The impact of different Hormonal Growth Promotants (HGP) on desmin degradation and collagen content of various muscles from pasture and feedlot finished steer carcasses

Author(s)
Packer, D T
Geesink, G H
Thompson, J M
Polkinghorne, R J
Ball, A B
McGilchrist, P
Publication Date
2021-12
Abstract
<p>The impacts of several hormonal growth promotants (HGP) on Warner-Bratzler Shear Force (WBSF), desmin degradation ratio (DDR) and collagen content (COLL) were assessed. Treatments within feedlot and pasture finished steer carcasses (<i>n</i> = 60, <i>n</i> = 40, respectively) were control (CON-100-F and CON-400-P), oestradiol HGPs (OES-100-F and OES-400-P) and trenbolone acetate/oestradiol HGPs (TBA+OES-100-F only). The <i>longissimus lumborum</i> (LL), <i>gluteus medius</i> (GM), <i>infraspinatus</i> (IS), <i>semitendinosus</i> (ST,) and the LL and <i>biceps femoris</i> (BF) were collected from feedlot and pasture finished steers, respectively. All muscles were aged between 3 and 35 days. The LL from TBA+OES-100-F carcasses had increased WBSF and decreased DDR, which varied in magnitude with ageing (<i>P</i> < 0.05). The GM from OES-100-F steers also had lower DDR (P < 0.05). The feedlot HGP treatments had no impact on the WBSF of the IS, ST or GM and no impact on COLL in the LL. The OES-400-P had no impact on WBSF, DDRor COLL for both muscles (<i>P</i> > 0.05).</p>
Citation
Meat Science, v.182, p. 1-8
ISSN
1873-4138
0309-1740
Pubmed ID
34352620
Link
Publisher
Elsevier BV
Title
The impact of different Hormonal Growth Promotants (HGP) on desmin degradation and collagen content of various muscles from pasture and feedlot finished steer carcasses
Type of document
Journal Article
Entity Type
Publication

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