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Whole-genome sequencing of the Pirarucu (Arapaima gigas)

ABSTRACT: Whole-genome sequencing of the Pirarucu (Arapaima gigas).

PROVIDER: PRJEB22808 | ENA |

REPOSITORIES: ENA

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Dataset's files

Source:

			Action	DRS
		Other
	UFQX01.dat.gz	Other
	UFQX01.fasta.gz	Fasta.gz
	UFQX01.master.dat	Other
	ERR2143720_1.fastq.gz	Fastqsanger.gz

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Transcriptomic analyses reveal genes with sexual dimorphic expression in the Arapaima gigas gonads and brain

Project description:Pirarucu (Arapaima gigas, or A. gigas) is a native fish species to Amazon basin and, economically important in the Brazilian Amazonian for its great potential to aquaculture. In the natural environment the A. gigas is captured only in the sustainable development reserves of the State of Amazonas by applying a system of rotation in fishing in order to avoid overfishing of this important fishing resource. The reproductive biology of A. gigas has long been intriguing; however, very little is known about the molecular pathways underlying their sexual differentiation and determination. Using the SOLiD sequencing platform, a total of 432,058,560 short sequencing reads were produced. An average of ~30% of sequencing reads could be mapped to Asian arowana reference cDNAs. 305 genes showed higher expression in female brain against 8 gene with higher expressing in male brain. In gonad, there are 120 genes higher expressed in female against 10 gene higher expressed in male.

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Arapaima gigas population genetic study

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Whole Genome Sequencing of the Pirarucu (Arapaima gigas) Supports Independent Emergence of Major Teleost Clades.

Project description:The Pirarucu (Arapaima gigas) is one of the world's largest freshwater fishes and member of the superorder Osteoglossomorpha (bonytongues), one of the oldest lineages of ray-finned fishes. This species is an obligate air-breather found in the basin of the Amazon River with an attractive potential for aquaculture. Its phylogenetic position among bony fishes makes the Pirarucu a relevant subject for evolutionary studies of early teleost diversification. Here, we present, for the first time, a draft genome version of the A. gigas genome, providing useful information for further functional and evolutionary studies. The A. gigas genome was assembled with 103-Gb raw reads sequenced in an Illumina platform. The final draft genome assembly was ∼661 Mb, with a contig N50 equal to 51.23 kb and scaffold N50 of 668 kb. Repeat sequences accounted for 21.69% of the whole genome, and a total of 24,655 protein-coding genes were predicted from the genome assembly, with an average of nine exons per gene. Phylogenomic analysis based on 24 fish species supported the postulation that Osteoglossomorpha and Elopomorpha (eels, tarpons, and bonefishes) are sister groups, both forming a sister lineage with respect to Clupeocephala (remaining teleosts). Divergence time estimations suggested that Osteoglossomorpha and Elopomorpha lineages emerged independently in a period of ∼30 Myr in the Jurassic. The draft genome of A. gigas provides a valuable genetic resource for further investigations of evolutionary studies and may also offer a valuable data for economic applications.

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Transcriptome sequencing of Pacific oyster Crassostrea gigas

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Project description:Deep sequencing of mRNA from Pacific oyster Crassostrea gigas Competent larvae of Crassostrea gigas were treated with epinephrine solution, and then sampled at different time intervals. For shell damage experiment, shell were broken and then tissues were sampled at different time intervals.

2014-07-26 | E-GEOD-31011 | biostudies-arrayexpress

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