Journal ArticleDOI
Diet, rumen biohydrogenation and nutritional quality of cow and goat milk fat
TLDR
More studies in rodents and humans fed dairy products modified by changing ruminant diet are required before recommending a larger use of lipid sources and how to combine them with the different feeding systems used by dairy farmers.Abstract:
The potential to modify the milk fatty acid (FA) composition by changing the cow or goat diets is reviewed. Ruminal biohydrogenation (RBH), combined with mammary lipogenic and A-9 desaturation pathways, considerably modifies the profile of dietary FA and thus milk composition. The pasture has major effects by decreasing saturated FA and increasing FA considered as favorable for human health (c9-18:1, 18:3n-3 and c9t11-CLA), compared to winter diets, especially those based on maize silage and concentrates. Plant lipid supplements have effects similar to pasture, especially linseed, but they increase to a larger extent, simultaneously several trans isomers of 18:1 and, conjugated or non-conjugated 18:2, especially when added to maize silage or concentrate-rich diets. The goat responds better for milk 18:3n-3 and c9t11-CLA, and sometimes less for c9-18:1, and is less prone to the RBH trans-11 to trans-10 shift, which has been shown to be time dependent in the cow. The respective physiological roles of most milk trans FA have not been studied to date, and more studies in rodents and humans fed dairy products modified by changing ruminant diet are required before recommending a larger use of lipid sources and how to combine them with the different feeding systems used by dairy farmers.read more
Citations
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Journal ArticleDOI
Traditional cheeses: Rich and diverse microbiota with associated benefits
Marie-Christine Montel,Solange Buchin,Adrien Mallet,Céline Delbès-Paus,Dominique A. Vuitton,Nathalie Desmasures,Françoise Berthier +6 more
TL;DR: In the future, the use of meta-omics methods should help to decipher how traditional cheese ecosystems form and function, opening the way to new methods of risk-benefit management from farm to ripened cheese.
Journal ArticleDOI
Recent developments in altering the fatty acid composition of ruminant-derived foods
TL;DR: Although nutrition is the major factor influencing the fatty acid composition of ruminant-derived foods, further progress can be expected through the use of genomic or marker-assisted selection to increase the frequency of favourable genotypes and the formulation of diets to exploit this genetic potential.
Journal ArticleDOI
Methane output and diet digestibility in response to feeding dairy cows crude linseed, extruded linseed, or linseed oil.
TL;DR: Optimal conditions for the utilization of linseed FA in ruminant diets need to be determined before recommending its use for the dairy industry, and the form of presentation of lin Seed FA greatly influences methane output from dairy cows is studied.
Journal ArticleDOI
Role of trans fatty acids in the nutritional regulation of mammary lipogenesis in ruminants
TL;DR: Variation in mammary fatty acid secretion and lipogenic responses to changes in diet composition between ruminants reflect inherent interspecies differences in ruminal lipid metabolism and mammary specific regulation of cellular processes and key lipogenic enzymes involved in the synthesis of milk fat triacylglycerides.
Journal ArticleDOI
Can enteric methane emissions from ruminants be lowered without lowering their production
C. Grainger,K. A. Beauchemin +1 more
TL;DR: McAllister et al. as mentioned in this paper reviewed the most promising dietary and farm system strategies to mitigate enteric CH4 emissions from ruminants, and their potential effects on animal production.
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