鸡生长发育中盲肠微生物菌群结构的PCR-DGGE分析

研究依莎褐蛋鸡和艾维茵肉鸡发育正常及迟缓鸡群的盲肠细菌种群结构和多样性变化。使用基于16S rDNA的PCR-DGGE技术,结合割胶回收DNA进行克隆和测序,分别对4、6、10、16、20和40周龄蛋鸡及1、2、4、6、7和8周龄肉鸡发育正常、迟缓鸡群盲肠内容物的细菌群落进行特异性引物图谱指纹和聚类分析,鉴定特异性和共性群落。结果表明,Lactobacillus属在两品种发育正常鸡群盲肠内容物细菌的相似性均高于迟缓鸡群,两品种各周龄和发育正常、迟缓鸡群间指纹图谱平均条带数差异显著（P〈0.05）。而Bacteroides属在发育正常鸡群盲肠内容物细菌的相似性与迟缓鸡群较为相近;发育正常、迟缓鸡群间平均条带数差异显著（P〈0.05）。Clostridium属在蛋鸡20、40周龄的平均条带数差异不显著（P〉0.05）,但肉鸡各周龄和发育正常、迟缓鸡群间的平均条带数差异显著（P〈0.05）。序列测序结果,Lactobacillus属在蛋鸡产蛋期发育正常、迟缓鸡群均定居于Lactobacillus agilis;而育雏和育成期定居于Lactobacillus aviaries和不可培养的细菌。两品种发育正常、迟缓鸡群均定居于Bacteroides属的Bacteroides acidifaciens、Uncultured bacterium,而发育正常、迟缓蛋鸡群存在Clostridium属Uncultured proteobacterium,发育正常肉鸡群定居Shigella sonnei,而两品种发育迟缓鸡群均缺乏此类菌种。结果显示,依莎褐蛋鸡和艾维茵肉鸡群各饲养阶段盲肠细菌群落差异显著,对鸡群正常生长发育影响较大。

Analysis of chicken cecal microbial flora the structure growthand development of PCR-DGGE

This research is to study the effects of Normal,slow development layers and broiler on cecal bacterial population structure and diversity.To identify specific and common community members,cecal bacterial population structure and diversity in 4-,6-,10-,16-,20-,and 40-week-old commercial layers and 1-,2-,4-,6-,7-,and 8-week-old broiler chickens of Normal development,slow comparatively studied using PCR-DGGE of 16S rDNA,combined with cloning and sequencing of DNA recovered from specific and common tapping band...