HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Effect of calcium salts of a mixture of conjugated linoleic acids containing trans-10, cis-12 in the diet on milk fat synthesis in goats

Abstract : Dietary supplements of conjugated linoleic acid (CLA) containing trans-10, cis-12 CLA decrease milk fat secretion in the lactating cow and sheep, but their effects on mammary lipogenesis in the goat are less well defined. Eight lactating goats were used in two 4 × 4 Latin-square experiments with 14 d experimental periods to examine the effects of calcium salts of CLA methyl esters (CaCLA) containing trans-10, cis-12 on milk fat synthesis. Experimental treatments consisted of incremental inclusion of 0, 30, 60 or 90 g of CaCLA/d (corresponding to 7·47, 14·9 and 22·4 g/d of trans-10, cis-12 CLA) offered during the first 10 d of each experimental period that replaced maize grain in concentrates (Experiment 1) or calcium salts of palm oil fatty acids (Experiment 2). Relative to the control, inclusion of 30, 60 or 90 g CaCLA/d in the diet reduced milk fat yield by 19·8, 27·9 and 32·3 % and 17·5, 39·0 and 49·3 % in Experiments 1 and 2, respectively. Decreases in milk fat were due to reductions in the secretion of fatty acids synthesised de novo rather than the uptake of fatty acids from the peripheral circulation. Indirect comparisons with the studies in the lactating cow indicated a lower efficacy of CaCLA supplements on mammary lipogenesis in the goat. In conclusion, CaCLA in the diet inhibits milk fat synthesis in the goat, responses that are dependent on the supply of dietary fatty acids, with evidence that the caprine is less sensitive to the anti-lipogenic effects of trans-10, cis-12 CLA compared with the bovine or ovine.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02664738
Contributor : Migration Prodinra Connect in order to contact the contributor
Submitted on : Sunday, May 31, 2020 - 5:23:50 AM
Last modification on : Thursday, August 5, 2021 - 3:49:44 AM

Links full text

Identifiers

Collections

Citation

Kevin J. Shingfield, Jacques Rouel, Yves Chilliard. Effect of calcium salts of a mixture of conjugated linoleic acids containing trans-10, cis-12 in the diet on milk fat synthesis in goats. British Journal of Nutrition, Cambridge University Press (CUP), 2009, 101 (7), pp.1006-1019. ⟨10.1017/S0007114508051696⟩. ⟨hal-02664738⟩

Share

Metrics

Record views

10