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A chromosome-level genome assembly of the yellowfin seabream (Acanthopagrus latus; Hottuyn, 1782) provides insights into its osmoregulation and sex reversal

文献类型： 外文期刊

作者： Zhu, Ke-Cheng 1 ; Zhang, Nan 1 ; Liu, Bao-Suo 1 ; Guo, Liang 1 ; Guo, Hua-Yang 1 ; Jiang, Shi-Gui 1 ; Zhang, Dian-Chan 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploit, Minist Agr & Rural Affairs, 231 Xingang Rd West, Guangzhou 510300, Guangdong, Peoples R China

2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Guangdong, Peoples R China

3.Chinese Acad Fishery Sci, Trop Aquaculture Res & Dev Ctr, South China Sea Fisheries Res Inst, Sanya 572018, Peoples R China

4.Guangdong Prov Engineer Technol Res Ctr Marine Bi, Guangzhou, Guangdong, Peoples R China

5.Sanya Trop Fisheries Res Inst, Sanya, Hainan, Peoples R China

关键词： Acanthopagrus latus; Chromosomal assembly; Genome annotation; Osmoregulation; Sex determination

期刊名称：GENOMICS （ 影响因子：5.736； 五年影响因子：4.939 ）

ISSN： 0888-7543

年卷期： 2021 年 113 卷 4 期

页码：

收录情况： SCI

摘要： The yellowfin seabream Acanthopagrus latus is the economically most important Sparidae fish in the northern South China Sea. As euryhaline fish, they are perfect model for investigating osmoregulatory mechanisms in teleosts. Moreover, the reproductive biology of hermaphrodites has long been intriguing; however, little information is known about the molecular pathways underlying their sex change. Here, we report a chromosome level reference genome of A. latus generated by employing the PacBio single molecule sequencing technique (SMRT) and high-throughput chromosome conformation capture (Hi-C) technologies. The draft genome of yellowfin seabream was 806 Mb, with 732 Mb scaffolds anchored on 24 chromosomes. The contig N50 and scaffold N50 were 2.6 Mb and 30.17 Mb, respectively. The assembly is of high integrity and includes 92.23% universal singlecopy orthologues based on benchmarking universal single-copy orthologs (BUSCO) analysis. A total of 19,631 protein-coding genes were functionally annotated in the reference genome. Moreover, ARRDC3 and GSTA gene families which related to osmoregulation underwent an extensive expansion in two euryhaline sparids fish genomes compared to other teleost genomes. Moreover, integrating sex-specific transcriptome analyses, several genes related to the transforming growth factor beta (TGF-beta) signalling pathway involved in sex differentiation and development. This genomic resource will not only be valuable for studying the osmoregulatory mechanisms in estuarine fish and sex determination in hermaphrodite vertebrate species, but also provide useful genomic tools for facilitating breeding of the yellowfin seabream.

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