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Projects - SL (Sara) Pacheco Pappenheim MSc

Variation in Triacylglycerol (TAGs) composition in Bovine Milk Fat and its effect on Milk Fat physical properties

Milk Fat (MF) is one of the most important components of milk quality, influencing the technological, sensorial, and nutritional properties of milk and dairy products (Cozma et al., 2013). MF is composed of triacylglycerols (TAG) (> 95% of total lipids) with a wide range of fatty acids (FA) (about 400) with different chain length, sn-positional distribution and degrees of saturation (Jensen, 2002). TAGs determine the physical and functional properties of MF, therefore it is important to understand their composition and the positioning of the fatty acid (FA) within the glycerol backbone (Tzompa-Sosa et al. 2014).

Several studies show that FA and TAG composition can be modified through the alteration of cows feed (Lock at al., 2004, Grummer R., 1990, Sutton J., 1988). Together the Animal Nutrition Group, the Breeding and Genetics Group and the Food Quality and Design Group have been working on different feeding trials combined with selective breeding to analyze the impact of cows feed alteration and breeding selection on Milk composition and MF profiles.

The objectives of this project is to analyze the effect of feeding regimes, genetic and seasonal factors on the variations in TAG composition in MF and its effect on MF physical properties.