Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats
21 páginas, 8 tablas, 2 figuras
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American Dairy Science Association
2015
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| Subjects: | Milk fat depression, Goat, Cow, Milk fatty acid, |
| Online Access: | http://hdl.handle.net/10261/133397 http://dx.doi.org/10.13039/100008052 |
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dig-igm-es-10261-1333972021-03-18T16:13:19Z Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats Toral, Pablo G. Chilliard, Yves Rouel, J. Leskinen, H. Shingfield, Kevin J. Bernard, Laurence Fundación Alfonso Martín Escudero Milk fat depression Goat Cow Milk fatty acid 21 páginas, 8 tablas, 2 figuras A study with 2 ruminant species (goats and cows) with inherent differences in lipid metabolism was performed to test the hypothesis that milk fat depression (MFD) due to marine lipid supplements or diets containing high amounts of starch and plant oil is caused by different mechanisms and that each ruminant species responds differently. Cows and goats were allocated to 1 of 3 groups (4 cows and 5 goats per group) and fed diets containing no additional oil (control) or supplemented with fish oil (FO) or sunflower oil and wheat starch (SOS) according to a 3 x 3 Latin square design with 26-d experimental periods. In cows, milk fat content was lowered by FO and SOS (-31%), whereas only FO decreased milk fat content in goats (-21%) compared with the control. Furthermore, FO and SOS decreased milk fat yield in cows, but not in goats. In both species, FO and SOS decreased the secretion of <C16 and C16 fatty acids (FA), and FO lowered >C16 FA output. However, SOS increased milk secretion of >C16 FA in goats. Compared with the control, SOS resulted in similar increases in milk trans-10, cis-12 conjugated linoleic acid (CLA) in both species, but caused a 2-fold larger increase in trans-10 18:1 concentration in cows than for goats. Relative to the control, responses to FO in both species were characterized by a marked decrease in milk concentration of 18:0 (-74%) and cis-9 18:1 (-62%), together with a similar to 5-fold increase in total trans 18:1, but the proportionate changes in trans-10 18:1 were lower for goats. Direct comparison of animal performance and milk FA responses to FO and SOS treatments demonstrated interspecies differences in mammary lipogenesis, suggesting a lower sensitivity to the inhibitory effects of trans-10, cis-12 CLA in goats and that ruminal biohydrogenation pathways are more stable and less prone to diet-induced shifts toward the formation of trans-10-containing intermediates in goats compared with cows. Even though a direct cause and effect could not be established, results suggest that regulation of milk fat synthesis during FO-induced MFD may be related to a shortage of 18:0 for endogenous mammary cis-9 18:1 synthesis, increase in the incorporation of trans FA in milk triacylglycerols, and limitations in the synthesis of FA de novo to maintain milk fat melting point. However, the possible contribution of biohydrogenation intermediates with putative antilipogenic effects in the mammary gland, including trans-9,cis-11 CLA, trans-10 18:1, or cis-11 18:1 to FO-induced MFD cannot be excluded. P. G. Toral was granted a post-doctoral fellowship from Fundacion Alfonso Martin Escudero (Madrid, Spain). The authors gratefully acknowledge the staff of Unite Experimentale des Ruminants de Theix (INRA, Saint-Genes-Champanelle, France) for the diligent care of the experimental animals, and D. Bany, C. Delavaud, E. Tixier, and M. Tourret from UMR 1213 Herbivores (INRA) for assistance in sampling collection and laboratory analysis. The contribution of Laura Ventto and Minna Aalto (Natural Resources Institute Finland, Jokioinen, Finland, formerly MTT Agrifood Research Finland) to the analysis of milk fat composition is acknowledged and appreciated. Peer Reviewed 2016-06-14T07:56:31Z 2016-06-14T07:56:31Z 2015 2016-06-14T07:56:32Z artículo http://purl.org/coar/resource_type/c_6501 Journal of Dairy Science 98: 7277- 7297 (2015) 0022-0302 http://hdl.handle.net/10261/133397 10.3168/jds.2015-9649 1525-3198 http://dx.doi.org/10.13039/100008052 http://dx.doi.org/10.3168/jds.2015-9649 Sí none American Dairy Science Association |
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Milk fat depression Goat Cow Milk fatty acid Milk fat depression Goat Cow Milk fatty acid |
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Milk fat depression Goat Cow Milk fatty acid Milk fat depression Goat Cow Milk fatty acid Toral, Pablo G. Chilliard, Yves Rouel, J. Leskinen, H. Shingfield, Kevin J. Bernard, Laurence Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats |
| description |
21 páginas, 8 tablas, 2 figuras |
| author2 |
Fundación Alfonso Martín Escudero |
| author_facet |
Fundación Alfonso Martín Escudero Toral, Pablo G. Chilliard, Yves Rouel, J. Leskinen, H. Shingfield, Kevin J. Bernard, Laurence |
| format |
artículo |
| topic_facet |
Milk fat depression Goat Cow Milk fatty acid |
| author |
Toral, Pablo G. Chilliard, Yves Rouel, J. Leskinen, H. Shingfield, Kevin J. Bernard, Laurence |
| author_sort |
Toral, Pablo G. |
| title |
Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats |
| title_short |
Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats |
| title_full |
Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats |
| title_fullStr |
Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats |
| title_full_unstemmed |
Comparison of the nutritional regulation of milk fat secretion and composition in cows and goats |
| title_sort |
comparison of the nutritional regulation of milk fat secretion and composition in cows and goats |
| publisher |
American Dairy Science Association |
| publishDate |
2015 |
| url |
http://hdl.handle.net/10261/133397 http://dx.doi.org/10.13039/100008052 |
| work_keys_str_mv |
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