作　　者： ; ; ; ; ;

机构地区： 河南省农业科学院

出　　处： 《畜牧兽医学报》 2004年第3期353-356,共4页

摘　　要： 156 one-day-old broiler chicks were divided into control and treatment groups with 6 replicates for each group to determine the effects of xylanase supplementation(1‰)on performances and SS mRNA expression of broilers fed with wheat basal diet.The results showed that xylanase significantly increased ADG(average daily gain) by 4.81%(P<0.01),While decreased F/G(feed/gain)by 5.00%(P<0.05).Semi-quantitative RT-PCR results showed a significant down-regulation of SS mRNA expression in duodenum(16.45%,P<0.05),but not in jejunum of treated chicken.In addition,a clear difference in the abundance of SS mRNA expression was shown between duodenum and jejunum in the control chickens.This result indicates that the expression of SS mRNA is regulated differently in different segments of small intestine in the chicken and xylanase may affect the duodenal expression SS mRNA to achieve its growth promoting effects in broiler chickens fed on wheat basal diet. 156 one-day-old broiler chicks were divided into control and treatment groups with 6 replicates for each group to determine the effects of xylanase supplementation(1‰)on performances and SS mRNA expression of broilers fed with wheat basal diet.The results showed that xylanase significantly increased ADG(average daily gain) by 4.81%(P<0.01),While decreased F/G(feed/gain)by 5.00%(P<0.05).Semi-quantitative RT-PCR results showed a significant down-regulation of SS mRNA expression in duodenum(16.45%,P<0.05),but not in jejunum of treated chicken.In addition,a clear difference in the abundance of SS mRNA expression was shown between duodenum and jejunum in the control chickens.This result indicates that the expression of SS mRNA is regulated differently in different segments of small intestine in the chicken and xylanase may affect the duodenal expression SS mRNA to achieve its growth promoting effects in broiler chickens fed on wheat basal diet.

关 键 词： 木聚糖酶 肉鸡 十二指肠 空肠 生长抑素 基因表达 饲料添加剂

领　　域： [农业科学] [农业科学] [农业科学] [农业科学] [农业科学]