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To investigate the relationship between muscle fiber characteristics and meat quality traits by age of Korean native black goat (KNBG), four muscles ( longissimus dorsi , LD; psoas major , PM; semimembranosus , SM; gluteus medius , GM) were obtained from five adult goat (AG; 18 months old) and five young goat (YG; 9 months old). PM muscle had the highest fiber number percentage (FNP) and fiber area percentage (FAP) of type I, followed by SM, GM, and LD muscles. FNP and FAP of type IIB were significantly (p&lt;0.001) higher in AG than those in YG. YG had higher L* values but lower b* values than AG. The highest L* and b* values were observed in LD muscle (p&lt;0.001). Age and muscle type had detrimental (p&lt;0.001) effect on shear force and collagen content for all muscle in AG as compared to YG. YG had significantly (p&lt;0.001) higher myofibrillar fragmentation index (MFI) than AG for all four muscles. These results suggest that muscle fiber compositions of different muscle types of KNBG depend on age, resulting in variations of meat color, MFI, collagen content, and shear force.

Differences in Muscle Fiber Characteristics and Meat Quality by Muscle Type and Age of Korean Native Black Goat