Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress

Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potent...
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Autor*in:	Wendy M. Rauw [verfasserIn] E. Johana Mayorga [verfasserIn] Soi Meng Lei [verfasserIn] Jack C. M. Dekkers [verfasserIn] John F. Patience [verfasserIn] Nicholas K. Gabler [verfasserIn] Steven M. Lonergan [verfasserIn] Lance H. Baumgard [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2017

Schlagwörter:	pigs selection heat stress robustness resilience growth

Übergeordnetes Werk:	In: Frontiers in Genetics - Frontiers Media S.A., 2011, 8(2017)
Übergeordnetes Werk:	volume:8 ; year:2017

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3389/fgene.2017.00155

Katalog-ID:	DOAJ075544180

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520			\|a Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN.
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allfields	10.3389/fgene.2017.00155 doi (DE-627)DOAJ075544180 (DE-599)DOAJac4f5064c26b41f9803b2ba875f54d2e DE-627 ger DE-627 rakwb eng QH426-470 Wendy M. Rauw verfasserin aut Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN. pigs selection heat stress robustness resilience growth Genetics Wendy M. Rauw verfasserin aut E. Johana Mayorga verfasserin aut Soi Meng Lei verfasserin aut Jack C. M. Dekkers verfasserin aut John F. Patience verfasserin aut Nicholas K. Gabler verfasserin aut Steven M. Lonergan verfasserin aut Lance H. Baumgard verfasserin aut In Frontiers in Genetics Frontiers Media S.A., 2011 8(2017) (DE-627)65799829X (DE-600)2606823-0 16648021 nnns volume:8 year:2017 https://doi.org/10.3389/fgene.2017.00155 kostenfrei https://doaj.org/article/ac4f5064c26b41f9803b2ba875f54d2e kostenfrei http://journal.frontiersin.org/article/10.3389/fgene.2017.00155/full kostenfrei https://doaj.org/toc/1664-8021 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 8 2017
spelling	10.3389/fgene.2017.00155 doi (DE-627)DOAJ075544180 (DE-599)DOAJac4f5064c26b41f9803b2ba875f54d2e DE-627 ger DE-627 rakwb eng QH426-470 Wendy M. Rauw verfasserin aut Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN. pigs selection heat stress robustness resilience growth Genetics Wendy M. Rauw verfasserin aut E. Johana Mayorga verfasserin aut Soi Meng Lei verfasserin aut Jack C. M. Dekkers verfasserin aut John F. Patience verfasserin aut Nicholas K. Gabler verfasserin aut Steven M. Lonergan verfasserin aut Lance H. Baumgard verfasserin aut In Frontiers in Genetics Frontiers Media S.A., 2011 8(2017) (DE-627)65799829X (DE-600)2606823-0 16648021 nnns volume:8 year:2017 https://doi.org/10.3389/fgene.2017.00155 kostenfrei https://doaj.org/article/ac4f5064c26b41f9803b2ba875f54d2e kostenfrei http://journal.frontiersin.org/article/10.3389/fgene.2017.00155/full kostenfrei https://doaj.org/toc/1664-8021 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 8 2017
allfields_unstemmed	10.3389/fgene.2017.00155 doi (DE-627)DOAJ075544180 (DE-599)DOAJac4f5064c26b41f9803b2ba875f54d2e DE-627 ger DE-627 rakwb eng QH426-470 Wendy M. Rauw verfasserin aut Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN. pigs selection heat stress robustness resilience growth Genetics Wendy M. Rauw verfasserin aut E. Johana Mayorga verfasserin aut Soi Meng Lei verfasserin aut Jack C. M. Dekkers verfasserin aut John F. Patience verfasserin aut Nicholas K. Gabler verfasserin aut Steven M. Lonergan verfasserin aut Lance H. Baumgard verfasserin aut In Frontiers in Genetics Frontiers Media S.A., 2011 8(2017) (DE-627)65799829X (DE-600)2606823-0 16648021 nnns volume:8 year:2017 https://doi.org/10.3389/fgene.2017.00155 kostenfrei https://doaj.org/article/ac4f5064c26b41f9803b2ba875f54d2e kostenfrei http://journal.frontiersin.org/article/10.3389/fgene.2017.00155/full kostenfrei https://doaj.org/toc/1664-8021 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 8 2017
allfieldsGer	10.3389/fgene.2017.00155 doi (DE-627)DOAJ075544180 (DE-599)DOAJac4f5064c26b41f9803b2ba875f54d2e DE-627 ger DE-627 rakwb eng QH426-470 Wendy M. Rauw verfasserin aut Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN. pigs selection heat stress robustness resilience growth Genetics Wendy M. Rauw verfasserin aut E. Johana Mayorga verfasserin aut Soi Meng Lei verfasserin aut Jack C. M. Dekkers verfasserin aut John F. Patience verfasserin aut Nicholas K. Gabler verfasserin aut Steven M. Lonergan verfasserin aut Lance H. Baumgard verfasserin aut In Frontiers in Genetics Frontiers Media S.A., 2011 8(2017) (DE-627)65799829X (DE-600)2606823-0 16648021 nnns volume:8 year:2017 https://doi.org/10.3389/fgene.2017.00155 kostenfrei https://doaj.org/article/ac4f5064c26b41f9803b2ba875f54d2e kostenfrei http://journal.frontiersin.org/article/10.3389/fgene.2017.00155/full kostenfrei https://doaj.org/toc/1664-8021 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 8 2017
allfieldsSound	10.3389/fgene.2017.00155 doi (DE-627)DOAJ075544180 (DE-599)DOAJac4f5064c26b41f9803b2ba875f54d2e DE-627 ger DE-627 rakwb eng QH426-470 Wendy M. Rauw verfasserin aut Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN. pigs selection heat stress robustness resilience growth Genetics Wendy M. Rauw verfasserin aut E. Johana Mayorga verfasserin aut Soi Meng Lei verfasserin aut Jack C. M. Dekkers verfasserin aut John F. Patience verfasserin aut Nicholas K. Gabler verfasserin aut Steven M. Lonergan verfasserin aut Lance H. Baumgard verfasserin aut In Frontiers in Genetics Frontiers Media S.A., 2011 8(2017) (DE-627)65799829X (DE-600)2606823-0 16648021 nnns volume:8 year:2017 https://doi.org/10.3389/fgene.2017.00155 kostenfrei https://doaj.org/article/ac4f5064c26b41f9803b2ba875f54d2e kostenfrei http://journal.frontiersin.org/article/10.3389/fgene.2017.00155/full kostenfrei https://doaj.org/toc/1664-8021 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 8 2017
