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From theory to practice: Empirical evaluation of the assignment power of marker sets for pedigree analysis in fish breeding 5
Vandeputte, Marc; Rossignol, Marie-noelle; Pincent, Cedric.
The use of marker-based pedigrees is increasing in aquaculture breeding, and obtaining high assignment rates is necessary for practical use of this methodology. In this paper, we used 12 real parentage assignment datasets from three species (European sea bass Dicentrarchus labrax, common carp Cyprinus carpio and rainbow trout Oncorhynchus mykiss) to investigate the relationships between theoretical, simulated and real assignment power. We found out that there was a large decrease between the theoretical and the observed values, which we modeled in four independent steps: 1) from theoretical values to population-wise simulations (-2.8% on average), 2) from population-wise simulations to true parent set specific simulations (-2.6% on average), 3) from true...
Tipo: Text Palavras-chave: Aquaculture; Parentage assignment; Exclusion probability; Microsatellites.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00035/14586/11964.pdf
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Negative genetic correlations between production traits and head or bony tissues in large all-female rainbow trout (Oncorhynchus mykiss) 5
Haffray, Pierrick; Bugeon, Jerome; Pincent, Cedric; Chapuis, Herve; Mazeiraud, Emmanuel; Rossignol, Marie-noelle; Chatain, Beatrice; Vandeputte, Marc; Dupont-nivet, Mathilde.
Genetic parameters of production traits (growth, carcass yield, fillet yield) and bony tissues (head and vertebral axis) were estimated for large all-female rainbow trout Oncorhynchus mykiss reared in freshwater. Genetic parameters were estimated using REML at 16 months of age (1636 g) on 1962 DNA-assigned progenies from a partial factorial mating design with 60 dams and 100 sex-reversed sires. Most traits presented medium to high heritability (0.37 to 0.54). A high genetic correlation (r(A)=0.97) was found between fillet yield and headless gutted carcass yield (or HGCarc%). Due to its higher heritability and high genetic correlation with fillet yield, selection on HGCarc% should result in a 50% increase in selection efficiency on fillet yield by reducing...
Tipo: Text Palavras-chave: Resource allocation; Fillet yield; Head; Salmonids; Aquaculture; Selective breeding.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00109/22042/19801.pdf
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