TAILIEUCHUNG - Báo cáo sinh học: " Enhanced individual selection for selecting fast growing fish: the “PROSPER” method, with application on brown trout (Salmo trutta fario)"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Enhanced individual selection for selecting fast growing fish: the “PROSPER” method, with application on brown trout (Salmo trutta fario) | Genet. Sel. Evol. 36 2004 643-661 INRA EDP Sciences 2004 DOI gse 2004022 643 Original article Enhanced individual selection for selecting fast growing fish the prosper method with application on brown trout Salmo truttafario Bernard CHEVASSUSa Edwige QuiLLETa Francine KRIEGa Marie-Gwénola HoLLEBECQa Muriel MAMBRlNla André FAUREb Laurent LABBEb Jean-Pierre HlSEUXa Marc VANDEPUTTEa a Laboratoire de génétique des poissons Institut national de la recherche agronomique 78352 Jouy-en-Josas Cedex France b Station expérimentale mixte Ifremer-Inra BP 17 29450 Sizun France Received 10 October 2003 accepted 30 June 2004 Abstract - 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 1 a variable base population and high number of breeders Ne 100 2 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 when heritability is . 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 of the control mean while the mean correlated response in weight was 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 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. Salmo trutta selective breeding aquaculture genetics .

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