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| Haffray, Pierrick; Enez, Florian; Bugeon, Jerome; Chapuis, Herve; Dupont-nivet, Mathilde; Chatain, Beatrice; Vandeputte, Marc. |
| Marker-based parentage assignment provides the opportunity to investigate factors of efficiency for mixed-family designs and factorial mating. In such designs, family size is both uncontrolled and small, which may be thought to limit the accuracy of estimated breeding values (EBVs). The objective of this work was to estimate the accuracy of EBVs of growth and quality traits in a large factorial mating design and in commercial breeding conditions. An expected six hundred full-sib families of rainbow trout Oncorhynchus mykiss (2042 fish in total) were produced by ten factorial matings of six dams with ten sires. Fish were phenotyped for body weight, carcass yield, fillet yield, fillet fat content and fillet colour, and family information was recovered using... |
| Tipo: Text |
Palavras-chave: Aquaculture; Salmonids; DNA parentage assignment; Sib selection; EBV accuracy. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00429/54062/55395.pdf |
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| 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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