Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat
This research communications addresses the hypothesis that a part of iso 17:0 and anteiso 17:0 in milk fat could come from endogenous extraruminal tissue synthesis. In order to confirm this a linear regression model was applied to calculate the proportions of iso 17:0 and anteiso 17:0 in milk fat that could come from elongation of their putative precursors iso 15:0 and anteiso 15:0, respectively. Sixteen dairy goats were allocated to two simultaneous experiments, in a crossover design with four animals per treatment and two experimental periods of 25 d. In both experiments, alfalfa hay was the sole forage and the forage to concentrate ratio (33 : 67) remained constant. Experimental diets differed on the concentrate composition, either rich in starch or neutral detergent fibre, and they were administered alone or in combination with 30 g/d of linseed oil. Iso 15:0, anteiso 15:0, iso 17:0 and anteiso 17:0, the most abundant branched-chain fatty acids in milk fat, were determined by gas chromatography using two different capillary columns. The regression model resolved that 49% of iso 17:0 and 60% of anteiso 17:0 in milk fat was formed extraruminally from iso 15:0 and anteiso 15:0 elongation.
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Cambridge University Press
2019
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Subjects: | Branched-chain fatty acids, Elongase, Goat, Milk, |
Online Access: | http://hdl.handle.net/10261/208282 http://dx.doi.org/10.13039/501100003329 |
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dig-cial-es-10261-2082822020-04-21T01:05:15Z Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat Gómez-Cortés, Pilar Cívico, Alfonso Fuente, Miguel Ángel de la Martínez Marín, A. L. Ministerio de Economía y Competitividad (España) Branched-chain fatty acids Elongase Goat Milk This research communications addresses the hypothesis that a part of iso 17:0 and anteiso 17:0 in milk fat could come from endogenous extraruminal tissue synthesis. In order to confirm this a linear regression model was applied to calculate the proportions of iso 17:0 and anteiso 17:0 in milk fat that could come from elongation of their putative precursors iso 15:0 and anteiso 15:0, respectively. Sixteen dairy goats were allocated to two simultaneous experiments, in a crossover design with four animals per treatment and two experimental periods of 25 d. In both experiments, alfalfa hay was the sole forage and the forage to concentrate ratio (33 : 67) remained constant. Experimental diets differed on the concentrate composition, either rich in starch or neutral detergent fibre, and they were administered alone or in combination with 30 g/d of linseed oil. Iso 15:0, anteiso 15:0, iso 17:0 and anteiso 17:0, the most abundant branched-chain fatty acids in milk fat, were determined by gas chromatography using two different capillary columns. The regression model resolved that 49% of iso 17:0 and 60% of anteiso 17:0 in milk fat was formed extraruminally from iso 15:0 and anteiso 15:0 elongation. This work was supported by the Ministerio de Economía y Competitividad (Project AGL2016-75159-C2-2-R). Peer reviewed 2020-04-20T10:36:44Z 2020-04-20T10:36:44Z 2019 artículo http://purl.org/coar/resource_type/c_6501 Journal of Dairy Research 86(4): 461-463 (2019) 0022-0299 http://hdl.handle.net/10261/208282 10.1017/S0022029919000712 1469-7629 http://dx.doi.org/10.13039/501100003329 31722762 en #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AGL2016-75159-C2-2-R https://doi.org/10.1017/S0022029919000712 Sí none Cambridge University Press |
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Branched-chain fatty acids Elongase Goat Milk Branched-chain fatty acids Elongase Goat Milk |
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Branched-chain fatty acids Elongase Goat Milk Branched-chain fatty acids Elongase Goat Milk Gómez-Cortés, Pilar Cívico, Alfonso Fuente, Miguel Ángel de la Martínez Marín, A. L. Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat |
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This research communications addresses the hypothesis that a part of iso 17:0 and anteiso 17:0 in milk fat could come from endogenous extraruminal tissue synthesis. In order to confirm this a linear regression model was applied to calculate the proportions of iso 17:0 and anteiso 17:0 in milk fat that could come from elongation of their putative precursors iso 15:0 and anteiso 15:0, respectively. Sixteen dairy goats were allocated to two simultaneous experiments, in a crossover design with four animals per treatment and two experimental periods of 25 d. In both experiments, alfalfa hay was the sole forage and the forage to concentrate ratio (33 : 67) remained constant. Experimental diets differed on the concentrate composition, either rich in starch or neutral detergent fibre, and they were administered alone or in combination with 30 g/d of linseed oil. Iso 15:0, anteiso 15:0, iso 17:0 and anteiso 17:0, the most abundant branched-chain fatty acids in milk fat, were determined by gas chromatography using two different capillary columns. The regression model resolved that 49% of iso 17:0 and 60% of anteiso 17:0 in milk fat was formed extraruminally from iso 15:0 and anteiso 15:0 elongation. |
author2 |
Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Gómez-Cortés, Pilar Cívico, Alfonso Fuente, Miguel Ángel de la Martínez Marín, A. L. |
format |
artículo |
topic_facet |
Branched-chain fatty acids Elongase Goat Milk |
author |
Gómez-Cortés, Pilar Cívico, Alfonso Fuente, Miguel Ángel de la Martínez Marín, A. L. |
author_sort |
Gómez-Cortés, Pilar |
title |
Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat |
title_short |
Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat |
title_full |
Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat |
title_fullStr |
Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat |
title_full_unstemmed |
Application of a linear regression model to study the origin of C17 branched-chain fatty acids in caprine milk fat |
title_sort |
application of a linear regression model to study the origin of c17 branched-chain fatty acids in caprine milk fat |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
http://hdl.handle.net/10261/208282 http://dx.doi.org/10.13039/501100003329 |
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