Reiche, A.-M.; Martín-Hernández, M. C.; Spengler Neff, A.; Bapst, B.; Fleuti, C.; Dohme-Meier, F.; Hess, H. D.; Egger, L. and Portmann, R. (2024) The A1/A2 β-casein genotype of cows, but not their horn status, influences peptide generation during simulated digestion of milk. Journal of Dairy Science, 107 (9), pp. 6425-6436.
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Document available online at: https://www.sciencedirect.com/science/article/pii/S0022030224005745?via%3Dihub
Summary in the original language of the document
The effect of the horn status of cows on their milk composition and quality is a controversial research topic. In this study, 128 milk samples from 64 horned and 64 disbudded Brown Swiss and Original Braunvieh cows were collected from alpine farms where both horned and disbudded cows were grazing on mountain pastures. The samples were analyzed for their detailed composition and protein digestion in a simulated in vitro digestion (INFOGEST). To exclude probable influences on digestion, the β-CN genotype with its variants A1 and A2 was also included in the study. The effects of horn status and β-CN genotype were investigated in linear mixed models, which included additional influencing random factors such as Original Braunvieh blood proportion, stage of lactation, and farm. Horn status did not have any effect on milk composition or digestion. In contrast, milk from A1A1 cows showed a different protein digestion than milk of A1A2 and A2A2 cows in the gastric phase, including smaller amounts of β-casomorphin(BCM)21-associated peptides and larger amounts of BCM11-associated peptides. Abundances of BCM7 did not differ between β-CN genotypes. At the end of the intestinal phase, the digested milk of A1A1 and A2A2 β-CN genotypes did not differ.
EPrint Type: | Journal paper |
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Keywords: | beta-casomorphin, horns, in vitro digestion, milk quality, composition, Abacus, FiBL50110 |
Agrovoc keywords: | Language Value URI English horns http://aims.fao.org/aos/agrovoc/c_3665 English in vitro digestibility http://aims.fao.org/aos/agrovoc/c_34856 English milk composition http://aims.fao.org/aos/agrovoc/c_b0b8d068 English breeding http://aims.fao.org/aos/agrovoc/c_49902 |
Subjects: | Animal husbandry > Production systems > Dairy cattle |
Research affiliation: | Switzerland > Agroscope Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Animal > Animal breeding Switzerland > Other organizations Switzerland |
DOI: | 10.3168/jds.2024-24403 |
Related Links: | https://www.fibl.org/en/themes/projectdatabase/projectitem/project/1749, https://www.bio-kb-stiere.ch/bio-kb-stiere |
Deposited By: | Waldmeier, Bernadette |
ID Code: | 55612 |
Deposited On: | 08 May 2025 13:32 |
Last Modified: | 08 May 2025 13:34 |
Document Language: | English |
Status: | Published |
Refereed: | Peer-reviewed and accepted |
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