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Production of all-triploid and all-female brown trout for aquaculture

Published online by Cambridge University Press:  15 January 1991

Edwige Quillet ,
Laure Foisil ,
Bernard Chevassus ,
Daniel Chourrout  and
F. G. Liu
Edwige Quillet
Affiliation:
INRA, Laboratoire de Génétique des Poissons, 78350 Jouy-en-Josas, France
Laure Foisil
Affiliation:
INRA, Laboratoire de Génétique des Poissons, 78350 Jouy-en-Josas, France
Bernard Chevassus
Affiliation:
INRA, Laboratoire de Génétique des Poissons, 78350 Jouy-en-Josas, France
Daniel Chourrout
Affiliation:
INRA, Laboratoire de Génétique des Poissons, 78350 Jouy-en-Josas, France
F. G. Liu
Affiliation:
INRA, Laboratoire de Génétique des Poissons, 78350 Jouy-en-Josas, France Present address: Aquaculture department, Taiwan Fisheries Research Institute, Keelung, Taiwan, R.O.C.
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Abstract

Heat shocks effective for the production of triploid brown trout (Salmo trutta) were optimized: 28 °C shocks lasting 10 to 15 minutes and applied 5 minutes after fertilization induce very high rates of triploidy (close to 100%) without causing much mortality; they can therefore be proposed for mass production of triploid brown trout. Female homogamety in that species is also demonstrated from analysis of gynogenetic progenies and progenies of sex-inverted females. Although the efficiency of masculinizing hormonal treatments requires further improvement, production of all-female sterile populations is now possible in this species promising for European sea-farming.

Keywords

Brown trouttriploidygynogenesisgenetic sex-controlmasculinizationTruite communetriploïdiegynogenèsedéterminisme génétique du sexeinversion sexuelle
Type
Research Article
Information
Aquatic Living Resources , Volume 4 , Issue 1 , January 1991 , pp. 27 - 32
Copyright
© IFREMER-Gauthier-Villars, 1991

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