A trial was conducted to evaluate t

A trial was conducted to evaluate the influence of myodegeneration of pectoralis major muscle on quality traits and chemical composition of breast meat of heavy-size male broilers. For this purpose, a total of 72 pectoralis major muscles were randomly collected from broilers farmed under homogeneous conditions and graded into three categories (mild, n = 22; moderate, n = 33; and severe, n = 17) based on the presence of abnormal fibers (giant fibers, fibers with hyaline degeneration, and damaged and/or necrotic fibers) evaluated by histological and immunohistochemical analysis. Color, pH, drip loss, Allo–Kramer shear values, and chemical composition (moisture, proteins, total lipids, ashes, and collagen) were determined on nonmarinated breast meat. Purge loss and cook loss, total yield, and Allo–Kramer shear values were measured on vacuum-tumbled samples. Samples showing moderate myodegeneration had the highest mean cross-sectional area of the fibers, while samples with severe myodegeneration had myofibers of different diameter and without the characteristic polygonal shape, multifocal degeneration and necrosis, as well as infiltration of CD3-immunoreactive cells.

Results (English) 3:

研究了胸大肌肌变性对肉鸡胸肉品质和化学成分的影响。为此，我们从均匀饲养的肉鸡中随机采集了72块胸大肌，根据是否存在异常纤维（巨大纤维、透明变性纤维、透明变性纤维和透明变性纤维）分为三类（轻度，n=22；中度，n=33；重度，n=17），以及受损和/或坏死纤维）通过组织学和免疫组化分析进行评估。对未加盐的胸肉进行颜色、pH值、滴水损失、Allo-Kramer剪切值和化学成分（水分、蛋白质、总脂质、灰分和胶原蛋白）的测定。在真空旋转样品上测量了吹扫损失、蒸煮损失、总收率和Allo-Kramer剪切值。中等程度的肌变性标本的纤维平均横截面积最大，而严重的肌变性标本的纤维直径不同，没有特征性的多角形、多灶性变性坏死和CD3免疫反应细胞浸润。