Effects of Age on Quality of Beef from Qinchuan Cattle Carcass

Agricultural Sciences in China Pub Date : 2011-11-01 DOI:10.1016/S1671-2927(11)60176-4

Lin-qiang LI , Wan-qiang TIAN , Lin-sen ZAN

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引用次数: 14

Abstract

Qinchuan cattle are one of the top breeds in China. In the current study, cattle of different ages were used to investigate the effect of age on beef quality. With increasing age, shear force, protein content, hydroxyproline (Hyp) content, redness (a*), and muscle fiber diameter and density significantly increased (P<0.05). On the other hand, cooking loss, water content, lightness (L*), and muscle fiber gap markedly decreased (P<0.05). No significant differences were found in the contents of intramuscular fat, ash, amino acids (AA), mineral elements, and expression level of leptin and FAS (P>0.05). The C16:0 and C18:0 content increased significantly (P<0.05), in contrast to that of C18:1 and C18:2 (P<0.05). COLA1 mRNA was expressed at low levels at mon 3 and 9 but markedly increased at mon 12 and 15 (P<0.05). Taken together, these observations demonstrate excellent nutritional values of beef from cattle of different ages concordant with their chemical properties; on the other hand, their commercial value correlates more closely with their physical and sensory characteristics.

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年龄对秦川牛胴体牛肉品质的影响

摘要秦川牛是中国顶级牛种之一。本研究采用不同日龄的牛，研究日龄对牛肉品质的影响。随着年龄的增加，剪切力、蛋白质含量、羟脯氨酸(Hyp)含量、红度(a*)、肌纤维直径和密度显著增加(P<0.05)。蒸煮损失、含水量、亮度(L*)和肌纤维间隙显著降低(P<0.05)。肌内脂肪、灰分、氨基酸(AA)、矿质元素含量、瘦素和FAS表达量均无显著差异(P>0.05)。C16:0和C18:0含量显著高于C18:1和C18:2 (P<0.05)。COLA1 mRNA在第3、9个月低表达，在第12、15个月显著升高(p < 0.05)。综上所述，这些观察结果表明，来自不同年龄的牛的牛肉具有优异的营养价值，与其化学性质相一致;另一方面，它们的商业价值与它们的物理和感官特征密切相关。

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来源期刊

Agricultural Sciences in China AGRICULTURE, MULTIDISCIPLINARY-

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3.2 months