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Tuesday, April 21, 2020

The re-sequencing and re-assembly of complete chloroplast genome of Melastoma dodecandrum (Melastomataceae) from Fujian, China

The plant genus Melastoma of the family Melastomataceae is comprised of nine species and one var- iety in China. Melastoma dodecandrum is the only creeping species of this genus. Previous study has reported the complete chloroplast genome of M. dodecandrum from Guangzhou, China, but there may be some differences between plant populations from different regions. Herein, we reported the com- plete chloroplast genome of M. dodecandrum from Fuzhou, China, which was assembled from Pacbio and whole genome data was sequenced. The sequence has a circular molecular length of 156,598bp and contained 129 genes. Phylogenetic analysis indicated that M. dodecandrum was…

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Tuesday, April 21, 2020

The complete mitochondrial genome of the New Zealand parasitic roundworm Haemonchus contortus (Trichostrongyloidea: Haemonchidae) field strain NZ_Hco_NP

The complete mitochondrial genome of the New Zealand parasitic nematode Haemonchus contortus field strain NZ_Hco_NP was sequenced and annotated. The 14,001bp-long mitogenome contains 12 protein-coding genes (atp8 gene missing), two ribosomal RNAs, 22 transfer RNAs, and a 583bp non- coding region. Phylogenetic analysis showed that H. contortus NZ_Hco_NP forms a monophyletic clus- ter with the remaining three Haemonchidae species, and further illustrates the high levels of diversity and gene flow among Trichostrongylidae.

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Tuesday, April 21, 2020

The complete mitochondrial genome of the tartar Sand Boa Eryx tataricus

Eryx is a genus of snakes belonging to the family Boidae. In this study, the mitochondrial genome sequence of Eryx tataricus was generated using a PacBio RSII DNA sequencer employing the single mol- ecule, real-time sequencing technology. A maximum-likelihood (ML) phylogenetic tree of 26 snakes was re-constructed based on the 13 protein-coding genes for convincing the mitochondrial DNA sequences.

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Tuesday, April 21, 2020

Ancestral Admixture Is the Main Determinant of Global Biodiversity in Fission Yeast.

Mutation and recombination are key evolutionary processes governing phenotypic variation and reproductive isolation. We here demonstrate that biodiversity within all globally known strains of Schizosaccharomyces pombe arose through admixture between two divergent ancestral lineages. Initial hybridization was inferred to have occurred ~20-60 sexual outcrossing generations ago consistent with recent, human-induced migration at the onset of intensified transcontinental trade. Species-wide heritable phenotypic variation was explained near-exclusively by strain-specific arrangements of alternating ancestry components with evidence for transgressive segregation. Reproductive compatibility between strains was likewise predicted by the degree of shared ancestry. To assess the genetic determinants of ancestry block distribution across…

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Tuesday, April 21, 2020

The complete mitochondrial genome of the tree frog, Polypedates braueri (Anura, Rhacophoridae)

We determined the complete mitochondrial genome of the tree frog, Polypedates braueri using next generation sequencing (NGS) and Sanger sequencing. The mitogenome of P. braueri was 19,904?bp in length, which contained 12 protein-coding genes, 22 tRNAs, two rRNAs, and two control regions (D-Loop). A noncoding sequence (NC) was discovered between tRNALys and ATP6 gene, as well as replaced the original position of ATP8 gene. The ND5 gene was found between the two control regions. More mitochondrial genomic information will contribute to revealing the phylogenetic relationships among species of the genus Polypedates.

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Tuesday, April 21, 2020

The complete mitogenome of clam Corbicula fluminea determined using next-generation and PacBio sequencing

Corbicula fluminea is an important aquatic commercial species in China. In this study, we present the complete mitogenome and a phylogenetic analysis of C. fluminea, determined using next-generation and PacBio long read sequencing. The mitogenome of C. fluminea is 17,423bp in size, including 13 protein-coding genes, two ribosomal RNA genes, 22 tRNA genes, and a putative control region, all located on the same strand. The base composition of the entire mitogenome showed a conspicuous AþT bias of 70.5 %. The entire mitogenome data produced in this study provides the genomic resour- ces available for future evolutionary studies.

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Tuesday, April 21, 2020

Complete mitochondrial genome of a Chinese oil tree yellowhorn, Xanthoceras sorbifolium (Sapindales, Sapindaceae)

Xanthoceras sorbifolium is an important woody oil seed tree in North China. In this study, the complete mitochondrial genome of X. sorbifolium was sequenced using Illumina Hiseq and PacBio sequencing technique. The mitogenome is 575,633bp in length and the GC content is 45.71%. The genome con- sists of 42 protein-coding genes, 4 ribosomal-RNA genes, and 24 transfer-RNA genes. Phylogenetic ana- lysis based on protein-coding genes showed that X. sorbifolium was close with the species in Bombacaceae and Malvaceae family.

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Tuesday, April 21, 2020

The complete mitochondrial genome sequences of Senna tora (Fabales: Fabaceae)

Cassia tora (Senna tora), known as an economically important plant, is medicinal in nature and belongs to the Fabaceae family. The complete mitochondrial genome sequences of S. tora were 566,589bp in length with a 45.23% GC content. A total of 63 genes were annotated including 36 protein-coding genes, 22 tRNA genes, and 5 rRNA genes. Phylogenetic tree based on the mitochondrial genome dem- onstrated that S. tora was most closely related to the Senna occidentalis and Caesalpinioideae subfamily and is definitely separated from the Faboideae subfamily.

