Meat quality of Nguni, Bonsmara and Aberdeen Angus steers raised on natural pasture in the Eastern Cape, South Africa

The current study compared meat quality of Nguni, Bonsmara and Angus steers raised on natural pasture. Fifteen seven-month-old weaners of each breed were kept at the University of Fort Hare Farm for 12 months till slaughter. Monthly weights of the steers were recorded. Carcasses were electrically st...

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Bibliographic Details
Published in:Meat science 2008-05, Vol.79 (1), p.20-28
Main Authors: Muchenje, V., Dzama, K., Chimonyo, M., Raats, J.G., Strydom, P.E.
Format: Article
Language:English
Subjects:
age at slaughter
Angus
beef carcasses
beef cattle
beef quality
Biological and medical sciences
Bonsmara
breed differences
carcass weight
carcass yield
cattle breeds
color
dressing percentage
drip loss
electrical treatment
feed conversion
Food industries
Fundamental and applied biological sciences. Psychology
grazing
longissimus dorsi
Meat and meat product industries
Meat quality
Natural meat
Natural pasture
Nguni cattle
pastures
rearing
rigor mortis
sarcomeres
shear strength
shear stress
slaughter weight
steers
texture
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Summary:The current study compared meat quality of Nguni, Bonsmara and Angus steers raised on natural pasture. Fifteen seven-month-old weaners of each breed were kept at the University of Fort Hare Farm for 12 months till slaughter. Monthly weights of the steers were recorded. Carcasses were electrically stimulated. The m. longissimus thoracis et lumborum was sampled for the measurement of meat colour, pH, drip loss, sarcomere length, myofibrillar fragmentation length and Warner Bratzler (WB) shear force. The Nguni had the highest ( P < 0.05) average daily gain. Bonsmara and Angus steers had higher ( P < 0.05) carcass weight and dressing percentage than the Nguni steers. Meat quality characteristics were similar among all the breeds except that Nguni meat was darker ( L ∗) ( P < 0.05) than meat from the other two breeds. The respective L ∗ values for Nguni, Bonsmara and Angus steers were 36.5, 38.6 and 39.9. There were significant ( P < 0.05) correlations among some meat quality traits. There were significant ( P < 0.05) correlations between WB values of meat aged for 2 and 21 days in Nguni and Bonsmara, but not in Angus. Meat quality from Nguni compares favourably with that from established breeds, when raised on natural pasture.
ISSN:0309-1740
1873-4138
DOI:10.1016/j.meatsci.2007.07.026