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Dynamic alterations in yak (Bos grunniens) rumen microbiome in response to seasonal variations in diet

文献类型： 外文期刊

作者： Jiang, Hui 1 ; Cao, Han -Wen 1 ; Chai, Zhi-Xin 3 ; Chen, Xiao-Ying 1 ; Zhang, Cheng-Fu 1 ; Zhu, Yong 1 ; Xin, Jin-Wei 1 ;

作者机构： 1.State Key Lab Hulless Barley & Yak Germplasm Resou, Lhasa, Peoples R China

2.Tibet Acad Agr & Anim Husb Sci, Inst Anim Sci & Vet, Key Lab Anim Genet & Breeding Tibetan Plateau, Minist Agr & Rural Affairs, Lhasa, Peoples R China

3.Southwest Minzu Univ, Key Lab Qinghai Tibetan Plateau Anim Genet Resourc, Sichuan Prov & Minist Educ, Chengdu, Peoples R China

关键词： CAZymes; metagenome; 16S rRNA; rumen microbe; yak

期刊名称：PHYSIOLOGICAL GENOMICS （ 影响因子：4.297； 五年影响因子：4.226 ）

ISSN： 1094-8341

年卷期： 2022 年 54 卷 12 期

页码：

收录情况： SCI

摘要： Rumen microorganisms play important roles in the healthy growth of yaks. This study investigated changes in yak rumen micro-biome during natural grazing at the warm seasons and supplementary feeding at cold seasons. High-throughput sequencing of 16S rRNA and metagenome analysis were conducted to investigate the structures and functions of yak rumen microbial com-munities. The results indicated that Bacteroidetes and Firmicutes were the most abundant phyla. In addition, Bacteroidetes might play a more important role than Firmicutes during the supplementary feeding stage (spring and winter), but less during natural grazing stage (summer and autumn). KEGG analysis showed that the amino sugar and nucleotide sugar metabolism, glycolysis/ gluconeogenesis, pyruvate metabolism, starch and sucrose metabolism, and fructose and mannose metabolism were the main pathways in the microbial community, which were significantly different between seasons. The carbohydrate-active enzymes (CAZyme) annotation revealed that cellulose was an important carbon source for microorganisms in yak rumen. Glycoside hydro-lases (GHs) were the most abundant class of CAZymes, followed by glycosyl transferases (GTs), which were important to diges-tion of oil, cellulose, and hemicellulose in food. These results contribute to the understanding of microbial components and functions in yak rumen.

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