Incidence of broiler breast myopathies at 2 different ages and its impact on selected raw meat quality parameters
Incidence of broiler breast myopathies at 2 different ages and its impact on selected raw meat quality parameters
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DOI：
10.3382/ps/pex072
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发表时间：
2017-08-01
期刊：
影响因子：
4.4
通讯作者：
Vazquez-Anon, M.
中科院分区：
文献类型：
--
作者：
Kuttappan, V. A.;Owens, C. M.;Vazquez-Anon, M.
白色条纹（WS）和木质胸肉（WB）是影响生鸡胸肉接受度以及熟制和深加工产品性能的2种禽肉质量缺陷。本研究旨在评估这些条件在不同年龄的肉鸡的发病率，并比较不同程度的WS和WB的鱼片的性能。在这项研究中，在标准的商业在线处理系统中处理了1,920只6周龄和9周龄的鸡。冷却后，将尸体去骨，收集蝴蝶片并称重。对单个鱼片的正常、中度、重度和极重度WS和WB以及点状出血性病变（PHEM，0 -无病变至2 -重度病变）进行评分。选择具有NORM-WS/WB、SEV-WS、SEV-WB和SEV-WS/WB的代表性鱼片并在4 ℃下储存。24小时后，鱼片长度，宽度，颅高，尾高，以及pH值，颜色和滴水损失记录。与6周龄相比，9周龄时重度和极重度WS和WB的发生率增加。鱼片重量和肌病之间的关系在9周龄时达到平台，鱼片越多，得分越高。在第6周和第9周，SEV-WS、SEV-WB和SEV-WS/WB中的平均PHEM评分均高于NORM-WS/WB鸟类（P < 0.05）。与SEV-WS/WB相比，NORM-WS/WB禽类具有较低（P < 0.05）的活重和乳房重量、乳房产率、头部和尾部高度以及B* 值（黄度）。与SEV-WB和SEV-WS/WB相比，NORM-WS/WB具有较低（P <0.05）的pH，而NORM-WS/WB和SEV-WS样品显示较低（P < 0.05）的滴水损失。本研究结果显示，严重程度的WS和WB与较重和较老的鸟，和较厚的胸鱼片。严重程度的WS和/或WB的发生可以影响各种生肉品质因素，主要是颜色和持水力。
White striping (WS) and woody breast (WB) are 2 poultry meat quality defects that affect the acceptance of raw breast fillets as well as properties of cooked and further processed products. The present study was intended to evaluate the incidence of these conditions in broilers at different ages and to compare the properties of fillets with different degrees of WS and WB. For this study, 1,920 birds were processed, at 6 and 9 wk of age, in a standard commercial inline processing system. After chilling, carcasses were deboned and butterfly fillets were collected and weighed. Individual fillets were scored for normal, moderate, severe, and very severe degrees of WS and WB, and for petechial hemorrhagic lesions (PHEM, 0 - no lesion to 2 - severe lesion). Representative fillets with NORM-WS/WB, SEV-WS, SEV-WB, and SEV-WS/WB were selected and stored at 4 degrees C. After 24 h, fillet length, width, cranial height, and caudal height, as well as pH, color, and drip loss were recorded. There was an increase in incidence of severe and very severe WS and WB conditions at 9 wk compared to 6 wk of age. The relationship between fillet weight and the myopathies plateaued at 9 wk of age with more fillets showing a higher score. Mean PHEM scores were higher (P < 0.05) in SEV-WS, SEV-WB, and SEV-WS/WB compared to NORM-WS/WB birds, both at 6 and 9 weeks. NORM-WS/WB birds had lower (P < 0.05) live and breast weight, breast yield, and cranial and caudal heights, as well as b* value (yellowness) compared to SEV-WS/WB. NORM-WS/WB had lower (P < 0.05) pH while NORM-WS/WB and SEV-WS samples showed lower (P < 0.05) drip loss when compared to SEV-WB and SEV-WS/WB. The results from this study showed that the severe degrees of WS and WB are associated with heavier and older birds, and thicker breast fillets. Occurrence of severe degrees of WS and/or WB can affect various raw meat quality factors, mainly color and water holding capacity.