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基于DGGE和T-RFLP分析采食不同粗饲料梅花鹿瘤胃细菌区系
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摘要
【目的】研究梅花鹿(Cervus nippon)瘤胃细菌区系,为梅花鹿瘤胃发酵调控提供分子生物学依据。【方法】采用DGGE与T-RFLP技术比较以玉米秸秆(CS组)和柞树叶(OL组)为主要粗饲料的梅花鹿瘤胃细菌区系变化。【结果】DGGE图谱聚类表明,OL组与CS组细菌区系相似度低于65%,而且同组不同个体之间瘤胃细菌区系存在差异。序列分析表明,OL组与CS组中存在大量Prevotella spp.,但不同组中Prevotella spp.在种水平组成不同,主要纤维降解菌为Clostridium spp.与Eubacterium spp.T-RFLP结果显示,OL组与CS组以及同组不同梅花鹿瘤胃细菌的丰富度、多样性、均匀度和优势度有差异。81、214、272和308bp的T-RFs为OL组优势条带,90、95、175、273和274 bp的T-RFs为CS组优势条带,161、259、264、266和284bp的T-RFs为共同条带。【结论】Prevotella spp.是梅花鹿瘤胃优势细菌,但不同粗饲料影响梅花鹿瘤胃细菌区系组成。
【Objective】The objective of present study is to investigate the bacterial diversity in the rumen of sika deer(Cervus nippon),which can provide molecular basis for manipulation of rumen fermentation.[Method]The bacterial communities in the rumen of sika deer feeding oak leaves based(OL group) and corn stalk based(CS group) diets were compared using DGGE and T- RFLP.[Result]The clustering patterns of DGGE indicated that the similarity of bacterial diversity between CS group and OL group was lower than 65%,the differences were found between animlas in the same group.Sequneces analysis of DGGE showed that Prevotella spp.were the dominant bacteria in the OL and CS groups,but the composition of genus Prevotella at species level was different in two groups.The dominant fibrolytic bacterial in two groups includes Clostridium spp.and Eubacterium spp..The results of T- RFLP showed that the richness,diversity,evenness and dominance indices between CS group and OL group,and anmilas in the same group were varied.T- RFs representing 81 bp,214bp,272 bp and 308 bp in OL group were dominant,90 bp,95bp,175 bp,273bp and 274 bp were predominant in CS group,and 161 bp,259 bp,264bp,266 bp and 284 bp were presented in all animals.[Conclusion]These results suggested that Prevotella spp.were the dominant bacteria in the rumen of sika deer.The forage source affected the rumen bacterial communities.
引文
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