Impact of Lactation Stage on the Metabolite Composition of Bovine Milk

Connolly, Claire; Yin, Xiaofei; Brennan, Lorraine

doi:10.3390/molecules28186608

Cited by 3 publications

(4 citation statements)

References 34 publications

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“…The freezing point indicator was slightly negative, and the content of somatic cells is slightly positively associated with the day of lactation. The data obtained were consistent with research (Connolly et al, 2023) on the influence of the lactation stage on the level of milk yield and milk quality indicators.…”

Section: Source: Compiled By the Authorssupporting

confidence: 89%

“…The main criteria for milk quality that the EU pays attention to are total bacterial count, somatic cell count, freezing point, fat and protein content. Thus, using the multi-platform approach, C. Connolly et al (2023) found that the metabolomic profile of cow milk at the beginning of lactation is markedly different from that in the middle and end of lactation. R. This fact is confirmed by studies of the first streams of milk, in which the fat content is lower, and the protein content is higher.…”

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confidence: 99%

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Determination of milk quality indicators and first streams depending on the stage of lactation and daily milk yield

Tkachova,

Prusova,

Petrash

et al. 2024

Scientific Horizons

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The relevance of the study is to solve the problem of cow's milk quality and the influence of factors of lactation stage and daily milk yield on milk parameters, and to establish links between the content of somatic cells in milk and other milk parameters. The purpose of the study was to determine the influence of the lactation stage and daily milk yield on the quality indicators of milk and its first streams, and to establish links between the content of somatic cells and other indicators of the quality of milk and its first streams. Research methods – zootechnical (selection of groups, organisation of the experiment, determination of milk productivity, assessment of the stage of lactation, the level of milk yields, control milking), biochemical (determination of the main indicators of milk quality), statistical, mathematical. A significant difference between milk quality indicators in the daily milk yield and in the first three streams of milk (p≥0.95) was established, therefore, the need to separate the first streams of milk from the main milk yield was experimentally proved. It was found that the indicators of the quantity and quality of milk and its first streams in various degrees correlate with the stage of lactation, the highest daily milk yield was established in cows that were in the first trimester of lactation. Fluctuations in the quality indicators of milk and its first streams depending on the level of daily milk yield were established. It was found that the content of somatic cells in milk is quite significantly negatively associated with the indicators of lactose content and freezing point of milk, to a lesser extent – with daily milk yield, and positively – with the duration of lactation, protein and whey+casein content. In the first streams of milk, the correlation coefficients for milk productivity and quality did not exceed 0.250. The highest somatic cell content was positively correlated with the MSNF index, protein and whey+casein content, freezing point, urea content, and negatively correlated with daily milk yield and fat content. The findings can be used in milk production farms and when planning breeding work to improve the quality characteristics of milk by selection

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Section: Source: Compiled By the Authorssupporting

confidence: 89%

Section: Source: Compiled By the Authorsmentioning

confidence: 99%

Determination of milk quality indicators and first streams depending on the stage of lactation and daily milk yield

Tkachova,

Prusova,

Petrash

et al. 2024

Scientific Horizons

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Section: Source: Compiled By the Authorssupporting

confidence: 89%

“…Connolly et al (2023) found that the metabolomic profile of cow milk at the beginning of lactation is markedly different from that in the middle and end of lactation. R.Feliciano et al (2023) established seasonal patterns of milk quality indicators (fat and protein content) in different weather conditions throughout the year.…”

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confidence: 97%

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2024

Scientific Horizons

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Рішення Національної ради України з питань телебачення і радіомовлення № 1533. Ідентифікатор медіа -R30-01593 Науковий журнал включено до категорії А Переліку наукових фахових видань України, у яких можуть публікуватися результати дисертаційних робіт на здобуття наукових ступенів доктора та кандидата ветеринарних, економічних, сільськогосподарських і технічних наук зі спеціальностей: 051 -Економіка; 071 -Облік і оподаткування; 072 -Фінанси, банківська справа та страхування; 073 -Менеджмент; 075 -Маркетинг;

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Impact of dietary regime on the metabolomic profile of bovine buttermilk and whole milk powder

Connolly,

Timlin,

Hogan

et al. 2024

Metabolomics

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Introduction Bovine milk contains a rich matrix of nutrients such as carbohydrates, fat, protein and various vitamins and minerals, the composition of which is altered by factors including dietary regime. Objectives The objective of this research was to investigate the impact of dietary regime on the metabolite composition of bovine whole milk powder and buttermilk. Methods Bovine whole milk powder and buttermilk samples were obtained from spring-calving cows, consuming one of three diets. Group 1 grazed outdoors on perennial ryegrass which was supplemented with 5% concentrates; group 2 were maintained indoors and consumed a total mixed ration diet; and group 3 consumed a partial mixed ration diet consisting of perennial ryegrass during the day and total mixed ration maintained indoors at night. Results Metabolomic analysis of the whole milk powder (N = 27) and buttermilk (N = 29) samples was preformed using liquid chromatography-tandem mass spectrometry, with 504 and 134 metabolites identified in the samples respectively. In whole milk powder samples, a total of 174 metabolites from various compound classes were significantly different across dietary regimes (FDR adjusted p-value ≤ 0.05), including triglycerides, of which 66% had their highest levels in pasture-fed samples. Triglycerides with highest levels in pasture-fed samples were predominantly polyunsaturated with high total carbon number. Regarding buttermilk samples, metabolites significantly different across dietary regimes included phospholipids, sphingomyelins and an acylcarnitine. Conclusion In conclusion the results reveal a significant impact of a pasture-fed dietary regime on the metabolite composition of bovine dairy products, with a particular impact on lipid compound classes.

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Impact of Lactation Stage on the Metabolite Composition of Bovine Milk

Cited by 3 publications

References 34 publications

Determination of milk quality indicators and first streams depending on the stage of lactation and daily milk yield

Determination of milk quality indicators and first streams depending on the stage of lactation and daily milk yield

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Impact of dietary regime on the metabolomic profile of bovine buttermilk and whole milk powder

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