Luo Lingying, Guo Dandan, Zhou Guanghong, Chen Kunjie
1Key Laboratory of Meat Processing, MOA; Key Laboratory of Meat Processing and Quality Control, MOE; Jiangsu Innovation Center of Meat Production and Processing, Nanjing Agricultural University, Nanjing, 210095 People's Republic of China.
2College of Engineering, Nanjing Agricultural University, 40 Dianjiangtai Road, Pukou District, Nanjing, 210031 People's Republic of China.
J Food Sci Technol. 2018 Apr;55(4):1569-1574. doi: 10.1007/s13197-018-3038-9. Epub 2018 Jan 27.
Researchers nowadays have paid much attention to the relationships between tenderness and marbling, or physiological age. While the marbling was mainly evaluated qualitatively with scores or grades, and rarely related with physiological age. Present study was carried out to analyze the marbling features of muscle between the 12th and 13th ribs from 18, 36, 54 and 72 months old Simmental steers were quantitatively described with area and perimeter using computer vision technique. Relationship between Warner-Bratzler Shear force (WBSF), physiological age and the marbling features were examined performing regression analysis. The results revealed that WBSF positively correlated with physiological age, but negatively with marbling area and perimeter. Regression analysis showed that the relationship between the shear force and the steers' age was more close to the quadratic curve (R = 0.996) and exponential curve (R = 0.957). It was observed during study that marbling grew with steers age. Marbling features were in linear correlation with the steers' age, with R = 0.927 for marbling area and R = 0.935 for marbling perimeter. The industries in future may speculate beef tenderness and physiological age based on the marbling features (area and perimeter), which can be determined through the online image acquisition system and image processing.
如今，研究人员十分关注嫩度与大理石花纹或生理年龄之间的关系。虽然大理石花纹主要通过评分或等级进行定性评估，且很少与生理年龄相关。本研究旨在分析18、36、54和72月龄西门塔尔阉牛第12和13肋骨间肌肉的大理石花纹特征，使用计算机视觉技术通过面积和周长进行定量描述。通过回归分析研究了沃纳 - 布拉茨勒剪切力（WBSF）、生理年龄与大理石花纹特征之间的关系。结果显示，WBSF与生理年龄呈正相关，但与大理石花纹面积和周长呈负相关。回归分析表明，剪切力与阉牛年龄之间的关系更接近二次曲线（R = 0.996）和指数曲线（R = 0.957）。研究过程中观察到，大理石花纹随阉牛年龄增长。大理石花纹特征与阉牛年龄呈线性相关，大理石花纹面积的R = 0.927，大理石花纹周长的R = 0.935。未来的行业可以基于大理石花纹特征（面积和周长）推测牛肉嫩度和生理年龄，这些特征可通过在线图像采集系统和图像处理来确定。
