Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/28951
Title: Selection for increased muscling in Angus cattle did not increase the glycolytic potential or negatively impact pH decline, retail colour stability or mineral content
Contributor(s): McGilchrist, P  (author)orcid ; Greenwood, P L (author); Pethick, D W (author); Gardner, G E (author)
Publication Date: 2016-04
DOI: 10.1016/j.meatsci.2015.12.007
Handle Link: https://hdl.handle.net/1959.11/28951
Abstract: This study determined the impact of selection for greater muscling in Angus cattle on myofibre characteristics, muscle enzymatics, retail colour stability, pH decline and mineral content of the semimembranosus (SM), semitendinosus (ST) and longissimus thoracis (LT). Muscle from 10 low muscled (low) and 11 high muscled (high) steers were analysed. The high steers had myofibres 22% and 24% larger in cross-sectional area in the SM and ST (P < 0.05), and 8.6% less type IIX myofibres in the LT than the low steers (P < 0.05). The highs had 4.9% lower lactate dehydrogenase activity, 10.2% and 12.3% higher citrate synthase and isocitrate dehydrogenase activity than lows (P < 0.05). The highs had 27% more iron in the LT (P < 0.05). The results indicate that the oxidative capacity of muscle can be maintained in more muscular cattle with no detrimental effects to mineral content, pH decline or retail colour stability. Myofibre hypertrophy is one mechanism leading to greater muscle mass of these high muscled cattle.
Publication Type: Journal Article
Source of Publication: Meat Science, v.114, p. 8-17
Publisher: Elsevier BV
Place of Publication: Netherlands
ISSN: 1873-4138
0309-1740
Fields of Research (FoR) 2008: 070203 Animal Management
Fields of Research (FoR) 2020: 300302 Animal management
Socio-Economic Objective (SEO) 2008: 830599 Primary Animal Products not elsewhere classified
830301 Beef Cattle
Socio-Economic Objective (SEO) 2020: 100401 Beef cattle
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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