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  • Title: Effects of rice feeding and carnitine addition on growth performance and mRNA expression of protein metabolism-related genes in broiler grower chicks.
    Author: Fujimoto H, Matsumoto K, Koseki M, Yamashiro H, Yamada T, Takada R.
    Journal: Anim Sci J; 2020; 91(1):e13390. PubMed ID: 32468653.
    Abstract:
    This study was carried out to evaluate the nutritional effects of rice feeding and carnitine addition to a diet for broiler chicks. Thirty-six male 10-day-old broiler chicks were assigned to one of the following four treatment groups: corn-based diet (corn group), rice-based diet (rice group), and each diet with added carnitine (100 ppm). The experimental period was 2 weeks. Rice feeding resulted in significantly higher growth performance (body weight gain and feed efficiency) compared to corn feeding. Carnitine addition also resulted in higher growth performance. Breast muscle and thigh muscle weight (g) were significantly higher in broiler chicks fed rice and those fed diets with added carnitine. Liver mRNA expression of IGF-I was significantly higher in broiler chicks fed rice compared to those fed corn. There was no significant difference in mRNA expression of muscle atrogin-1 or liver CPT-I between broiler chicks fed rice and those fed corn, not between broilers chicks fed diets containing carnitine or not. Overall, these results show that rice feeding and carnitine addition improve the growth performance of broiler chicks by increasing mRNA expression of liver IGF-I. In addition, carnitine action is not affected by different cereals (corn and rice).
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