Adaptive evolution of low-salinity tolerance and hypoosmotic regulation in a euryhaline teleost, Takifugu obscurus
文献类型： 外文期刊
作者： Zhang, Hanyuan 1 ; Hou, Jilun 3 ; Liu, Haijin 4 ; Zhu, Haoyong 5 ; Xu, Gangchun 6 ; Xu, Jian 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Key Lab Aquat Genom, Minist Agr, Beijing, Peoples R China
2.Chinese Acad Fishery Sci, Beijing Key Lab Fishery Biotechnol, Beijing, Peoples R China
3.Chinese Acad Fishery Sci, Beidaihe Cent Expt Stn, Qinhuangdao, Hebei, Peoples R China
4.Dalian Tianzheng Ind Co Ltd, Breeding Lab, Dalian, Liaoning, Peoples R China
5.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi, Jiangsu, Peoples R China
6.Chinese Acad Fishery, Freshwater Fisheries Res Ctr, Wuxi, Jiangsu, Peoples R China
期刊名称：MARINE BIOLOGY （ 影响因子：2.573； 五年影响因子：2.778 ）
ISSN： 0025-3162
年卷期： 2020 年 167 卷 7 期
页码：
收录情况： SCI
摘要： The mechanism of osmoregulation is crucial for maintaining growth, development, and life activities in teleosts. Takifugu obscurus, the only euryhaline species in the genus Takifugu, is a proper model organism for studying the mechanism of low-salt tolerance and hypoosmotic regulation. In this study, whole-genome sequencing data were obtained from 90 pufferfish representing five species within this genus, T. rubripes, T. obscurus, T. flavidus, T. niphobles, and T. bimaculatus. Using a phylogeny, PCA, and population structure analyses, we observed similar amounts of population genetic differentiation among species. The five species are closely related to each other and have differentiated within a relatively short period, while T. bimaculatus and T. flavidus shared the most similar genetic backgrounds. We further identified hundreds of genes under selection related to hypoosmotic regulation between T. obscurus and other Takifugu species, including 16 representative genes involving ion transporters (atp1a3, atp2a2, atp2a3, slc13a1, slc5a8, slc12a2, slc12a4, slc26a2, scn1b, and kcna2/3/10), genes involved in hormone regulation (fyn, prlr, and grb2), and a gene associated with water absorption (aqp3). Our findings provide preliminary insight into the mechanism of osmoregulation and will facilitate follow-up validation of candidate genes related to osmoregulation in T. obscurus.
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