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Relationship of β-casein genotypes (A1A1, A1A2 and A2A2) to the physicochemical composition and sensory characteristics of cows’ milk

2022; Taylor & Francis; Volume: 50; Issue: 1 Linguagem: Inglês

10.1080/09712119.2022.2046005

0974-1844

Kristina de Vitte, Sigita Kerzienė, Jolita Klementavičiūtė, Marius de Vitte, Ramutė Mišeikienė, Ieva Kudlinskienė, Justė Čepaitė, Vaida Dilbienė, Rolandas Stankevičius,

Effects of Environmental Stressors on Livestock

This study determines the relationship between β-casein CSN2 genotypes (A1A1, A1A2, A2A2) and milk's biochemical and sensory traits. Ninety-six cow's milk from the same herd was investigated. Animals were grouped according to the β-casein genotype variants A1A1, A1A2 and A2A2, with thirty-two animals each. A1A1 milk had higher monounsaturated fatty acids MUFA (<0.001) and lower levels of saturated fatty acids SFA (<0.001) fatty acids content. A1A2 milk had higher amino acids and higher SFA (<0.001) fatty acid content in the milk. Furthermore, A1A2 milk had the highest lightness index (L*) (<0.001), which we found correlated to increased redness index (a*) (<0.001) and yellowness index (b*) (<0.01) values. A2A2 milk was higher in polyunsaturated fatty acids PUFA (<0.001), omega-3 (0.001) and omega-6 (<0.001) and lower saturated fatty acids SFA (<0.001) fatty acids content. We concluded that the amino acid content, fatty acid content and colour of the milk could be influenced by CSN2 genotypes A1A1, A1A2 and A2A2. As a result, the selective breeding of genotypes with preferred qualities may improve milk and dairy products.