Effects of dietary lysine on productivity, reproductive performance, protein and lipid metabolism-related gene expression in laying duck breeders
文献类型： 外文期刊
作者： Ruan, D. 1 ; Fouad, A. M. 1 ; Zhang, Y. N. 1 ; Wang, S. 1 ; Chen, W. 1 ; Xia, W. G. 1 ; Jiang, S. Q. 1 ; Yang, L. 5 ; Zheng, 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Key Lab Anim Nutr & Feed Sci South China, Inst Anim Sci, Minist Agr, Guangzhou 510640, Guangdong, Peoples R China
2.State Key Lab Livestock & Poultry Breeding, Guangzhou 510640, Guangdong, Peoples R China
3.Guangdong Pub Lab Anim Breeding & Nutr, Guangzhou 510640, Guangdong, Peoples R China
4.Guangdong Key Lab Anim Breeding & Nutr, Guangzhou 510640, Guangdong, Peoples R China
5.South China Agr Univ, Coll Anim Sci, Guangzhou 510640, Guangdong, Peoples R China
6.Cairo Univ, Dept Anim Prod, Fac Agr, Giza 12613, Egypt
关键词： lysine; proteolysis; lipid metabolism; performance; laying duck breeders
期刊名称：POULTRY SCIENCE （ 影响因子：3.352； 五年影响因子：3.679 ）
ISSN： 0032-5791
年卷期： 2019 年 98 卷 11 期
页码：
收录情况： SCI
摘要： This study investigated whether dietary lysine (Lys) affects productive performance and expression of genes related to protein and lipid metabolism in laying duck breeders. Longyan duck breeders (n = 540, 19 wk of age) were randomly assigned to 6 groups with 6 replicates of 15 birds each. Breeders were fed diets with 6 total Lys levels (6.4, 7.2, 8.0, 8.8, 9.6, and 10.4 g/kg) for 26 wk duration. Egg production, egg weight, egg mass, feed conversion ratio, hatchability, hatchling weight, albumen weight, eggshell weight, yolk weight, and yolk proportion increased with dietary Lys levels (P < 0.05). Dietary Lys level had a linear (P < 0.05) and quadratic (P < 0.05) effects on maternal hepatic expression of mechanistic target of rapamycin, eukaryotic translation initiation factor 4E binding protein 1, ubiquitin conjugating enzyme E2K (UBE2K), cathepsin B (CTSB), and quadratically (P < 0.05) increased the concentrations of plasma Lys, leucine, threonine, and tryptophan in duck breeders. In contrast, maternal dietary Lys suppressed expression of proteasome 26S subunit, UBE2K, and CTSB in the liver of hatchlings. Moreover, relative expression of peroxisome proliferator-activated receptors alpha, carnitine palmitoyltransferase 1A, and very low density apolipoprotein-II increased linearly (P < 0.05) and quadratically (P < 0.05), and that of VLDL receptor (VLDLR) decreased quadratically (P < 0.05) in the liver of duck breeders with increasing dietary Lys levels; hepatic triglyceride and cholesterol contents were reduced. Maternal dietary Lys suppressed hepatic expression of VLDLR in the hatchlings. A diet containing 8.6 g Lys/kg promoted protein turnover and lipid metabolism in laying duck breeders, which positively reflected in the productivity and reproductive performance.
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