期刊
MEAT SCIENCE
卷 172, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.meatsci.2020.108342
关键词
Barley; Beef; NIRS; PLS-DA; Support vector machine
资金
- Saskatchewan Barley Development Commission (Saskatoon, SK, Canada)
- Dupont Pioneer (Johnston, IA, USA)
- Saskatchewan Cattleman's Association
- Saskatchewan Ministry of Agriculture
- Canada-Saskatchewan Growing Forward 2
This study evaluated the use of Vis-NIRS to authenticate barley-finished beef and found that it can effectively distinguish between beef from barley and corn-fed cattle. The dietary grain source did not significantly affect meat quality, but did impact fatty acid profiles. The combination of Vis-NIRS with PLS-DA and SVM showed promising results in classifying different types of beef samples.
This study evaluated visible and near-infrared spectroscopy (Vis-NIRS) to authenticate barley-finished beef using different discrimination approaches. Dietary grain source (barley, corn, or blend-50% barley/50% corn) did not affect (P > 0.05) meat quality but influenced (P < 0.05) fatty acid profiles. The longissimus thoracis (LT) from barley-fed steers had lower n-6 fatty acid content and n-6/n-3 ratio compared to LT from corn and blended grain-fed steers. Vis-NIRS coupled with partial least square discriminant analysis (PLS-DA) and support vector machine in the linear (L-SVM) kernel classified with approximately 70% overall accuracy subcutaneous fat and intact LT samples, respectively, from barley, corn, and blended-fed cattle. When only barley and corn samples were considered, fat and intact LT samples were correctly classified with overall accuracy >94% with PLS-DA and radial/L-SVM, and approximately 90% with PLS-DA and L-SVM, respectively. Ground LT samples were classified with <= 70% overall accuracy. Vis-NIRS measurements on fat and intact LT have potential to discriminate between corn and barley-fed beef.
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