A chromosome-level genome of Portunus trituberculatus provides insights into its evolution, salinity adaptation and sex determination

文献类型： 外文期刊

第一作者： Lv, Jianjian

作者： Lv, Jianjian;Gao, Baoquan;Ti, Xingbin;Yan, Deping;Liu, Ping;Li, Jian;Li, Ronghua;Wang, Chunlin;Lv, Jianjian;Gao, Baoquan;Liu, Ping;Li, Jian;Su, Zhencheng;Liu, Guangjian

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关键词： evolution; genome assembly; Portunus trituberculatus; salinity adaptation; sex determination

期刊名称：MOLECULAR ECOLOGY RESOURCES （ 影响因子：8.678； 五年影响因子：8.984 ）

ISSN： 1755-098X

年卷期： 2022 年 22 卷 4 期

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收录情况： SCI

摘要： Portunus tritubercuiatus (Crustacea: Decapoda: Brachyura), commonly known as the swimming crab, is of major ecological importance, as well as being important to the fisheries industry. P. trituberculatus is also an important farmed species in China due to its rapid growth rate and high economic value. Here, we report the genome sequence of the swimming crab, which was assembled at the chromosome scale, covering similar to 1.2 Gb, with 79.99% of the scaffold sequences assembled into 53 chromosomes. The contig and scaffold N50 values were 108.7 kb and 15.6 Mb, respectively, with 19,981 protein-coding genes. Based on comparative genomic analyses of crabs and shrimps, the C2H2 zinc finger protein family was found to be the only gene family expanded in crab genomes, suggesting it was closely related to the evolution of crabs. The combination of transcriptome and bulked segregant analysis provided insights into the genetic basis of salinity adaptation and rapid growth in P. tritubercuiatus. In addition, the specific region of the Y chromosome was located for the first time in the genome of P. trituberculatus, and three genes were preliminarily identified as candidate genes for sex determination in this region. Decoding the swimming crab genome not only provides a valuable genomic resource for further biological and evolutionary studies, but is also useful for molecular breeding of swimming crabs.

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