The genome and transcriptome of the Antarctic toothfish Dissostichus mawsoni

The Antarctic toothfish Dissostichus mawsoni can grow to giant sizes (2.0 m in length and 140 kg in mass) and is an iconic species of the Antarctic notothenioid radiation, with wide distributions in freezing waters of high latitude Antarctic coasts, as far south as 77.5o 107 S, the southern limit of...

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Bibliographic Details
Main Authors: Chi-Hing, Cheng Christina, Jian, Wang, Katherine, Murphy R, Kevin, Bilyk T, Liangbiao, Chen, Hune Mathias, Mengchao, Yu, Qianghua, Xu, Shouwen, Jiang, Sihua, Peng, Wanying, Zhai, Wen, Wang, Wenhao, Li, Xuan, Zhuang, Yandong, Ren, Yanxia, Fu, Ying, Lu
Format: Dataset
Language:English
Published: GigaScience Database 2019
Subjects:
Genomic
Transcriptomic
adaptive radiation
climate change
genome
oxidative stress
antarctic notothenioids
Antarctic
The Antarctic
Antarc*
Antarctic Toothfish
Online Access:https://dx.doi.org/10.5524/102162
http://gigadb.org/dataset/102162
Description
Summary:The Antarctic toothfish Dissostichus mawsoni can grow to giant sizes (2.0 m in length and 140 kg in mass) and is an iconic species of the Antarctic notothenioid radiation, with wide distributions in freezing waters of high latitude Antarctic coasts, as far south as 77.5o 107 S, the southern limit of Antarctic marine life. It thus exemplifies the stenothermal cold-adapted character state. Despite its large size, it is the only notothenioid species that achieved complete neutral buoyancy as adults; thus this species serves as the best model for examining the evolutionary underpinning of secondary pelagicism in the Antarctic clade. Here we provide the chromosome-level genome assembly of D.mawsoni using the Illumina, PacBio, and Hi-C sequencing data. A total of ~107Gb of raw data covering the predicted genome length ~840Mb to ~ 139× read depth. The de novo genome assembly of ~757 Mb generated a scaffold N50 of ~2.2Mb with 22,516 intact predicted protein-coding gene models. BUSCO evaluation demonstrated that the genome completeness reached 97.2%. Additionally we demonstrat expression profiles and sequence variations with RNA seq data from 13 tissues (liver, gill, stomach, white muscle, red muscle, skin, small intestine, brain, head kidney, caudal kidney, spleen, and ovary ).

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