不同杂交品种肉牛背最长肌纤维组织学结构与嫩度对比研究

摘要

Different crossbreeds of beef cattle from the major beef cattle growing areas in Inner Mongolia, such as Simmental cattle, Charolais cattle, Red Angus cattle in high hybrid and Grassland Red, all at 16 months of age, were raised under the same management conditions for 180 days and used to investigate the effect of different beef cattle crossbreeds on the histological structure and tenderness of longissimus dorsi. The longissimus dorsi in Grassland Red had maximum diameter （48.16 ±2.98）μm, minimum sarcomere length （1.84 ± 0.09） μm, and maximum shear force （7.31 ± 0.46） N among the beef cattle corssbreeds. By contrast, Red Angus cattle revealed minimum longissimus dorsi fiber diameter （37.77 ± 3.21） μm, maximum sarcomere length （2.08 ± 0.09） μm, minimum shear force （5.70 ± 0.74） N, and the best meat tenderness.%选择16个月龄的西门塔尔牛、夏洛莱牛、红安格斯牛品种高代杂种牛以及草原红牛，在相同饲养管理条件下育肥180d后屠宰。研究品种对肉牛背最长肌纤维组织学结构及嫩度的影响。结果表明：草原红牛肌纤维直径最大为（48．16±2．98）μm，肌节长度最短为（1．84±0．09）μm，剪切力值最大为（7．31±0．46）N，背最长肌肌肉嫩度较其他品种差；红安格斯牛肌纤维直径最小为（37．77±3．21）μm，肌纤维肌节长度最长为（2．08±0．09）μm，剪切力值最小（5．70±0．74）N，背最长肌肌肉嫩度较其他品种好。