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首页> 外文会议>ICoMST 2011;International conference of meat science and technology >More muscular carcasses have a lower incidence of dark cutting syndrome
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More muscular carcasses have a lower incidence of dark cutting syndrome

机译：肌肉发达的尸体深色切割综合征的发生率较低

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Dark cutting beef costs Australian beef producers around $7.09 per animal graded under Meat Standards Australia (MSA) due to its impact on meat quality. The objective of this experiment was to determine if carcass muscularity as determined by eye muscle area adjusted for carcass weight taken at the time of MSA grading could explain variance in ultimate pH (pH_u) due to an affect on muscle glycogen concentration. MSA beef carcass grading data was obtained from a Western Australian beef processor between February 2002 and December 2008 containing 204,072 carcass records. The effects of muscling on pH_u were analysed using a logit model within a bayesian framework. The model was adjusted for a range of production factors such as loin temperature at time of grading, season, gender, finishing system, tropical breed content and lot size along with phenotypic measures such as eye muscle area (EMA), ossification score, hot standard carcass weight, MSA marbling score and rib fat depth were also included (results not shown). Muscling had a significant impact on pH_u compliance with an increase in eye muscle area of from 40 to 80 cm2, increasing compliance by around 14% (P<0.001). An increase in compliance in more muscular cattle may be the result of increased insulin responsiveness, reduced adrenaline responsiveness and more muscle glycogen in these animals at slaughter. Thus breeding more muscular cattle with an eye muscle area greater than 70 cm~2 may help alleviate the problem of dark cutting beef in Australia.
机译：根据澳大利亚肉类标准（MSA）的分级，深色切块牛肉会使澳大利亚牛肉生产商每只动物的成本大约为7.09澳元，原因是它对肉质的影响。该实验的目的是确定通过对眼部肌肉面积进行调整（根据在MSA分级时采集的car体重量进行调整）的car体肌肉性，是否可以解释由于对肌肉糖原浓度的影响而导致的最终pH值（pH_u）的变化。 MSA牛肉car体分级数据是从2002年2月至2008年12月之间的西澳大利亚州牛肉加工商处获得的，其中包含204,072具cas体记录。使用贝叶斯框架内的logit模型分析了肌肉对pH_u的影响。对该模型进行了调整，以适应一系列生产因素，例如分级时的腰部温度，季节，性别，育种系统，热带品种含量和批量大小以及表型指标（例如眼肌面积（EMA），骨化评分，热标准） included体重量，MSA大理石花纹得分和肋骨脂肪深度也包括在内（结果未显示）。肌肉活动对pH_u依从性有重大影响，眼部肌肉面积从40 cm2增加到80 cm2，依从性提高了约14％（P <0.001）。肌肉发达的牛的顺应性增加可能是这些动物在屠宰时胰岛素反应性增加，肾上腺素反应性降低和肌肉糖原增加的结果。因此，饲养更多具有70 cm〜2眼肌面积的肌肉牛可以缓解澳大利亚的暗切牛肉问题。

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