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Identification of candidate sex-specific genomic regions in male and female Asian arowana genomes

文献类型： 外文期刊

作者： Mu, Xidong 1 ; Liu, Yi 1 ; Liu, Chao 1 ; Zhao, Chenxi 2 ; Li, Ruihan 2 ; You, Xinxin 2 ; Yang, Yexin 1 ; Wang, Xuejie 1 ; Hu, Yinchang 1 ; Shi, Qiong 2 ; Bian, Chao 2 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab Prevent & Control Aquat Invas Alien Speci, Minist Agr & Rural Affairs, Guangdong Modern Recreat Fisheries Engn Technol C, Guangzhou 510380, Peoples R China

2.BGI, BGI Marine, BGI Acad Marine Sci, Guangdong Prov Key Lab Mol Breeding Marine Econ A, Shenzhen 518083, Peoples R China

3.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China

4.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Guangdong Prov Key Lab Aquat Anim Immunol & Susta, Guangzhou 510380, Peoples R China

关键词： Asian arowana; male and female; genome sequencing and resequencing; sex-related genes

期刊名称：GIGASCIENCE （ 影响因子：9.2； 五年影响因子：9.3 ）

ISSN： 2047-217X

年卷期： 2022 年 11 卷

页码：

收录情况： SCI

摘要： Background: Asian arowana, Scleropages formosus, is one of the most expensive aquarium fish species worldwide. Its sex, however, cannot be distinguished clearly at any development stage, which impedes captive breeding and species protection for this endangered aquarium fish. Results: To discover molecular clues to the sex of Asian arowana, we sequenced 26.5 Gb of PacBio HiFi reads and 179.2 Gb of Hi-C reads for 1 male fish and also sequenced 106.5 Gb of Illumina reads, 36.0 Gb of PacBio Sequel reads, and 80.7 Gb of Hi-C reads for 1 female individual. The final male and female genome assemblies were approximately 756.8 Mb and 781.5 Mb in length and contained 25,262 and 25,328 protein-coding genes, respectively. We also resequenced the genomes of 15 male and 15 female individuals with approximately 722.1 Gb of Illumina reads. A genome-wide association study identified several potentially divergent regions between male and female individuals. In these regions, cd48 and cfap52 could be candidate genes for sex determination of Asian arowana. We also found some structural variations in few chromosomes between male and female individuals. Conclusion: We provided an improved reference genome assembly of female arowana and generated the first sequenced genome of 1 male individual. These valuable genetic resources and resequencing data may improve global aquarium fish research.

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