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BMC Genomics. 2018 Nov 21;19(1):832. doi: 10.1186/s12864-018-5163-2.

The genome of the water strider Gerris buenoi reveals expansions of gene repertoires associated with adaptations to life on the water.

Author information

1
Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, Ecole Normale Supérieure de Lyon 46, allée d'Italie, 69364, Lyon Cedex 07, France. davidarmisen@gmail.com.
2
Department of Molecular Genetics & Microbiology and UF Genetics Institute, University of Florida, 2033 Mowry Road, Gainesville, FL, 32610-3610, USA.
3
Department of Biological Sciences, Wayne State University, Detroit, MI, 48202, USA.
4
Department of Biological Sciences, McMicken College of Arts and Sciences, University of Cincinnati, 318 College Drive, Cincinnati, OH, 45221-0006, USA.
5
Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
6
Institute for Zoology: Developmental Biology, University of Cologne, Zülpicher Str. 47b, 50674, Cologne, Germany.
7
School of Life Sciences, University of Warwick, Gibbet Hill Campus, Coventry, CV4 7AL, UK.
8
USDA-ARS Horticultural Crops Research Unit, 3420 NW Orchard Avenue, Corvallis, OR, 97330, USA.
9
Department of Crop and Soil Science, Oregon State University, 3050 SW Campus Way, Corvallis, OR, 97331, USA.
10
USDA Agricultural Research Service, National Agricultural Library, Beltsville, MD, 20705, USA.
11
Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA.
12
Howard Hughes Medical Institute, University of Washington, Seattle, WA, 98195, USA.
13
Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
14
Department of Biology, McGill University, 1205 Avenue Docteur Penfield Avenue, Montréal, Québec, H3A 1B1, Canada.
15
Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, Ecole Normale Supérieure de Lyon 46, allée d'Italie, 69364, Lyon Cedex 07, France.
16
Laboratory for Evolution and Development, Department of Biochemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand.
17
School of Biology, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.
18
A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, 119991, Russia.
19
Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, Netherlands.
20
Max Planck Institute for Chemical Ecology, Hans-Knöll Strasse 8, 07745, Jena, Germany.
21
Department of Entomology, University of Maryland, College Park, MD, 20742, USA.
22
Smithsonian Tropical Research Institute, Apartado Postal 0843-03092, Balboa Ancon, Panama City, Panama.
23
Center of Life Sciences, Skolkovo Institute of Science and Technology, Skolkovo, 143025, Russia.
24
USDA ARS Center for Grain and Animal Health Research, 1515 College Ave., Manhattan, KS-66502, USA.
25
Department of Evolutionary Genetics, Max-Planck-Institut für Evolutionsbiologie, August-Thienemann-Straße 2, 24306, Plön, Germany.
26
Human Genome Sequencing Center, Department of Human and Molecular Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA. stephenr@bcm.edu.
27
Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5242, Ecole Normale Supérieure de Lyon 46, allée d'Italie, 69364, Lyon Cedex 07, France. abderrahman.khila@ens-lyon.fr.

Abstract

BACKGROUND:

Having conquered water surfaces worldwide, the semi-aquatic bugs occupy ponds, streams, lakes, mangroves, and even open oceans. The diversity of this group has inspired a range of scientific studies from ecology and evolution to developmental genetics and hydrodynamics of fluid locomotion. However, the lack of a representative water strider genome hinders our ability to more thoroughly investigate the molecular mechanisms underlying the processes of adaptation and diversification within this group.

RESULTS:

Here we report the sequencing and manual annotation of the Gerris buenoi (G. buenoi) genome; the first water strider genome to be sequenced thus far. The size of the G. buenoi genome is approximately 1,000 Mb, and this sequencing effort has recovered 20,949 predicted protein-coding genes. Manual annotation uncovered a number of local (tandem and proximal) gene duplications and expansions of gene families known for their importance in a variety of processes associated with morphological and physiological adaptations to a water surface lifestyle. These expansions may affect key processes associated with growth, vision, desiccation resistance, detoxification, olfaction and epigenetic regulation. Strikingly, the G. buenoi genome contains three insulin receptors, suggesting key changes in the rewiring and function of the insulin pathway. Other genomic changes affecting with opsin genes may be associated with wavelength sensitivity shifts in opsins, which is likely to be key in facilitating specific adaptations in vision for diverse water habitats.

CONCLUSIONS:

Our findings suggest that local gene duplications might have played an important role during the evolution of water striders. Along with these findings, the sequencing of the G. buenoi genome now provides us the opportunity to pursue exciting research opportunities to further understand the genomic underpinnings of traits associated with the extreme body plan and life history of water striders.

KEYWORDS:

Adaptation; Evolution; Genome sequence; Water striders; Water surface locomotion

PMID:
30463532
PMCID:
PMC6249893
DOI:
10.1186/s12864-018-5163-2
[Indexed for MEDLINE]
Free PMC Article

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