 bp in length. It contained of 34 genes (12 protein-coding genes, 20 transfer RNA genes, 2 ribosomal RNA genes) and a partial putative control region. Gene organization and nucleotide composition of obtained mito-genome were similar to those of other Antarctic fish. Twenty-eight genes were encoded by heavy strand, while six genes were encoded by light strand. Further, the phylogenetic tree, which based on 12 protein-coding genes, revealed that the G. acuticeps was genetically closest to species Parachaenichthys charcoti among 18 species. We hope this work would be helpful for the population genetics and molecular evolution studies., Competing Interests: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper., (© 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.)