Fatty acid composition of milk of Tsigai and Karakachan sheep and meat of their lambs F1 crossbreeds of Awassi

摘要

The aim of the present investigation was to study the fatty acid composition of milk fat of Tsigai and Karakachan sheep and meat from their lambs of F1 crossbreeds of Awassi. The study was conducted with two groups of 6 sheep with male lambs in Tsigaiand Karakachan herds. The main milk chemical composition and lamb meat was reported (m. Longissimus, Dorzi). The fatty acid composition of milk and lamb meat was evaluated.Saturated fatty acids in milk of Tsigai and Karakachan sheep are with short and medium chain length ranging from 68.06% to 69.72% with a myristic acid content of 9.10 and 8.58%, respectively. There is a high palmitic acid content C16: 0, which is a partof the saturated fatty acids in meat with a longchain, while myristic acid content is lower (C14: 0).The total amount of polyunsaturated fatty acids in the studied milk of both sheep breeds is relatively low and with close concentrations (4.24 - 4.0%).The choleric type in Karakachan lambs contributes to an increased content of arachidonic acid (C4:0) in Karakachan lamb meat. PUFAs/SFA ratio (0.06-0.058) had low values of, while in the meat these ratio values were higher (1.20-1.27%).Monounsaturated fatty acids in the meat, mainly represented by oleic acid (C18: 1), ranged from 21.92% to 25.32% in both breeds.The atherogenic index of milk fat in both breeds is in the range of 0.90 and 0.87, while in lamb it is lower 0.78 - 0.70.Short-chain fatty acids (oC4: 0-C11: 0) are closely related in the two sheep breeds. Medium-chain acids (C C17iso-C25: 0) have an increased concentration in the milk of Karakachan sheep, and vice versa, for the long-chained ones their content is higher in Tsigai sheep.