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2011-03-01
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Keane, M.G., Relative Tissue Growth Patterns and Carcass Composition in Beef Cattle, End of Project Reports, Teagasc, 2011.
Abstract
The main objective of the beef breed evaluation programme carried out at Grange
Beef Research Centre was to compare the productive characteristics of different beef
breed crosses out of Holstein-Friesian cows. In the course of this work much
additional information was acquired, particularly on growth patterns of body organs
and tissues, and how these affect kill-out proportion and carcass composition. The
data were also used to examine relationships between carcass classification variables
and carcass composition. Cattle used for beef production in Ireland can be classified
into three main biological types: (i) early maturing, (ii) dairy, and (iii) late maturing.
Results from an experiment that compared Friesians (dairy), Hereford × Friesians
(early maturing) and Charolais × Friesians (late maturing) are used to represent these
biological types. The material is organized under the following headings: (i) non
carcass parts and kill-out proportion, (ii) carcass composition, (iii) carcass tissue
distribution, (iv) muscle chemical composition, (v) gender, (vi) dairy breeds, and (vii)
carcass classification and composition.