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Total number of myogenin+ nuclei measured across the entire cross-sectional area (A) and ratio of myogenin+ nuclei over total nuclei numbers (B) in the pectoral (Pec) and gastrocnemius (Gas) muscles of layer and broiler chicks aged embryonic day (ED) 18. Results are presented as means±S.E.M. (n=4 animals per strain per day); 3 asterisks represent significant differences at P<0.0001 between strains on ED18.
