Marimuthu J, Loudon Kate M W, Gardner G E
School of Veterinary and Life Sciences, Murdoch University, WA 6150, Australia; Advanced Livestock Measurement Technologies project, Meat and Livestock Australia, NSW 2060, Australia.
School of Veterinary and Life Sciences, Murdoch University, WA 6150, Australia; Advanced Livestock Measurement Technologies project, Meat and Livestock Australia, NSW 2060, Australia.
Meat Sci. 2022 Jun;188:108764. doi: 10.1016/j.meatsci.2022.108764. Epub 2022 Feb 8.
This study compared portable ultra-wide band microwave system (MiS) versus body condition score to predict C-site fat depth, GR tissue depth and eye muscle depth (EMD) in lambs. Experiment 1 assessed MiS and condition score to predict ultrasound measured C-site and EMD (n = 1549). Precision and accuracy was greatest for the MiS measurement with liveweight included in the model, with a C-site predicted RMSEP of 0.58 mm, R 0.60 and bias of 0.021 mm and an EMD predicted RMSEP of 2.27 mm, R 0.72 and bias of 0.088 mm. Experiment 2 (n = 900) assessed pre-slaughter MiS scanning and condition scoring to predict carcase GR tissue depth, C-site fat depth and EMD. MiS performed better than condition score for all three carcase trait predictions, regardless of the inclusion of liveweight, with the highest precision and accuracy for GR tissue depth determination with a RMSEP of 3.68 mm, R 0.63 and bias 0.072 mm.
本研究比较了便携式超宽带微波系统（MiS）与体况评分在预测羔羊C部位脂肪深度、GR组织深度和眼肌深度（EMD）方面的效果。实验1评估了MiS和体况评分对超声测量的C部位和EMD的预测能力（n = 1549）。在模型中纳入体重时，MiS测量的精度和准确性最高，C部位预测的RMSEP为0.58毫米，R为0.60，偏差为0.021毫米；EMD预测的RMSEP为2.27毫米，R为0.72，偏差为0.088毫米。实验2（n = 900）评估了屠宰前MiS扫描和体况评分对胴体GR组织深度、C部位脂肪深度和EMD的预测能力。对于所有三个胴体性状预测，MiS的表现均优于体况评分，无论是否纳入体重，GR组织深度测定的精度和准确性最高，RMSEP为3.68毫米，R为0.63，偏差为0.072毫米。
