1 材料与方法
1.1 采集样品
1.2 样品分组及宏基因组测序
1.3 数据处理与统计分析
2 结果与分析
2.1 宏基因组测序
表1 粪便微生物群落α多样性分析Table 1 α diversity analysis of fecal microbial community |
| 样品名称 Sample names | α多样性指数α diversity indexes | |||
|---|---|---|---|---|
| Shannon指数 Shannon index | Simpson指数 Simpson index | Chao1指数 Chao1 index | ACE指数 ACE index | |
| FY1 | 4.66 | 0.909 | 337.25 | 339.14 |
| FY2 | 3.76 | 0.855 | 274.60 | 271.16 |
| FY3 | 2.63 | 0.631 | 262.83 | 264.47 |
| ZY1 | 5.67 | 0.957 | 410.00 | 415.48 |
| ZY2 | 4.46 | 0.844 | 428.02 | 430.94 |
| ZY3 | 5.31 | 0.918 | 543.69 | 544.07 |
2.2 门水平菌群结构分析
图1 腹泻组和正常组牦牛犊牛门水平物种相对丰度柱形图Firmicutes:厚壁菌门; Bacteroidetes:拟杆菌门; Proteobacteria:变形菌门;Fusobacteria:梭杆菌门;Actinobacteria:放线菌门;Tenericutes:软毛杆菌门;Fibrobacteres:纤维杆菌门;Chlamydiae:衣原体门;Spirochaetes:螺旋体门;Others:其他。 Fig.1 Histogram of relative abundance of species at phylum level of yak calves in diarrhea group and normal group |
图2 门水平基于MetaStat分析显著差异物种的箱图FY:腹泻组 diarrhea group;ZY:正常组 normal group。 *表示2组间差异显著(P<0.05)。* indicated that the difference between the two groups was significant (P<0.05). Fig.2 Box diagram of species with significant difference at phylum level based on MetaStat analysis |
2.3 肠道微生物宏基因组功能注释分析
2.3.1 肠道微生物宏基因组测序KEGG分析
2.3.2 EggNOG水平功能比较分析
图4 基于EggNOG基因数目分布热图Cell motility:细胞运动性;Extracellular structures:细胞外结构;RNA processing and modification:RNA加工和修饰;Secondary metabolites biosynthesis, transport and catabolism:次级代谢产物生物合成、运输和分解代谢;Transcription:转录;Intracellular trafficking, secretion and vesicular transport:细胞内运输、分泌和囊泡转运;Carbohydrate transport and metabolism:碳水化合物运输和代谢;Function unknown:功能未知;Cell wall/membrane/envelope biogenesis:细胞壁/膜/包膜生物发生;Posttranslational modification, protein turnover, chaperones:翻译后修饰、蛋白质周转和伴侣;Defense mechanisms:防御机制;Inorganic ion transport and metabolism:机离子转运与代谢;Signal transduction mechanism:信号转导机制;Amino acid transport and metabolism:氨基酸转运与代谢;Replication,recombination and repair:复制、重组和修复;Coenzyme transport and metabolism:辅酶转运和代谢;Nucleotide transport and metabolism:核苷酸转运和代谢;Translation, ribosomal structure and biogenesis:翻译、核糖体结构与生物发生;Cell cycle control, cell division and chromosome partitioning:细胞周期控制、细胞分裂和染色体分配;Lipid transport and metabolism:脂质转运和代谢;Energy production and transformation:能量产生和转化;Cytoskeleton:细胞骨架;Chromatin structure and dynamics:染色质结构和动力学。 Fig.4 Heat map based on EggNOG gene number distribution |

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