Predicting beef-longissimus tenderness from various biochemical and histological muscle traits.
作者： G. Whipple , M. Koohmaraie , M. E. Dikeman , J. D. Crouse
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摘要: Our objective was to determine the predictive value of various biochemical and histological traits for tenderness longissimus muscle. Data collected from 27 crossbred cattle included pH, temperature, sarcomere length, total percentage soluble collagen, muscle-fiber type area, cathepsin B + L activities, calcium-dependent protease (CDP)-I, -II inhibitor myofibril fragmentation indices (MFI), Warner-Bratzler shear (WBS) force, sensory-panel (SPT) ratings carcass traits. Stepwise regression analyses were performed among breeds or pooled within with WBS SPT as dependent variables. When MFI in analysis, at d 7 explained 50% variation 14. An additional 19% accounted by addition CDP 1 activity percentage-area alpha R fibers model. However, because not significant breed subclasses could be classified more a variable, it removed This resulted explaining 44% Also, beta fibers, 6 h pH 14 appeared In addition, only variable groups. These data suggest that used single predictor muscle tenderness; however, (a biological event) also may useful predicting tenderness.
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