School of Agriculture and Environment, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand.
Greenlea Premier Meats Ltd., P.O. Box 87, Hamilton 3240, New Zealand.
Meat Sci. 2022 Aug;190:108840. doi: 10.1016/j.meatsci.2022.108840. Epub 2022 Apr 30.
Meat quality of beef-cross-dairy cattle born in the dairy industry and finished on hill-country pastures is not well characterised. This experiment aimed to objectively evaluate meat quality traits of 15 Angus and 18 Hereford sires via progeny testing of their 326 beef-cross-dairy offspring, and to compare the intramuscular fat (IMF) percentage with the AUS-MEAT marble scores. Beef-breed sires had similar and overall good objective meat quality characteristics. Ultimate pH was not affected by sire (P > 0.05). The differences among sires in meat quality (fat yellowness b*, meat redness a*, yellowness b* and chroma C*, cook loss and shear force, P < 0.05) were small and all values were within the normal range for beef. Marble scores could capture the variation of IMF at marbling score 1-3, but was not effective to distinguish between 0 and 1. In conclusion, the effect of sire on the meat quality of the beef-cross-dairy progeny in this study was of minor importance.
肉牛杂交奶牛在乳业生产中的肉质特征尚未得到充分描述。本试验旨在通过对 326 头安格斯和赫里福德公牛的后代进行后裔测定，客观评价 15 头安格斯和 18 头赫里福德公牛的肉质特性，并比较肌肉内脂肪（IMF）百分比与 AUS-MEAT 大理石评分。肉牛品种的公牛具有相似且总体良好的客观肉质特征。终极 pH 值不受公牛影响（P＞0.05）。在肉质方面，不同公牛之间的差异（脂肪黄度 b*、肉红色 a*、黄度 b和色值 C、蒸煮损失和剪切力，P＜0.05）较小，所有值均在牛肉正常范围内。大理石评分可以捕捉到大理石评分 1-3 时 IMF 的变化，但在 0 和 1 之间区分效果不佳。总之，在本研究中，公牛对肉牛杂交后代肉质的影响并不重要。