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Tuesday, April 21, 2020

Genome of the Komodo dragon reveals adaptations in the cardiovascular and chemosensory systems of monitor lizards.

Monitor lizards are unique among ectothermic reptiles in that they have high aerobic capacity and distinctive cardiovascular physiology resembling that of endothermic mammals. Here, we sequence the genome of the Komodo dragon Varanus komodoensis, the largest extant monitor lizard, and generate a high-resolution de novo chromosome-assigned genome assembly for V. komodoensis using a hybrid approach of long-range sequencing and single-molecule optical mapping. Comparing the genome of V. komodoensis with those of related species, we find evidence of positive selection in pathways related to energy metabolism, cardiovascular homoeostasis, and haemostasis. We also show species-specific expansions of a chemoreceptor gene family related…

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Tuesday, April 21, 2020

The mitochondrial genome analysis of Isaria tenuipes (Hypocreales: Cordycipitaceae)

The mitochondrial genome of Isaria tenuipes, strain TTZ2017-3, was sequenced on the Illumina Hiseq 4000 and the PacBio Sequel Sequencer and annotated. The genome is 66703bp in length, encoding 15 conserved protein-coding genes (PCGs) including ribosomal protein S3, two rRNA genes and 26 tRNA genes. The nucleotide composition of I. tenuipes mitochondrial genome was 39.1% of A, 35.6% of T, 11.2% of C, 14.2% of G, 74.7% of AþT content. Phylogenetic analysis with other Hypocreales species revealed that I. tenuipes was more closely related to Cordyceps militaris, separated from Lecanicillium muscarium, Paecilomyces hepialid, and Beauveria species with Cordyceps teleomorph. This…

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Tuesday, April 21, 2020

Chloroplast genome of Dalbergia cochinchinensis (Fabaceae), a rare and Endangered rosewood species in Southeast Asia

Dalbergia cochinchinensis is an tree species in Southeast Asia, its wood and wood products are incred- ibly valuable and are also of important medicinal value. In this study, its chloroplast genome was char- acterized using next generation Illumina pair-end and Pacbio sequencing dataset. The whole genome was 156,576bp in length and contains a pair of 25,682bp inverted repeat regions, which were sepa- rated by a large single copy region and a small single copy region of 85,886 and 19,326bp in length, respectively. The cp genome contained 111 genes, including 77 protein-coding genes, 30 tRNAs and 4 rRNAs. A neighbor-joining phylogenetic…

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Tuesday, April 21, 2020

Characterization and phylogenetic analysis of the complete chloroplast genome sequence of Costus viridis (Costaceae)

The first complete chloroplast genome of Costus viridis (Costaceae) was reported in the current study. The C. viridis genome was 168,966bp in length and comprised a pair of inverted repeat (IR) regions of 29,166bp each, a large single-copy (LSC) region of 92,189bp, and a small single-copy (SSC) region of 18,445bp. It encoded 133 genes, including 87 protein-coding genes (79 PCG species), 38 tRNA genes (28 tRNA species), and eight rRNA genes (four rRNA species). The overall AT content was 63.75%. Phylogenetic analysis showed that C. viridis was closely related to species Costus osae within the genus Costus in family Costaceae.

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Tuesday, April 21, 2020

Insights into the evolution and drug susceptibility of Babesia duncani from the sequence of its mitochondrial and apicoplast genomes.

Babesia microti and Babesia duncani are the main causative agents of human babesiosis in the United States. While significant knowledge about B. microti has been gained over the past few years, nothing is known about B. duncani biology, pathogenesis, mode of transmission or sensitivity to currently recommended therapies. Studies in immunocompetent wild type mice and hamsters have shown that unlike B. microti, infection with B. duncani results in severe pathology and ultimately death. The parasite factors involved in B. duncani virulence remain unknown. Here we report the first known completed sequence and annotation of the apicoplast and mitochondrial genomes of…

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Tuesday, April 21, 2020

Improvement of the Pacific bluefin tuna (Thunnus orientalis) reference genome and development of male-specific DNA markers.

The Pacific bluefin tuna, Thunnus orientalis, is a highly migratory species that is widely distributed in the North Pacific Ocean. Like other marine species, T. orientalis has no external sexual dimorphism; thus, identifying sex-specific variants from whole genome sequence data is a useful approach to develop an effective sex identification method. Here, we report an improved draft genome of T. orientalis and male-specific DNA markers. Combining PacBio long reads and Illumina short reads sufficiently improved genome assembly, with a 38-fold increase in scaffold contiguity (to 444 scaffolds) compared to the first published draft genome. Through analysing re-sequence data of 15…

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Tuesday, April 21, 2020

Whole genome sequence and de novo assembly revealed genomic architecture of Indian Mithun (Bos frontalis).

Mithun (Bos frontalis), also called gayal, is an endangered bovine species, under the tribe bovini with 2n?=?58 XX chromosome complements and reared under the tropical rain forests region of India, China, Myanmar, Bhutan and Bangladesh. However, the origin of this species is still disputed and information on its genomic architecture is scanty so far. We trust that availability of its whole genome sequence data and assembly will greatly solve this problem and help to generate many information including phylogenetic status of mithun. Recently, the first genome assembly of gayal, mithun of Chinese origin, was published. However, an improved reference genome…

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