Beef carcasses in Europe are classified on measures of carcass weight, conformation, and fat cover. These measurements provide the basis for payment to producers, with financial penalties for carcasses that do not conform to desirable characteristics. The objective of the present study was to identify animal-level factors associated with the achievement of a desirable carcass weight, conformation score, fat score, and age at harvest, as stipulated by Irish beef processors in accordance with the EUROP carcass classification system. The stipulated specifications were a EUROP conformation score ≥O=, a carcass weight between 270 and 380 kg, a EUROP fat score between 2+ and 4=, and an age at harvest ≤ 30 mo. In the present study, 59% of cattle failed to achieve at least one of these desired specifications. The logit of the probability of achieving the desired specifications was estimated using multivariable logistic regression and carcass data from 4,717,989 cattle finished and harvested in Ireland between the years 2003 and 2017. In comparison to beef-origin carcasses and after accounting for breed differences, the likelihood of dairy-origin carcasses achieving the desired age, conformation, fat, and weight specifications was 0.97, 0.88, 1.14, and 1.05, respectively. In comparison to heifer carcasses, the odds ratio (OR) of bull and steer carcasses simultaneously achieving all of the desired specifications (i.e. the overall specification) was 0.35 and 0.95, respectively. Additionally, after accounting for breed differences, heifers from the dairy herd were half as likely as heifers from the beef herd to achieve the overall specification, whereas the odds of dairy-origin bulls (OR = 3.46) and steers (OR = 2.41) achieving the overall specification was greater than that of their respective beef-origin counterparts. Finally, cattle with a greater breed proportion of Angus were most likely to achieve the overall specification. Results from the present study could provide a deeper understanding as to why animals fail to achieve desirable carcass specifications and could be implemented into the management decisions made on farm to ensure that the supply of beef carcasses that achieve the desired metrics is maximized.

中文翻译：

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使用EUROP分类系统对与爱尔兰牛肉beef体达到理想规格相关的动物水平因素。

在欧洲，牛肉cas体根据measures体重量，构象和脂肪覆盖率进行分类。这些度量为向生产者付款提供了依据，并对不符合所需特性的屠体处以罚款。本研究的目的是根据爱尔兰牛肉加工者根据EUROP cas体分类系统的要求，确定与达到理想car体重量，构象评分，脂肪评分和收获时年龄相关的动物水平因素。规定的规格为：EUROP构象评分≥O=，a体重量在270至380公斤之间，EUROP脂肪评分在2+至4 =之间，收获年龄≤30 mo。在本研究中，有59％的牛没有达到这些所需规格中的至少一项。使用多变量逻辑回归和and体数据，从2003年至2017年间在爱尔兰完成和收获的4,717,989头牛身上，估算出达到期望规格的概率的对数。与牛肉起源的car体相比，并考虑了品种差异后，可能性达到所需年龄，构象，脂肪和体重指标的乳制品屠体的分别为0.97、0.88、1.14和1.05。与小母牛car体相比，公牛和desired体（体同时达到所有所需规格（即总体规格）的优势比（OR）分别为0.35和0.95。此外，考虑到品种差异后，奶牛场的小母牛达到牛肉总体规格的几率是牛群的小母牛的一半。而奶牛来源公牛（OR = 3.46）和ers牛皮（OR = 2.41）达到总体指标的几率大于其牛肉来源公牛的几率。最后，安格斯犬种比例较高的牛最有可能达到总体规格。本研究的结果可以使人们更深入地了解动物为何无法达到理想的car体规格，并可以在农场做出的管理决策中加以实施，以确保实现理想指标的牛肉car体供应最大化。安格斯犬种比例较高的牛最有可能达到总体规格。本研究的结果可以使人们更深入地了解动物为何无法达到理想的car体规格，并可以在农场做出的管理决策中加以实施，以确保实现理想指标的牛肉car体供应最大化。安格斯犬种比例较高的牛最有可能达到总体规格。本研究的结果可以使人们更深入地了解动物为何无法达到理想的car体规格，并可以在农场做出的管理决策中加以实施，以确保实现理想指标的牛肉car体供应最大化。