Association of carcass weight with quality and functional properties of beef from Hanwoo steers

The association of carcass weight with quality and functional properties of Hanwoo (Korean native cattle) beef was investigated. The carcasses of 250 Hanwoo steers were categorised into light (<375 kg; n = 74), medium (375-425 kg; n = 76) and heavy (>425 kg; n = 100) groups and were evaluated for back fat thickness, rib eye area, and beef marbling score 24 h postmortem using the Korean carcass grading system. Rib eye area, back fat thickness, and marbling score significantly increased (P < 0.05) with increasing carcass weight. However, marbling score and intramuscular fat content showed only a little increase (P < 0.05) beyond a limit of 375 kg. Inosine-5-monophosphate concentration was significantly higher (P < 0.05) in medium and heavy carcasses. Carnosine concentration was significantly higher in medium carcasses. Total saturated fatty acid content and n-6:n-3 ratio decreased as carcass weight increased (P < 0.05). Medium and heavy carcasses had significantly higher (P < 0.05) scores for sensory quality parameters. Overall, medium carcasses of Hanwoo displayed optimal sensory and health benefits while minimising the economic disadvantages of growing cattle to heavier weights.