牛肉的颜色和柔软性对使用增长促进技术的添加组合的生产系统的反应
Megan J Webb1,2, Janna J Block1, John R Jaeger3
1Department of Animal Science, South Dakota State University, Brookings, SD 57007, USA.
Translational animal science
|August 16, 2023
概括
使用增长促进技术的牛肉生产系统会影响肉质. 技术的有限使用导致更多的脂肪,更少的水分,增加牛肉条腰部的柔软性.
科学领域:
- 动物科学动物科学
- 食品科学 食品科学 食品科学
- 肉类科学 肉科学
背景情况:
- 促进增长的技术被广泛用于牛肉生产,以提高效率.
- 对于生产者和消费者来说,了解它们对肉质的影响至关重要.
- 本研究研究了技术的添加组合及其对牛肉质量属性的影响.
研究的目的:
- 为了比较牛肉生产系统与不同水平的增长促进技术对肉质的影响.
- 评估无技术 (NT),抗生素 (ANT),植入物 (IMP) 和β-激动剂 (BA) 对牛肉特性的影响.
主要方法:
- 120只牛犊被分配到四个治疗组:NT,ANT,IMP和BA.
- 肌肉活检样本通过实时RT-PCR分析基因表达 (calpain-1,calpain-2,calpastatin).
- 客观颜色 (L*,a*,b*),原油脂肪,水分,损失和华纳-布拉茨勒切削力 (WBSF) 在脱皮牛排上进行了评估.
主要成果:
- 生产系统显著影响了颜色 (L*,a*,b*),NT和IMP的L*值更高,NT/IMP的a*和b*比ANT/BA更高.
- 与IMP和BA相比,NT和ANT处理产生了比IMP和BA更高的原油脂肪和更低的水分的牛排.
- 非植入牛 (NT和ANT) 的牛排比植入牛 (IMP和BA) 更柔软 (WBSF较低),损耗较小.
- 在ANT和BA治疗中,calpastatin表达增加.
结论:
- 在有限使用增长促进技术 (NT,ANT) 的牛肉生产系统中,可以生产具有理想特征的条形腰部:较高的原油脂肪,较低的水分,减少损失和提高柔软度.
- 技术的结合,特别是植入物和β-激动剂,对柔软性产生了负面影响,颜色和脂肪含量发生了变化.
- 基因表达分析表明,技术使用与肉类柔软机制之间存在潜在联系.
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