Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs

Intramuscular fat (IMF) content is a relevant trait for the pig industry and consumers. However, selection for IMF has the undesired correlated effect of decreasing lean growth. A selection experiment was performed to investigate the effects of selection against backfat thickness (BT) at restrained...

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Autores: Ros Freixedes, Roger, Reixach, Josep, Bosch, Lluís, Tor i Naudí, Marc, Estany Illa, Joan
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/67942
Acceso en línea:https://doi.org/10.2527/jas.2013-6282
http://hdl.handle.net/10459.1/67942
Access Level:acceso abierto
Palabra clave:Backfat thickness
Growth
Intramuscular fat
Lean
Pork
Selection
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spelling Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigsRos Freixedes, RogerReixach, JosepBosch, LluísTor i Naudí, MarcEstany Illa, JoanBackfat thicknessGrowthIntramuscular fatLeanPorkSelectionIntramuscular fat (IMF) content is a relevant trait for the pig industry and consumers. However, selection for IMF has the undesired correlated effect of decreasing lean growth. A selection experiment was performed to investigate the effects of selection against backfat thickness (BT) at restrained IMF. Barrows from a purebred Duroc line were allocated into a selected (n = 165) or a control (n = 185) group based on their litter predicted EBV. Litters in the selected group were selected against BT at 180 d at restrained IMF in gluteus medius (GM) whereas those in the control group were chosen randomly. Realized selection intensities and genetic responses for BT, IMF in GM, and BW were estimated using a 3-trait multivariate animal mixed model under a Bayesian setting. Correlated responses for other traits were estimated similarly but using a 4-trait model, where other traits were added to the previous 3-trait model 1 at a time. Selected pigs had less BT than control pigs [-1.22 mm, with highest posterior density interval at 95% (HPD95; -2.47, -0.75)] with restrained decrease in IMF, both in GM [-0.16%; HPD95 (-0.36, +0.05)] and in LM [-0.15%; HPD95 (-0.37, +0.09)]. However, the realized selection intensity for IMF in GM denotes that the restriction on IMF was incomplete [-0.18; HPD95 (-0.36, +0.02)]. Selection decreased BW [-1.64 kg; HPD95 (-2.47, -0.75)] but increased carcass lean weight [+0.66 kg; HPD95 (+0.14, +1.22)], indicating that the response in BT offsets the unfavorable correlated response in BW. Selected pigs were shorter [-0.50 cm; HPD95 (-0.81, -0.20)] but with similar ham weight and loin depth. These results provide evidence that lean weight can be improved restraining the genetic change in IMF. However, they also stress that a complete restriction on IMF is difficult to achieve unless selection is practiced on a big population where IMF is accurately predicted.We acknowledge Teresa Giró for assistance with sampling and laboratory analyses and the staff of Selección Batallé for their cooperation. This research was funded by the Spanish Ministry of Science and Innovation (MICINN; grants AGL2006-01243 and AGL2009-09779). R. Ros-Freixedes is recipient of a PhD scholarship from MICINN (BES-2010-034607).American Society of Animal Science2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://doi.org/10.2527/jas.2013-6282http://hdl.handle.net/10459.1/67942reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/MEC//AGL2006-01243info:eu-repo/grantAgreement/MICINN//AGL2009-09779info:eu-repo/grantAgreement/MICINN//BES-2010-034607Versió postprint del document publicat a: https://doi.org/10.2527/jas.2013-6282Journal of Animal Science, 2013, vol. 91, num. 8, p. 3514-3521(c) American Society of Animal Science, 2013info:eu-repo/semantics/openAccessoai:repositori.udl.cat:10459.1/679422026-06-24T12:42:17Z
dc.title.none.fl_str_mv Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
title Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
spellingShingle Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
Ros Freixedes, Roger
Backfat thickness
Growth
Intramuscular fat
Lean
Pork
Selection
title_short Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
title_full Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
title_fullStr Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
title_full_unstemmed Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
title_sort Response to selection for decreased backfat thickness at restrained intramuscular fat content in Duroc pigs
dc.creator.none.fl_str_mv Ros Freixedes, Roger
Reixach, Josep
Bosch, Lluís
Tor i Naudí, Marc
Estany Illa, Joan
author Ros Freixedes, Roger
author_facet Ros Freixedes, Roger
Reixach, Josep
Bosch, Lluís
Tor i Naudí, Marc
Estany Illa, Joan
author_role author
author2 Reixach, Josep
Bosch, Lluís
Tor i Naudí, Marc
Estany Illa, Joan
author2_role author
author
author
author
dc.subject.none.fl_str_mv Backfat thickness
Growth
Intramuscular fat
Lean
Pork
Selection
topic Backfat thickness
Growth
Intramuscular fat
Lean
Pork
Selection
description Intramuscular fat (IMF) content is a relevant trait for the pig industry and consumers. However, selection for IMF has the undesired correlated effect of decreasing lean growth. A selection experiment was performed to investigate the effects of selection against backfat thickness (BT) at restrained IMF. Barrows from a purebred Duroc line were allocated into a selected (n = 165) or a control (n = 185) group based on their litter predicted EBV. Litters in the selected group were selected against BT at 180 d at restrained IMF in gluteus medius (GM) whereas those in the control group were chosen randomly. Realized selection intensities and genetic responses for BT, IMF in GM, and BW were estimated using a 3-trait multivariate animal mixed model under a Bayesian setting. Correlated responses for other traits were estimated similarly but using a 4-trait model, where other traits were added to the previous 3-trait model 1 at a time. Selected pigs had less BT than control pigs [-1.22 mm, with highest posterior density interval at 95% (HPD95; -2.47, -0.75)] with restrained decrease in IMF, both in GM [-0.16%; HPD95 (-0.36, +0.05)] and in LM [-0.15%; HPD95 (-0.37, +0.09)]. However, the realized selection intensity for IMF in GM denotes that the restriction on IMF was incomplete [-0.18; HPD95 (-0.36, +0.02)]. Selection decreased BW [-1.64 kg; HPD95 (-2.47, -0.75)] but increased carcass lean weight [+0.66 kg; HPD95 (+0.14, +1.22)], indicating that the response in BT offsets the unfavorable correlated response in BW. Selected pigs were shorter [-0.50 cm; HPD95 (-0.81, -0.20)] but with similar ham weight and loin depth. These results provide evidence that lean weight can be improved restraining the genetic change in IMF. However, they also stress that a complete restriction on IMF is difficult to achieve unless selection is practiced on a big population where IMF is accurately predicted.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.2527/jas.2013-6282
http://hdl.handle.net/10459.1/67942
url https://doi.org/10.2527/jas.2013-6282
http://hdl.handle.net/10459.1/67942
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MEC//AGL2006-01243
info:eu-repo/grantAgreement/MICINN//AGL2009-09779
info:eu-repo/grantAgreement/MICINN//BES-2010-034607
Versió postprint del document publicat a: https://doi.org/10.2527/jas.2013-6282
Journal of Animal Science, 2013, vol. 91, num. 8, p. 3514-3521
dc.rights.none.fl_str_mv (c) American Society of Animal Science, 2013
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Society of Animal Science, 2013
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Society of Animal Science
publisher.none.fl_str_mv American Society of Animal Science
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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