OpenAccessBelV2, France, Analysis, bibRecord, 000132

Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria (Open Access publication)

Identifieur interne : 000132 ( France/Analysis ); précédent : 000131; suivant : 000133

Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria (Open Access publication)

Auteurs : Laure Grima [France] ; Edwige Quillet [France] ; Thierry Boujard [France] ; Christèle Robert-Granié [France] ; Béatrice Chatain [France] ; Muriel Mambrini [France]

Source :

Genetics, Selection, Evolution : GSE [ 0999-193X ] ; 2008.

RBID : PMC:2674895

Abstract

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 threeweek intervals. Then, individual body weight was recorded after two cycles of a three-week feed deprivation followed by a three-week re-feeding. The ratio of the genetic variance to the phenotypic variance was found high to moderate for growth, feed intake, and RFI (VG/VP = 0.63 ± 0.11, 0.29 ± 0.11, 0.29 ± 0.09, respectively). The index that integrates performances achieved during deprivation and re-feeding periods explained 59% of RFI variations. These results provide a basis for further studies on the origin of RFI differences and show that indirect criteria are good candidates for future selective breeding programs.

Url:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2674895

DOI: 10.1186/1297-9686-40-6-607
PubMed: 18990354
PubMed Central: 2674895

Affiliations:

Links to Exploration step

PMC:2674895

Le document en format XML

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<front><div type="abstract" xml:lang="en"><p>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 threeweek intervals. Then, individual body weight was recorded after two cycles of a three-week feed deprivation followed by a three-week re-feeding. The ratio of the genetic variance to the phenotypic variance was found high to moderate for growth, feed intake, and RFI (<italic>VG</italic>
/<italic>VP </italic>
= 0.63 ± 0.11, 0.29 ± 0.11, 0.29 ± 0.09, respectively). The index that integrates performances achieved during deprivation and re-feeding periods explained 59% of RFI variations. These results provide a basis for further studies on the origin of RFI differences and show that indirect criteria are good candidates for future selective breeding programs.</p>
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<name sortKey="Boujard, Thierry" sort="Boujard, Thierry" uniqKey="Boujard T" first="Thierry" last="Boujard">Thierry Boujard</name>
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<name sortKey="Mambrini, Muriel" sort="Mambrini, Muriel" uniqKey="Mambrini M" first="Muriel" last="Mambrini">Muriel Mambrini</name>
<name sortKey="Quillet, Edwige" sort="Quillet, Edwige" uniqKey="Quillet E" first="Edwige" last="Quillet">Edwige Quillet</name>
<name sortKey="Robert Granie, Christele" sort="Robert Granie, Christele" uniqKey="Robert Granie C" first="Christèle" last="Robert-Granié">Christèle Robert-Granié</name>
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Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria (Open Access publication)

Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria (Open Access publication)

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