The Season Effect on the Milk Fatty Acid Profile of Oulmes Breed Cattle in Moroccan Oulmes Zone

Hamdani, MahaEl; AouatifBenali, AouatifBenali; Antari, AbderraoufEl; Housni, Abdellah El; AhmedDouaik, AhmedDouaik; Ounine, Khadija; Bouksaim, Mohammed

doi:10.9790/264x-03021317

Cited by 1 publication

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“…In the present study, higher numbers of saturated fatty acids (SFA) were detected during summer in both animal groups. However, trends in HF were found to be consistent with previous reports of the higher mean value of SFA during summer, and a higher level of unsaturation mean value was detected during the winter season [ 38 ], while it has been reported for the first time in J buffalo. The extent of unsaturation plays a vital role in the processing and physical properties of dairy products, for instance, the melting point and spread ability of fat are dependent on the acyl chain length and the degree of unsaturation [ 39 , 40 ].…”

Section: Resultssupporting

confidence: 90%

Comparative Analysis of Milk Triglycerides Profile between Jaffarabadi Buffalo and Holstein Friesian Cow

et al. 2020

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Milk lipids are known for a variety of biological functions, however; little is known about compositional variation across breeds, especially for Jaffarabadi buffalo, an indigenous Indian breed. Systematic profiling of extracted milk lipids was performed by mass spectrometry across summer and winter in Holstein Friesian cow and Jaffarabadi buffalo. Extensive MS/MS spectral analysis for the identification (ID) of probable lipid species using software followed by manual verification and grading of each assigned lipid species enabled ID based on (a) parent ion, (b) head group, and (c) partial/full acyl characteristic ions for comparative profiling of triacylglycerols between the breeds. Additionally, new triacylglycerol species with short-chain fatty acids were reported by manual interpretation of MS/MS spectra and comparison with curated repositories. Collectively, 1093 triacylglycerol species belonging to 141 unique sum compositions between the replicates of both the animal groups were identified. Relative quantitation at sum composition level followed by statistical analyses revealed changes in relative abundances of triacylglycerol species due to breed, season, and interaction effect of the two. Significant changes in triacylglycerols were observed between breeds (81%) and seasons (59%). When the interaction effect is statistically significant, a higher number of triacylglycerols species in Jaffarabadi has lesser seasonal variation than Holstein Friesian.

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Section: Resultssupporting

confidence: 90%