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A comparative study on protein-sparing effects among juvenile Erythroculter ilishaeformis line, Ancherythroculter nigrocauda line and their hybrid F-1 fed diets with different protein to carbohydrate ratios

文献类型： 外文期刊

作者： Tian, Juan 1 ; Peng, Di 2 ; Wen, Hua 2 ; Wang, Guiying 1 ; Li, Pei 1 ; Chen, Jian 1 ; Sun, Yanhong 1 ; Lu, Xing 2 ; Wu, Fan; 1 ;

作者机构： 1.Wuhan Acad Agr Sci, Fisheries Res Inst, Wuhan 430207, Hubei, Peoples R China

2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan, Hubei, Peoples R China

3.Wuhan Xianfeng Aquaculture Technol Co Ltd, Wuhan, Peoples R China

关键词： Akt; TOR; hybrid culter; parent lines; protein-sparing effects

期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）

ISSN： 1353-5773

年卷期：

页码：

收录情况： SCI

摘要： To investigate the mechanism underlying the difference of dietary protein requirements among Erythroculter ilishaeformis line, Ancherythroculter nigrocauda line and their hybrid F-1 (E. ilishaeformis female xA. nigrocauda male), juvenile fish of these three species with initial body weight (5.86 +/- 0.10 g) were fed the six isoenergy diets with different dietary protein/carbohydrate ratios (P/C ratios were 0.56, 0.78, 1.11, 1.61, 2.52 and 4.43, respectively) for 8 weeks. The results showed that the hybrid culter had the higher weight gain rate (WGR), protein efficiency ratio and protein deposition ratio compared with its parents lines; using WGR as a response criteria, the dietary carbohydrate tolerant level of juvenile E. ilishaeformis line, A. nigrocauda line and their hybrid was 24.3%, 28.5% and 29.7%, respectively, and the optimal P/C ratio was 1.69, 1.35, 1.22 and respectively. Dietary carbohydrate activated hepatic protein kinase B (Akt), dietary protein activated hepatic target of rapamycin (TOR) and the induction of mRNA expression of hepatic phosphoenolpyruvate carboxykinase and pyruvate kinase showed a similar change in hybrid F-1 and its parents. A. nigrocauda had the highest enzymes activities in intestinal protease and amylase, and hybrid culter had the highest intestinal lipase activities. Our results demonstrated that the hybrid culter has the better protein-sparing effects by increasing carbohydrate metabolism than its parent lines.

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