Özet:

The objective of the present work was to investigate how grass feeding in cattle influences the fatty acid (FA) composition in marrow tissue. For a split plot designed experiment, marrow was obtained from the femur, humerus, radius and tibia of four crossbred steers slaughtered at 28 mo of age and fed o n mixture of cool season grasses and legumes. There were no bone type by location within bone interactions (P > 0.42), and the only within bone effect was for trans-vaccenic acid (TVA) where values for medial bone were lowest (P = 0.03) and highest for distal and proximal bone. Total monounsaturated FA and desaturation index were lower (P = 0.01) and total saturated FA were greater (P = 0.01) for proximal vs. distal bone marrow lipids. Marrow conjugated linoleic acid (CLA) was greater (P = 0.02) for distal bones (1.32 %) than for proximal bones (0.86 %). Overall, proportions of 18:3 n-3, CLA, and TVA were 0.60 %, 1.09 % and 2.50 %, respectively. We conclude that the FA profile of marrow in grass-fed cattle represents a healthy, nonatherogenic, animal-based fat source.

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