Abstract

We have sequenced the genome of the largest freshwater fish species of the world, the arapaima. Analysis of gene family dynamics and signatures of positive selection identified genes involved in the specific adaptations and unique features of this iconic species, in particular it’s large size and fast growth. Genome sequences from both sexes combined with RAD-tag analyses from other males and females led to the isolation of male-specific scaffolds and supports an XY sex determination system in arapaima. Whole transcriptome sequencing showed that the product of the gland-like secretory organ on the head surface of males and females may not only provide nutritional fluid for sex-unbiased parental care, but that the organ itself has a more specific function in males, which engage more in parental care.

Details

Title
The genome of the arapaima (Arapaima gigas) provides insights into gigantism, fast growth and chromosomal sex determination system
Author
Du, Kang 1   VIAFID ORCID Logo  ; Wuertz Sven 2 ; Mateus, Adolfi 3 ; Kneitz Susanne 3 ; Stöck Matthias 2   VIAFID ORCID Logo  ; Oliveira, Marcos 4 ; Nóbrega Rafael 5 ; Ormanns Jenny 3 ; Kloas Werner 2 ; Feron Romain 6 ; Klopp Christophe 7   VIAFID ORCID Logo  ; Parrinello Hugues 8 ; Journot Laurent 8 ; He Shunping 9   VIAFID ORCID Logo  ; Postlethwait, John 10   VIAFID ORCID Logo  ; Meyer, Axel 11 ; Guiguen Yann 6 ; Schartl Manfred 12   VIAFID ORCID Logo 

1  University of Wuerzburg, Physiological Chemistry, Biocenter, Wuerzburg, Germany (GRID:grid.8379.5) (ISNI:0000 0001 1958 8658); Institute of Hydrobiology, Chinese Academy of Sciences, Key Laboratory of Aquatic Biodiversity and Conservation of the Chinese Academy of Sciences, Wuhan, China (GRID:grid.429211.d) (ISNI:0000 0004 1792 6029); University of Chinese Academy of Sciences, Beijing, China (GRID:grid.410726.6) (ISNI:0000 0004 1797 8419) 
2  Leibniz-Institute of Freshwater Ecology and Inland Fisheries, IGB, Berlin, Germany (GRID:grid.419247.d) (ISNI:0000 0001 2108 8097) 
3  University of Wuerzburg, Physiological Chemistry, Biocenter, Wuerzburg, Germany (GRID:grid.8379.5) (ISNI:0000 0001 1958 8658) 
4  University of Wuerzburg, Physiological Chemistry, Biocenter, Wuerzburg, Germany (GRID:grid.8379.5) (ISNI:0000 0001 1958 8658); Institute of Biosciences, UNESP, Reproductive and Molecular Biology Group, Departament of Morphology, Botucatu, Brazil (GRID:grid.410543.7) (ISNI:0000 0001 2188 478X) 
5  Institute of Biosciences, UNESP, Reproductive and Molecular Biology Group, Departament of Morphology, Botucatu, Brazil (GRID:grid.410543.7) (ISNI:0000 0001 2188 478X) 
6  INRA, UR1037 LPGP, Fish Physiology and Genomics, Rennes, France (GRID:grid.460202.2) 
7  MIAT INRA Toulouse, CS 52627, Castanet-Tolosan, France (GRID:grid.460202.2) 
8  Montpellier GenomiX (MGX), c/o Institut de Génomique Fonctionnelle, 141 rue de la cardonille, Montpellier Cedex 05, France (GRID:grid.460202.2) 
9  Institute of Hydrobiology, Chinese Academy of Sciences, Key Laboratory of Aquatic Biodiversity and Conservation of the Chinese Academy of Sciences, Wuhan, China (GRID:grid.429211.d) (ISNI:0000 0004 1792 6029) 
10  University of Oregon, Eugene, Institute of Neuroscience, Oregon, USA (GRID:grid.170202.6) (ISNI:0000 0004 1936 8008) 
11  University of Konstanz, Universitätstraße 10, Lehrstuhl für Zoologie und Evolutionsbiologie, Department of Biology, Konstanz, Germany (GRID:grid.9811.1) (ISNI:0000 0001 0658 7699) 
12  University of Wuerzburg, Physiological Chemistry, Biocenter, Wuerzburg, Germany (GRID:grid.8379.5) (ISNI:0000 0001 1958 8658); University Hospital, Comprehensive Cancer Center Mainfranken, Würzburg, Germany (GRID:grid.8379.5); Texas A&M University, Hagler Institute for Advanced Study and Department of Biology, College Station, USA (GRID:grid.264756.4) (ISNI:0000 0004 4687 2082) 
Publication year
2019
Publication date
Dec 2019
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-019-41457-x
ProQuest document ID
2199198801
Copyright
This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.