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Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria ArchiMer
Grima, Laure; Quillet, E; Boujard, Thierry; Robert Granie, C; Chatain, Beatrice; Mambrini, M.
Little is known about the genetic basis of residual feed intake (RFI) variation in fish, since this trait is highly sensitive to environmental influences, and feed intake of individuals is difficult to measure accurately. The purpose of this work was (i) to assess the genetic variability of RFI estimated by an X-ray technique and (ii) to develop predictive criteria for RFI. Two predictive criteria were tested: loss of body weight during feed deprivation and compensatory growth during re-feeding. Ten heterozygous rainbow trout clones were used. Individual intake and body weight were measured three times at three-week intervals. Then, individual body weight was recorded after two cycles of a three-week feed deprivation followed by a three-week re-feeding....
Tipo: Text Palavras-chave: Selection; Indirect criteria; Residual feed intake; Clone; Rainbow trout.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4777.pdf
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