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Article Dans Une Revue Genetics Selection Evolution Année : 2004

Enhanced individual selection for selecting fast growing fish: the "PROSPER" method, with application on brown trout (Salmo trutta fario)

Bernard Chevassus
  • Fonction : Auteur
Edwige Quillet
Francine Krieg
  • Fonction : Auteur
  • PersonId : 1205380
Marie-Gwénola Hollebecq
  • Fonction : Auteur
Muriel Mambrini
André Fauré
  • Fonction : Auteur
Laurent Labbé
Jean-Pierre Hiseux
  • Fonction : Auteur
Marc Vandeputte

Résumé

Growth rate is the main breeding goal of fish breeders, but individual selection has often shown poor responses in fish species. The PROSPER method was developed to overcome possible factors that may contribute to this low success, using ([see full textsee full text]) a variable base population and high number of breeders ($Ne >100$), ([see full textsee full text]) selection within groups with low non-genetic effects and (3) repeated growth challenges. Using calculations, we show that individual selection within groups, with appropriate management of maternal effects, can be superior to mass selection as soon as the maternal effect ratio exceeds 0.15, when heritability is 0.25. Practically, brown trout were selected on length at the age of one year with the PROSPER method. The genetic gain was evaluated against an unselected control line. After four generations, the mean response per generation in length at one year was 6.2% of the control mean, while the mean correlated response in weight was 21.5% of the control mean per generation. At the 4th generation, selected fish also appeared to be leaner than control fish when compared at the same size, and the response on weight was maximal ($\approx$130% of the control mean) between 386 and 470 days post fertilisation. This high response is promising, however, the key points of the method have to be investigated in more detail.
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hal-00894320 , version 1 (11-05-2020)

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Bernard Chevassus, Edwige Quillet, Francine Krieg, Marie-Gwénola Hollebecq, Muriel Mambrini, et al.. Enhanced individual selection for selecting fast growing fish: the "PROSPER" method, with application on brown trout (Salmo trutta fario). Genetics Selection Evolution, 2004, 36 (6), pp.643-661. ⟨10.1051/gse:2004022⟩. ⟨hal-00894320⟩
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