Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes
The present study aims to assess the effects of pig’s genotype (lean v. fatty) and dietary protein level (control v. reduced) on intramuscular fat (IMF) content, fatty acid composition and fibre profile of psoas major, a representative red muscle in pig’s carcass scarcely studied relative to white l...
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doaj-10ab3bda26a1431f809b22558e4cedf22021-06-06T04:53:27ZengElsevierAnimal1751-73112017-01-01111120942102Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypesM.S. Madeira0P.A. Lopes1P. Costa2D. Coelho3C.M. Alfaia4J.A.M. Prates5CIISA, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisboa, PortugalCIISA, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisboa, PortugalCIISA, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisboa, PortugalCIISA, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisboa, PortugalCIISA, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisboa, PortugalCIISA, Faculdade de Medicina Veterinária, Universidade de Lisboa, 1300-477 Lisboa, PortugalThe present study aims to assess the effects of pig’s genotype (lean v. fatty) and dietary protein level (control v. reduced) on intramuscular fat (IMF) content, fatty acid composition and fibre profile of psoas major, a representative red muscle in pig’s carcass scarcely studied relative to white longissimus lumborum. The experiment was conducted on 40 intact male pigs (20 Alentejana purebred and 20 Large White×Landrace×Pietrain crossbred) from 60 to 93 kg of live weight. Pigs were divided and allocated to four dietary groups: control protein diet equilibrated for lysine (17.5% of CP and 0.7% of lysine) and reduced protein diet (RPD) not equilibrated for lysine (13.1% of crude protein and 0.4% of lysine) within a 2×2 factorial arrangement (two genotypes and two diets). Alentejana purebred had higher IMF content (15.7%) and monounsaturated fatty acids (MUFA) (8.9%), whereas crossbred pigs had higher PM weight (46.3%) and polyunsaturated fatty acids (PUFA) (20.1%). The genotype also affected colour with higher lightness (15.1%) and yellowness (33.8%) and lower redness (9.9%) scores in crossbred pigs. In line with this, fatty pigs displayed more oxidative fibres (29.5%), whilst lean pigs had more glycolytic (54.4%). Relative to fatty acids, RPD increased MUFA (5.2%) and SFA (3.2%) but decreased PUFA (14.8%). Ultimately, RPD increased IMF content (15.7%) in the red muscle under study, with no impact on glycolytic to oxidative fibre type transformation.http://www.sciencedirect.com/science/article/pii/S1751731117000921reduced protein dietsintramuscular fatfatty acid compositionfibre profilepsoas major |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
M.S. Madeira P.A. Lopes P. Costa D. Coelho C.M. Alfaia J.A.M. Prates |
spellingShingle |
M.S. Madeira P.A. Lopes P. Costa D. Coelho C.M. Alfaia J.A.M. Prates Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes Animal reduced protein diets intramuscular fat fatty acid composition fibre profile psoas major |
author_facet |
M.S. Madeira P.A. Lopes P. Costa D. Coelho C.M. Alfaia J.A.M. Prates |
author_sort |
M.S. Madeira |
title |
Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes |
title_short |
Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes |
title_full |
Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes |
title_fullStr |
Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes |
title_full_unstemmed |
Reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes |
title_sort |
reduced protein diets increase intramuscular fat of psoas major, a red muscle, in lean and fatty pig genotypes |
publisher |
Elsevier |
series |
Animal |
issn |
1751-7311 |
publishDate |
2017-01-01 |
description |
The present study aims to assess the effects of pig’s genotype (lean v. fatty) and dietary protein level (control v. reduced) on intramuscular fat (IMF) content, fatty acid composition and fibre profile of psoas major, a representative red muscle in pig’s carcass scarcely studied relative to white longissimus lumborum. The experiment was conducted on 40 intact male pigs (20 Alentejana purebred and 20 Large White×Landrace×Pietrain crossbred) from 60 to 93 kg of live weight. Pigs were divided and allocated to four dietary groups: control protein diet equilibrated for lysine (17.5% of CP and 0.7% of lysine) and reduced protein diet (RPD) not equilibrated for lysine (13.1% of crude protein and 0.4% of lysine) within a 2×2 factorial arrangement (two genotypes and two diets). Alentejana purebred had higher IMF content (15.7%) and monounsaturated fatty acids (MUFA) (8.9%), whereas crossbred pigs had higher PM weight (46.3%) and polyunsaturated fatty acids (PUFA) (20.1%). The genotype also affected colour with higher lightness (15.1%) and yellowness (33.8%) and lower redness (9.9%) scores in crossbred pigs. In line with this, fatty pigs displayed more oxidative fibres (29.5%), whilst lean pigs had more glycolytic (54.4%). Relative to fatty acids, RPD increased MUFA (5.2%) and SFA (3.2%) but decreased PUFA (14.8%). Ultimately, RPD increased IMF content (15.7%) in the red muscle under study, with no impact on glycolytic to oxidative fibre type transformation. |
topic |
reduced protein diets intramuscular fat fatty acid composition fibre profile psoas major |
url |
http://www.sciencedirect.com/science/article/pii/S1751731117000921 |
work_keys_str_mv |
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