Influence of αs1-casein genetic polymorphism on lipidic and aromatic fractions in Cilentana goat

In order to evaluate the influence of αs1-casein genetic polymorphism on fatty acid, triacylglycerol and aromatic composition in Cilentana goat milk, 166 individual caprine milk samples from two farms were analysed by using of immuno- electrophoretic and gas-chromatographic techniques coupled to mass spectrometry analysis. More frequencies of “strong” alleles, αs1-CN A, B and H (0,42-0,35 and 0,04, respectively) were found than “weak” alleles, αs1-CN F and D (0,16 and 0,02, respectively). Comparing the triacylglycerol composition from goat’s milk containing “strong” and “weak” alleles, a higher content of C34, C44 and C46 occurred in the former, whereas a higher content of C50 e C52 in the latter. The different fat acidic composition was due to a more amount of short chain fatty acids, ϖ3, satured fatty acids, satured/unsatured more ratio in milk contained “strong” alleles than in “weak”. Finally, a more level of free fatty acids C4, C6 and C8, not significantly related to αs1-CN genotype, occurred in milk contained “weak” alleles