Massive Loss of Olfactory Receptors But Not Trace Amine-Associated Receptors in the World's Deepest-Living Fish (Pseudoliparis swirei)
Jiang, Haifeng1,2,3; Du, Kang1; Gan, Xiaoni1,4; Yang, Liandong1; He, Shunping4,5
2019-11-01
Source PublicationGENES
Volume10Issue:11Pages:17
Abstract

Olfactory receptor repertoires show highly dynamic evolution associated with ecological adaptations in different species. The Mariana snailfish (Pseudoliparis swirei) living below a depth of 6000 m in the Mariana Trench evolved degraded vision and occupies a specific feeding habitat in a dark, low-food environment. However, whether such adaptations involve adaptive changes in the chemosensory receptor repertoire is not known. Here, we conducted a comparative analysis of the olfactory receptor (OR) and trace amine-associated receptor (TAAR) gene repertoires in nine teleosts with a focus on the evolutionary divergence between the Mariana snailfish and its shallow-sea relative, Tanaka's snailfish (Liparis tanakae). We found many fewer functional OR genes and a significantly higher fraction of pseudogenes in the Mariana snailfish, but the numbers of functional TAAR genes in the two species were comparable. Phylogenetic analysis showed that the expansion patterns of the gene families were shared by the two species, but that Mariana snailfish underwent massive gene losses in its OR repertoire. Despite an overall decreased size in OR subfamilies and a reduced number of TAAR subfamilies in the Mariana snailfish, expansion of certain subfamilies was observed. Selective pressure analysis indicated greatly relaxed selective strength in ORs but a slightly enhanced selective strength in TAARs of Mariana snailfish. Overall, our study reveals simplified but specific OR and TAAR repertoires in the Mariana snailfish shaped by natural selection with respect to ecological adaptations in the hadal environment. This is the first study on the chemosensation evolution in vertebrates living in the hadal zone, which could provide new insights into evolutionary adaptation to the hadal environment.

KeywordMariana snailfish (Pseudoliparis swirei) olfactory receptor hadal trench adaptation
DOI10.3390/genes10110910
Indexed BySCI
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
Language英语
Funding ProjectNational Key R&D Program of China[2018YFC0309800] ; National Natural Science Foundation of China[91731301] ; National Natural Science Foundation of China[31972866] ; National Natural Science Foundation of China[31601858]
WOS KeywordEVOLUTIONARY DYNAMICS ; PHYLOGENETIC ANALYSIS ; GENOMIC ORGANIZATION ; GENE REPERTOIRES ; ODORANT ; SELECTION ; PERFORMANCE ; VERTEBRATES ; ABYSSAL ; FAMILY
WOS Research AreaGenetics & Heredity
WOS SubjectGenetics & Heredity
WOS IDWOS:000502296000076
PublisherMDPI
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.idsse.ac.cn/handle/183446/7363
Collection深海科学研究部_深海生物学研究室_深海鱼类物种与基因组多样性的研究
Corresponding AuthorYang, Liandong; He, Shunping
Affiliation1.Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Harbin 150070, Heilongjiang, Peoples R China
4.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
5.Chinese Acad Sci, Ctr Excellence Anim Evolut & Genet, Kunming Inst Zool, Kunming 650223, Yunnan, Peoples R China
Corresponding Author AffilicationInstitute of Deep-sea Science and Engineering,CAS
Recommended Citation
GB/T 7714
Jiang, Haifeng,Du, Kang,Gan, Xiaoni,et al. Massive Loss of Olfactory Receptors But Not Trace Amine-Associated Receptors in the World's Deepest-Living Fish (Pseudoliparis swirei)[J]. GENES,2019,10(11):17.
APA Jiang, Haifeng,Du, Kang,Gan, Xiaoni,Yang, Liandong,&He, Shunping.(2019).Massive Loss of Olfactory Receptors But Not Trace Amine-Associated Receptors in the World's Deepest-Living Fish (Pseudoliparis swirei).GENES,10(11),17.
MLA Jiang, Haifeng,et al."Massive Loss of Olfactory Receptors But Not Trace Amine-Associated Receptors in the World's Deepest-Living Fish (Pseudoliparis swirei)".GENES 10.11(2019):17.
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