SHEAR VALUE RANGES BY INSTRON WARNER-BRATZLER AND SINGLE-BLADE ALLO-KRAMER DEVICES THAT CORRESPOND TO SENSORY TENDERNESS

Corresponding sensory and shear values were established for the Instron Warner-Bratzler attachment (I-WB) and the single blade Allo-Kramer device (SB-AK). Test samples were three replications of 24 pectoralis major muscles from each of four deboning times (0, 2, 6, or 24 h). Twenty-four consumer panelists evaluated cooked samples for tenderness at each replication. Coefficients of regression for shear values versus sensory tenderness were R2 = .88 and R2 = .86, respectively, for I-WB and SB-AK. The I-WB values of 3.62 to 6.61 kg and SB-AK values of 8.10 to 14.82 kg corresponded to "moderately tender" to "slightly tender". For the 24-h samples, 94% were < 6.61 kg by I-WB and 96% were < 14.82 kg by SB-AK. Of the 6-h samples, 69% were at or below these values.