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Sunday, October 25, 2020

PAG PacBio Workshop: Sequencing the Potentilla micrantha genome to study the evolution of fruiting in strawberry

Judson Ward, principal scientists at Driscoll’s Strawberries in California, introduces a genome assembly for Potentilla micrantha, which is closely related to strawberry but lacks fleshy ‘fruits’ or berries. Comparative genomics between P. micrantha and strawberry will yield significant information regarding the genetic mechanisms controlling fruit development. Using SMRT Sequencing Driscoll’s sequenced the 240 Mb P. micaranthagenome and produced a draft genome assembly, spanning the majority of the predicted sequence length. A comparison of sequence data produced using the Illumina HiSeq2000 and the PacBio RS platform demonstrated that PacBio sequencing produced a significantly longer N50 contig size and permitted a more complete genome…

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Sunday, October 25, 2020

PAG Conference: Wild rice genome sequences explain the evolution and domestication of Japonica and Indica rice

Robert Henry, Professor of Innovation in Agriculture and Director of the Queensland Alliance for Agriculture and Food Innovation at the University of Queensland, Australia, discusses how whole genome analysis of Australian wild rice is being used to better understand rice domestication, with the goal of making a diverse genetic resource available for increased rice food security worldwide. The wild “A genome” species represent an effective gene pool for rice. SMRT Sequencing and assembly of two taxon of wild Australian rice has allowed analysis of the relationships with this group. Domesticated rice (Oryza sativa ssp. japonica) nuclear genome shows close relationship…

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Tuesday, April 21, 2020

Decoding and analysis of organelle genomes of Indian tea (Camellia assamica) for phylogenetic confirmation.

The NCBI database has >15 chloroplast (cp) genome sequences available for different Camellia species but none for C. assamica. There is no report of any mitochondrial (mt) genome in the Camellia genus or Theaceae family. With the strong believes that these organelle genomes can play a great tool for taxonomic and phylogenetic analysis, we successfully assembled and analyzed cp and mt genome of C. assamica. We assembled the complete mt genome of C. assamica in a single circular contig of 707,441?bp length comprising of a total of 66 annotated genes, including 35 protein-coding genes, 29 tRNAs and two rRNAs. The…

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Tuesday, April 21, 2020

Complete chloroplast genome sequences of Kaempferia galanga and Kaempferia elegans: Molecular structures and comparative analysis.

Kaempferia galanga and Kaempferia elegans, which belong to the genus Kaempferia family Zingiberaceae, are used as valuable herbal medicine and ornamental plants, respectively. The chloroplast genomes have been used for molecular markers, species identification and phylogenetic studies. In this study, the complete chloroplast genome sequences of K. galanga and K. elegans are reported. Results show that the complete chloroplast genome of K. galanga is 163,811 bp long, having a quadripartite structure with large single copy (LSC) of 88,405 bp and a small single copy (SSC) of 15,812 bp separated by inverted repeats (IRs) of 29,797 bp. Similarly, the complete chloroplast…

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Tuesday, April 21, 2020

Complete chloroplast genome sequence of Hedychium coronarium

The first complete chloroplast genome of Hedychium coronarium (Zingiberaceae) was reported in this study. The H. coronarium chloroplast genome was 163,949bp in length and comprised a pair of inverted repeat (IR) regions of 29,780bp each, a large single-copy (LSC) region of 88,581bp and a small single-copy (SSC) region of 15,808bp. 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…

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Tuesday, April 21, 2020

Complete chloroplast genome of the plant Stahlianthus Involucratus (Zingiberaceae)

The first complete chloroplast genome of Stahlianthus involucratus (Zingiberaceae) was reported in this study. The S. involucratus chloroplast genome was 163,300bp in length and consisted of one large sin- gle copy (LSC) region of 87,498bp, one small single copy (SSC) region of 15,568bp, and a pair of inverted repeat (IR) regions 30,117bp. 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 phylogenetic analysis based on single nucleotide polymorphisms strongly supported that S. involucratus, Curcuma roscoeana and Curcuma longa formed a cluster in group CurcumaII…

