Heterosis for meat quality and fatty acid profiles in crosses among Bos indicus and Bos taurus finished on pasture or grain

被引：22
|
作者：
Gama, L. T. [1 ]
Bressan, M. C. [2 ,3 ]
Rodrigues, E. C. [3 ]
Rossato, L. V. [3 ]
Moreira, O. C. [4 ]
Alves, S. P. [1 ]
Bessa, R. J. B. [1 ]
机构：
[1] Univ Tecn Lisboa, Fac Med Vet, CIISA, P-1300477 Lisbon, Portugal
[2] Inst Nacl Recursos Biol, P-1649038 Lisbon, Portugal
[3] Univ Fed Lavras, BR-37200000 Lavras, MG, Brazil
[4] Inst Nacl Recursos Biol, P-2005048 Fonte Boa, Vale De Santare, Portugal
来源：
MEAT SCIENCE | 2013年 / 93卷 / 01期
关键词：
Beef cattle; Fatty acids; Finishing system; Heterosis; X ENVIRONMENT INTERACTIONS; STEAROYL-COA DESATURASE; CARCASS TRAITS; BREED DIFFERENCES; LONGISSIMUS MUSCLE; BEEF; GENOTYPE; BRAHMAN; CATTLE; ANGUS;
D O I：
10.1016/j.meatsci.2012.08.005
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
Physicochemical properties and fatty acid profiles of meat from Bos indicus, Bos taurus and crossbred B. taurusx B. indicus bullocks (n = 216), finished on pasture or grain, were used to estimate the effects of heterosis. Meat quality and fatty acid profiles generally benefited with crossbreeding, but the advantages from heterosis differed among finishing systems. The Warner-Bratzler shear-force in fresh and aged meat was reduced due to heterosis in pasture-finishing, but the effect was minor under grain-finishing. With pasture-finishing, heterosis caused an increase of 5% in CLA concentration, but few other changes in fatty acid profiles. In grain-finishing, heterosis caused a reduction in intramuscular fat and cholesterol, increased amounts of PUFA, n-6 fatty acids and PUFA/SFA ratio, and a decline in atherogenic index. The Delta(9) desaturase estimated activity in crossbreds showed a behavior close to B. indicus, suggesting the existence of few loci and a dominance genetic effect on enzymes involved in fatty acid synthesis and metabolism. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：98 / 104
页数：7
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