Intramuscular fat in the longissimus muscle is reduced in lambs from sires selected for leanness

L. Pannier; D.W. Pethick; G.H. Geesink; A.J. Ball; R.H. Jacob; G.E. Gardner

doi:10.1016/j.meatsci.2013.06.014

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Intramuscular fat in the longissimus muscle is reduced in lambs from sires selected for leanness

Journal article

Open access

Peer reviewed

Intramuscular fat in the longissimus muscle is reduced in lambs from sires selected for leanness

L. Pannier, D.W. Pethick, G.H. Geesink, A.J. Ball, R.H. Jacob and G.E. Gardner

Meat Science, Vol.96(2), pp.1068-1075

2014

DOI: https://doi.org/10.1016/j.meatsci.2013.06.014

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Abstract

Selection for lean growth through Australian Sheep Breeding Values (ASBVs) for post weaning weight (PWWT), eye muscle depth (PEMD) and c-site fat depth (PFAT) raises concerns regarding declining intramuscular fat (IMF) levels. Reducing PFAT decreased IMF by 0.84% for Terminal sired lambs. PEMD decreased IMF by 0.18% across all sire types. Female lambs had higher IMF levels and this was unexplained by total carcass fatness. The negative phenotypic association between measures of muscling (shortloin muscle weight, eye muscle area) and IMF, and positive association between fatness and IMF, was consistent with other literature. Hot carcass weight increased IMF by 2.08% between 12 and 40 kg, reflective of development of IMF as lambs approach maturity. Selection objectives with low PFAT sires will reduce IMF, however the lower impact of PEMD and absence of a PWWT effect, will enable continued selection for lean growth without influencing IMF. Alternatively, the negative impact of PFAT could be off-set by inclusion of an IMF ASBV.

Details

Title: Intramuscular fat in the longissimus muscle is reduced in lambs from sires selected for leanness
Authors/Creators: L. Pannier (Author/Creator)
D.W. Pethick (Author/Creator)
G.H. Geesink (Author/Creator)
A.J. Ball (Author/Creator)
R.H. Jacob (Author/Creator)
G.E. Gardner (Author/Creator)
Publication Details: Meat Science, Vol.96(2), pp.1068-1075
Publisher: Elsevier BV
Identifiers: 991005545460207891
Murdoch Affiliation: School of Veterinary and Life Sciences
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.51 Dairy & Animal Sciences; 3.51.206 Meat Quality
Web Of Science research areas: Food Science & Technology
ESI research areas: Agricultural Sciences