›› 2019, Vol. 46 ›› Issue (5): 1370-1378.doi: 10.16431/j.cnki.1671-7236.2019.05.014

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Analysis of Rumen Microbial Diversity and Functional Prediction of Chinese Simmental Cattle Based on 16S rRNA High-throughput Sequencing Technology

WU Qiong, WANG Sizhen, ZHANG Shi, HU Zongfu, YANG Hao, NIU Huaxin   

  1. College of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao 028000, China
  • Received:2018-09-12 Online:2019-05-20 Published:2019-05-20

Abstract:

To systematically explore the microbial diversity and function in the rumen of Chinese Simmental cattle,this experiment used 16S rRNA gene high-throughput sequencing technology to detect and analyze the rumen fluid samples of Simmental cattle (about 20 months old,the average weight was 550 kg),and its function was predicted by PICRUSt.The results showed that a total of 66 712 high-quality sequences were obtained from the Illumina Miseq sequencing platform,and 1 797 operational classification units (OTU) were obtained by cluster analysis.The taxonomic identification was divided into 13 phylums,20 classes,22 orders,33 families and 59 genuses;Firmicutes and Bacteroidetes were dominant bacteria,accounting for 62.46% and 22.45%,respectively;Based on the genus composition,[Eubacterium]_coprostanoligenes_group (9.16%),Ruminococcus_2 (7.90%),norank_f__Bacteroidales_RF16_group(6.23%),norank_f__Ruminococcaceae(4.79%),Rikenellaceae_RC9_gut_group(4.72%),norank_f_Bacteroidales_BS11_gut_group(4.49%),Ruminococcus_1(4.43%),etc.The PICRUSt function of the 16S rRNA genome predicted that the rumen flora function was mainly concentrated in carbohydrate transport and metabolism,and might contain a large amount of cellulose and lignin degrading enzyme genes.In summary,the high-throughput sequencing technology based on 16S rRNA gene fully revealed the diversity of rumen bacteria in Simmental cattle,and predicted that it was rich in protein decomposition and lignocellulose degrading enzymes.The basis of microbial cognition provided a reference for further research on rumen microbial functional genes closely related to some important nutritional and physiological functions.

Key words: Simmental cattle; rumen; 16S rRNA; microorganism

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