English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Sheep milk and products made from it are a source of valuable nutritional substances for human nutrition. In comparison to cow milk, sheep milk contains a higher content of milk fat and it is composited of a higher proportion of polyunsaturated fatty acids (PUFA), especially essential α-linolenic acid and conjugated linoleic acid (CLA). Also, a lower saturated fatty acid (SFA) content is present in sheep milk than in cow and goat milk (Moioli et al., 2012; Markiewicz-Kęszycka et al., 2013). Modification of the fatty acid (FA) profile in milk fat with a possibility of increasing the content of nutritionally essential FAs, such as n-3 FA especially CLA, has been an object of many types of research (Reynolds et al., 2006; Sánchez et al., 2010; Moioli et al., 2012; Buccioni et al., 2015). Crucial factors influencing the FA profile in sheep milk are feed composition, lactation stage, breed, and last but not least, genetic factors. Fatty acids essential for milk fat triacylglycerols (TAG) synthesis in the mammary gland are obtained in two ways. The one is de novo synthesis in the secretory cells of the ABSTRACT. The aim of the study was to evaluate the influence of single nucleotide polymorphism (SNP) in lipoprotein lipase gene (LPL) on the basic sheep milk parameters and the fatty acid profile in milk and yoghurt drinks made from it. The Primer Extension Analysis was used for genotyping 3 SNPs at positions: 74 (T/C), 130 (T/C) and 133 (T/A) in the 3 ́UTR region of the ovine LPL gene in 139 sheep of the East Friesian breed. According to the LPL genetic marker (CCCCAA and CTCTAT) 40 sheep were selected and divided into groups. Pooled milk was collected from May to June and used to make yoghurt drinks with probiotics and prebiotics according to the genetic combination. In the pooled samples used for yoghurt production, the contents of fat, protein, lactose and total solids have been determined. The profile of fatty acids in fat from milk pooled samples as well as from yoghurt drinks has been analysed. Differences in the composition of milk and fatty acid profile were shown. The content of fat and total solids was significantly higher in the milk with the CTCTAT genotype combination in comparison to that with CCCCAA genotype. Moreover, these samples of milk and yoghurt products had a statistically lower content of palmitic acid and a significantly lower content of hypocholesterolemic acids. Targeted production of sheep milk from animals with different genotypes of the LPL may positively influence the fatty acid profile in milk and products made from it. Received: 18 March 2020 Revised: 25 February 2021 Accepted: 1 March 2021

journal of animal and feed sciences

The influence of lipoprotein lipase gene polymorphism in Czech East Friesian sheep on the fatty acid profile in milk and yoghurt drinks – a preliminary study