02387naa a2200277 a 450000100080000000500110000800800410001902200150006002400320007510000170010724501960012426000090032050003580032952011230068765300190181065300230182965300270185265300090187970000130188870000140190170000140191570000160192970000160194570000250196177301230198610641902023-06-13       2023    bl uuuu     u00u1 u    #d  a2666-9102.7 a10.3168/jdsc.2022-02732DOI1 aTECHEIRA, N.  aMilk fatty acid profile from grass feeding strategies on 2 Holstein genotypesbImplications for health and technological properties. (Short Communication, Dairy Foods).h[electronic resource]  c2023  aArticle history: Received 14 June 2022, Accepted 17 November 2022, Available online 16 February 2023, Version of Record 8 June 2023. -- Corresponding author: nora.techeira@utec.edu.uy -- Funding: This study received no external funding. -- License: This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/) --  aABSTRACT.- The objective of the study was to determine if a feeding system with a variable supply of grass promoted rapid changes in the fatty acid profile and technological and health indices of milk obtained from North American (NAHF) and New Zealand (NZHF) Holstein-Friesian cows. Two feeding strategies were conducted: fixed grass (GFix) and maximized grass intake when available (GMax). The results showed that as the grass intake increased in the GMax treatments, the relative amount of palmitic acid in milk decreased, whereas oleic, linoleic, linolenic, and conjugated linoleic acids increased, causing a reduction in the atherogenic, thrombogenic, and spreadability calculated indices. The changes occurred in rapid response to the changing diet, with reductions ranging from approximately 5 to 15% in the healthy and technological indices within a period of 15 d of grass intake increase. Differences were found between the 2 genotypes, with NZHF responding faster to changes in grass intake. © 2023, The Authors. Published by Elsevier Inc. and Fass Inc. on behalf of the American Dairy Science Association.  aFeeding system  aFixed grass (GFix)  aMaximized grass (GMax)  aMilk1 aKEEL, K.1 aGARAY, A.1 aHARTE, F.1 aMENDOZA, A.1 aFARIÑA, S.1 aLÓPEZ-PEDEMONTE, T.  tJDS Communications. May 2023, Volume 4, Issue 3, Pages 169-174. https://doi.org/10.3168/jdsc.2022-0273 -- OPEN ACCESS.