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Sex Determination and Differentiation of the Siberian Sturgeon

  • Denise Vizziano-Cantonnet
  • Santiago Di Landro
  • André Lasalle
Chapter

Abstract

This is a synthesis of the published information on sex determination and differentiation in sturgeons with special emphasis in Siberian sturgeon Acipenser baerii. The sex-determination system has been poorly studied in sturgeons and paddlefishes. Among 27 species of Acipenseriformes, the WZ-female model has been proposed in five species and one hybrid based on gynogenetic studies. The sex-determining gene remains unknown, and there are no studies on the influence from autosomal genetic factors or environmental cues. The lack of genetic sex marker is limiting the studies on sex determination and differentiation, as well as the application in the early sexing for culture purposes.

The gonad sex differentiation show similar histological features in different sturgeons studied and occur at juvenile stage (4–9 months of age). Siberian sturgeon reach the sex differentiation around the 8 months of age when reared in a range of temperature of 14–19 °C, coincident with the upper range of spawning temperature of species at wild. However, the potential effect of temperature on sex determination has not been studied in sturgeons. The molecular sex differentiation period precedes the sex differentiation and occurs between 3 and 6 months old in Siberian sturgeons. The factors involved in male and female pathways are currently studied at molecular level. Gonad transcriptomes are emerging in sturgeons stimulating the knowledge of factors that must direct a cascade of gene regulatory controls that provide sex-specific phenotypes. There is a lack of functional studies in sturgeons.

Keywords

Sturgeons Sex determination Sex differentiation Gonad histology Gene expression Acipenser baerii 

Notes

Acknowledgments

Many thanks are due to the enterprise Estuario del Plata (Uruguay) for their cooperation with Universidad de la República (UdelaR). Dr. Vet. Andrés Ryncowski gave us the temperature records. We are grateful with Dr. François Brion (INERIS, Paris, France) for the donation of the anti-cyp17 elevated against zebra fish protein.

Glossary

amh

Anti-Müllerian hormone

amh-Y

Y-linked amh

ar

Androgen receptor

cyp17a1

Cytochrome P450, family 17, subfamily a, polypeptide 1

cyp19a1

Cytochrome P450, family 19, subfamily a, polypeptide 1a

dmrt1

Doublesex and Mab-3-related transcription factor 1

dm-W

W-linked dmrt1 paralog

dmY

Y-specific DM-domain gene required for male development

ESD

Environmental sex determination

figα

Factor in germ line alpha

foxl2a

Forkhead box L2 a

fst

Follistatin

GSD

Genetic sex determination

gsdf-Y

Gonadal soma-derived growth factor on the Y

gsdf2

Gonadal soma-derived growth factor

GSI

Gonadosomatic index

hsd17b1

Hydroxysteroid (17-beta) dehydrogenase 1

nrOb1

Nuclear receptor subfamily 0, group b, member 1

SDG

Sex-determining gene

sdY

Sexually dimorphic on the chromosome Y

sox9

Sex-determining region Y-box containing gene 9

sox9a1

Sex-determining region Y-box containing gene 9

sox9a2

Sex-determining region Y-box containing gene 9

star

Steroidogenic acute regulatory protein

tbx1

T-box transcription factor gene family

17,20P

17,20ß-dihydroxyprogesterone

17P

17-hydroxyprogesterone

20βHSD

20-hydroxysteroid dehydrogenase

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Denise Vizziano-Cantonnet
    • 1
  • Santiago Di Landro
    • 1
  • André Lasalle
    • 1
  1. 1.Facultad de Ciencias, Laboratorio de Fisiología de la Reproducción y Ecología de PecesMontevideoUruguay

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