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Tuesday, April 21, 2020

Complete chloroplast genome sequence of Amomum villosum

The first complete chloroplast genome of Amomum villosum (Zingiberaceae) was reported in this study. The A. villosum genome was 163,608bp in length, and comprised a pair of inverted repeat (IR) regions of 29,820bp each, a large single-copy (LSC) region of 88,680bp, and a small single-copy (SSC) region of 15,288bp. 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…

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Tuesday, April 21, 2020

Complete chloroplast genome sequence of Carthamus tinctorius L. from PacBio Sequel Platform

Carthamus tinctorius L, also known as safflower, is an important oil crop planted worldwide. The com- plete chloroplast (cp) genome was reported in this study using the PacBio Sequel Platform. The cp genome with a total size of 152,963bp consisted of two inverted repeats (25,128bp) separated by a large single-copy region (84,124bp) and a small single-copy region (18,583bp). Further annotation revealed the cp genome contains 112 genes, including 79 protein-coding genes, 29 tRNA genes, and 4 rRNA genes. The information of the cp genome will be useful for investigation of evolution and molecular breeding of safflower in the future.

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Tuesday, April 21, 2020

The complete chloroplast genome sequence of watercress (Nasturtium officinale R. Br.): Genome organization, adaptive evolution and phylogenetic relationships in Cardamineae.

Watercress (Nasturtium officinale R. Br.), an aquatic leafy vegetable of the Brassicaceae family, is known as a nutritional powerhouse. Here, we de novo sequenced and assembled the complete chloroplast (cp) genome of watercress based on combined PacBio and Illumina data. The cp genome is 155,106?bp in length, exhibiting a typical quadripartite structure including a pair of inverted repeats (IRA and IRB) of 26,505?bp separated by a large single copy (LSC) region of 84,265?bp and a small single copy (SSC) region of 17,831?bp. The genome contained 113 unique genes, including 79 protein-coding genes, 30 tRNAs and 4 rRNAs, with 20 duplicate…

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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

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

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

Mitochondrial and chloroplast genomes provide insights into the evolutionary origins of quinoa (Chenopodium quinoa Willd.).

Quinoa has recently gained international attention because of its nutritious seeds, prompting the expansion of its cultivation into new areas in which it was not originally selected as a crop. Improving quinoa production in these areas will benefit from the introduction of advantageous traits from free-living relatives that are native to these, or similar, environments. As part of an ongoing effort to characterize the primary and secondary germplasm pools for quinoa, we report the complete mitochondrial and chloroplast genome sequences of quinoa accession PI 614886 and the identification of sequence variants in additional accessions from quinoa and related species. This…

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Tuesday, April 21, 2020

Comparative genomic and phylogenetic analyses of Populus section Leuce using complete chloroplast genome sequences

Species of Populus section Leuce are distributed throughout most parts of the Northern Hemisphere and have important economic and ecological significance. However, due to frequent hybridization within Leuce, the phylogenetic relationship between species has not been clarified. The chloroplast (cp) genome is characterized by maternal inheritance and relatively conservative mutation rates; thus, it is a powerful tool for building phylogenetic trees. In this study, we used the PacBio SEQUEL software to determine that the cp genome of Populus tomentosa has a length of 156,558 bp including a long single-copy region (84,717 bp), a small single-copy region (16,555 bp), and a…

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Sunday, September 22, 2019

The complete chloroplast genome of Chrysanthemum boreale (Asteraceae)

Chrysanthemum boreale is a perennial plant in the Asteraceae family that is native to eastern Asia and has both ornamental and herbal uses. Here, we determined the complete chloroplast genome sequence for C. boreale using long-read sequencing. The chloroplast genome was 151,012?bp and consisted of a large single copy (LSC) region (82,817?bp), a small single copy (SSC) region (18,281?bp) and two inverted repeats (IRs) (24,957?bp). It was predicted to contain 131 genes, including 87 protein-coding genes, eight rRNAs and 46 tRNAs. Phylogenetic analysis of chloroplast genomes clustered C. boreale with other Chrysanthemum and Asteraceae species.

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