language	English
source	In Frontiers in Genetics 8(2017) volume:8 year:2017
sourceStr	In Frontiers in Genetics 8(2017) volume:8 year:2017
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	pigs selection heat stress robustness resilience growth Genetics
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container_title	Frontiers in Genetics
authorswithroles_txt_mv	Wendy M. Rauw @@aut@@ E. Johana Mayorga @@aut@@ Soi Meng Lei @@aut@@ Jack C. M. Dekkers @@aut@@ John F. Patience @@aut@@ Nicholas K. Gabler @@aut@@ Steven M. Lonergan @@aut@@ Lance H. Baumgard @@aut@@
publishDateDaySort_date	2017-01-01T00:00:00Z
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language_de	englisch
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callnumber-first	Q - Science
author	Wendy M. Rauw
spellingShingle	Wendy M. Rauw misc QH426-470 misc pigs misc selection misc heat stress misc robustness misc resilience misc growth misc Genetics Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress
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topic_title	QH426-470 Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress pigs selection heat stress robustness resilience growth
topic	misc QH426-470 misc pigs misc selection misc heat stress misc robustness misc resilience misc growth misc Genetics
topic_unstemmed	misc QH426-470 misc pigs misc selection misc heat stress misc robustness misc resilience misc growth misc Genetics
topic_browse	misc QH426-470 misc pigs misc selection misc heat stress misc robustness misc resilience misc growth misc Genetics
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title	Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress
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title_full	Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress
author_sort	Wendy M. Rauw
journal	Frontiers in Genetics
journalStr	Frontiers in Genetics
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author_browse	Wendy M. Rauw E. Johana Mayorga Soi Meng Lei Jack C. M. Dekkers John F. Patience Nicholas K. Gabler Steven M. Lonergan Lance H. Baumgard
container_volume	8
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author-letter	Wendy M. Rauw
doi_str_mv	10.3389/fgene.2017.00155
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title_sort	effects of diet and genetics on growth performance of pigs in response to repeated exposure to heat stress
callnumber	QH426-470
title_auth	Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress
abstract	Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN.
abstractGer	Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN.
abstract_unstemmed	Heat stress (HS) is one of the costliest issues in the U.S. pork industry. Aims of the present study were to determine the consequences of repeated exposure to HS on growth performance, and the effects of a high fiber diet, the genetic potential for high lean tissue accretion, and the genetic potential for residual feed intake (RFI) on resilience to HS. Barrows (n = 97) from three genetic lines (commercial, high RFI, low RFI) where subjected three times to a 4-day HS treatment (HS1, HS2, and HS3) which was preceded by a 9-day neutral (TN) adaptation period (TN1) and alternated by 7-day periods of neutral temperatures (TN2, TN3, and TN4). Body weight gain (BWG), feed intake (FI), feed conversion efficiency (FCE), RFI, and the drop in BWG and FI between TN and HS were estimated for each period, and slaughter traits were measured at the end of TN4. Commercial pigs had lower FI when fed a high fiber diet compared to a regular diet (2.70 ± 0.08 vs. 2.96 ± 0.08 kg/d; P < 0.05), while no differences were found for BWG, RFI or FCE. HS reduced FI, BWG, and FCE, increased RFI, and resulted in leaner pigs that generate smaller carcasses at slaughter. In TN, commercial pigs grew faster than the low and high RFI pigs (1.22 ± 0.06 vs. 0.720 ± 0.05 and 0.657 ± 0.07; P < 0.001) but growth rates were not significantly different between the lines during HS. Growth rates for the low RFI and high RFI pigs were similar both during TN and during HS. Pigs of interest for genetic improvement are those that are able to maintain growth rates during HS. Our results show that response in growth to HS was repeatable over subsequent 4-d HS cycles, which suggests the potential for including this response in the breeding index. The best performing animals during HS are likely those that are not highly superior for growth in TN.
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title_short	Effects of Diet and Genetics on Growth Performance of Pigs in Response to Repeated Exposure to Heat Stress
url	https://doi.org/10.3389/fgene.2017.00155 https://doaj.org/article/ac4f5064c26b41f9803b2ba875f54d2e http://journal.frontiersin.org/article/10.3389/fgene.2017.00155/full https://doaj.org/toc/1664-8021
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author2	Wendy M. Rauw E. Johana Mayorga Soi Meng Lei Jack C. M. Dekkers John F. Patience Nicholas K. Gabler Steven M. Lonergan Lance H. Baumgard
author2Str	Wendy M. Rauw E. Johana Mayorga Soi Meng Lei Jack C. M. Dekkers John F. Patience Nicholas K. Gabler Steven M. Lonergan Lance H. Baumgard
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doi_str	10.3389/fgene.2017.00155
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up_date	2024-07-03T15:30:05.043Z
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