Differential growth performance and intestinal immune gene expression in diverse genetic lines of growing chickens fed a high concentration of supplemental phytase
文献类型： 外文期刊
作者： Jiang, S. Q. 1 ; Lamont, S. J. 1 ; Persia, M. E. 1 ;
作者机构： 1.Iowa State Univ, Dept Anim Sci, Ames, IA 50011 USA
2.Guangdong Acad Agr Sci, State Key Lab Livestock & Poultry Breeding, Key Lab Anim Nutr & Feed Sci South China, Inst Anim Sci,Minist Agr, Guangzhou 510640, Guangdong, Peoples R China
关键词： Broiler chicken; cytokine; growth performance; mucin; phytase
期刊名称：JOURNAL OF AGRICULTURAL SCIENCE （ 影响因子：1.476； 五年影响因子：1.891 ）
ISSN： 0021-8596
年卷期： 2018 年 156 卷 2 期
页码：
收录情况： SCI
摘要： The objective of the current experiment was to determine the effects of high-concentration phytase (5000 FTU/kg) feeding to diverse lines of chickens fed phosphorus (P) adequate maize-soybean meal diets (4.5 g/kg non-phytate P) on the performance and intestinal immune function. Performance was measured for outbred broiler (Ross 308) and inbred Fayoumi lines over 0-21 days, and duodenum and ileum were harvested for the determination of mucin-2, interleukin (IL)-1 beta and IgA mRNA by quantitative reverse transcription polymerase chain reaction. Over the 0-7-day period, there was a significant line x diet interaction, as high phytase supplementation increased broiler average daily gain (ADG), but had no effect on Fayoumi ADG. Treatment of diets with phytase increased expression of the mucin-2 gene in the duodenum mucosa. There were significant interactions between line and age, and line, diet and age on duodenal expression of the IL-1 beta gene as phytase supplementation of the broiler line reduced IL-1 beta in comparison to control fed broilers without change in the Fayoumi line. Overall, the addition of a high concentration of phytase to broilers fed adequate concentrations of non-phytate P resulted in improved growth performance early with a reduction in this effect over time. Mucosal mucin-2 expression was increased with high-concentration phytase feeding across both lines, but IL-1 beta mRNA expression was reduced in the duodenum of broilers fed high concentrations of phytase, suggesting that the increased performance noted might be related to decreased inflammation.
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