The influence of breed and mh-genotype on carcass conformation, meat physico-chemical characteristics, and the fatty acid profile of muscle from yearling bulls

被引:60
作者
Aldai, N
Murray, BE
Oliván, M
Martínez, A
Troy, DJ
Osoro, K
Nájera, AI
机构
[1] SERIDA, Villaviciosa 33300, Asturias, Spain
[2] TEAGASC, Natl Food Ctr, Dublin 15, Ireland
[3] Univ Basque Country, Fac Farm, Area Tecnol Alimentos, Vitoria 01006, Spain
关键词
beef; breed; genotype; muscular hypertrophy; carcass quality; meat quality; colour; fatty acids;
D O I
10.1016/j.meatsci.2005.08.016
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
The influence of breed and mh-genotype on carcass conformation, meat physico-chemical characteristics and the fatty acid profile of muscle were studied. Samples from 16 yearling bulls from '' Asturiana de los Valles '' (AV, n - 12) and '' Asturiana de la Montana '' (AM, n = 4) were collected. AV animals were classified into three groups according to the presence of the gene causing double-museling (AV double-muscled (mh/mh), n = 4, AV heterozygous (mh/+), n = 4. AV normal (+/+). n - 4). Double-muscled animals displayed better carcass traits, lower total fat (comprised of subcutaneous (SC), intermuscular (IT) and intramuscular (IM) deposits), higher lean, moisture and drip loss, and lighter meat than AV normal animals. Heterozygous animals showed intermediate characteristics, AM animals, being a more rustic and smaller breed, showed lower conformation, higher total fat (SC, IT and IM), lower moisture and darker meat. According to the intramuscular fatty acid profile, mh/mh animals showed a lower proportion of SFA and MUFA, and a higher proportion of PUFA with an equal proportion of CLA in total fatty acid content. The P/S ratio increased with increasing number of mh alleles (or double-muscling character), while no differences between animal groups were found for the it 6/n 3 ratio, (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:486 / 495
页数:10
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