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Explanation of Genetic Test Markers

GeneSTAR Quality Grade (QG1, QG2, QG3, QG4)
A DNA genetic marker panel test, which identifies the presence of a major gene, Thyroglobulin, associated with Quality Grade and marbling. QG1: Possible values (0, 1 or 2) QG2: Possible values (0, 1 or 2) QG3: Possible values (0, 1 or 2) QG4: Possible values (0, 1 or 2)

GeneSTAR Tenderness (T1, T2, T3)
This test is based on two naturally occurring genes involved in the post mortem tenderization process: Calpastatin and Calpain. T1: Indicates the value for Calpastatin (possible values 0, 1 or 2) T2: indicates the value for Calpain (possible values 0, 1 or 2) T3: indicates the value for Calpain 4751 or T3 (possible values 0, 1 or 2) (Possible values indicate the number of copies of the favorable form of the gene.)

Total G: this is the total score for the combined GeneSTAR tests; the maximum score is 14 stars.

GPDs
These are a logical, simple calculation used to describe the actual genetic makeup of animals. GPD for T: The numerical value for GeneSTAR Tenderness is reported in lbs of shear force (WBSF). GPD for QG: For Quality Grade markers, a GPDT is reported as the increased likelihood that a carcass will grade Choice or better.

For additional information on the above GeneSTAR tests please click here.