Effects of Dietary Guanidinoacetic Acid on Growth Performance,Meat Quality,Antioxidant Activity,and Antioxidant-related Gene Expression in Ducks

摘要

This study aimed to investigate the effects of dietary guanidinoacetic acid on growth performance,meat quality,antioxidant activity,and antioxidant-related gene expression in ducks.Total 480 42-day-old female ducks were randomly divided into four groups with six replicates and 20 ducks per replicate and fed the basal diet to the control group.The experimental groups were fed the basal diet with 400,600 and 800 mg·kg^-1 guanidinoacetic acid,respectively.The trial lasted 48 days.Compared with the control group,（1） the body weight at 90 days and average daily gain were increased （P<0.05）,the feed conservation ratio was decreased （P<0.05）;（2） the dressing percentage and breast muscle percentage were increased （P<0.05）;（3） the total amino acid content,polyunsaturated fatty acids to monounsaturated fatty acids ratio were increased （P<0.05） in breast and thigh muscles;（4） activities of superoxide dismutase,catalase and glutathione peroxidase enzyme were increased （P<0.05） in thigh muscles;（5） the relative expressions of superoxide dismutase 1,glutathione peroxidase 1,and catalase were significantly increased （P<0.05） in the liver.In this study,the optimum dosage of 600 mg·kg^-1 guanidinoacetic acid improved the growth performance,meat quality,antioxidant activity,and antioxidant-related gene expression in ducks.

关键词

guanidinoacetic acid / carcass characteristics / fatty acid / amino acid / antioxidant activity