Early Methanogenic Colonisation in the Faeces of Meishan and Yorkshire Piglets as Determined by Pyrosequencing Analysis

Figure 2

Double dendrogram showing the distribution of methanogens in the faeces of Meishan and Yorkshire piglets (OTU level). The relationship among samples was determined using Bray distance and the complete clustering method. A total of 47 OTUs with an abundance higher than 0.3% within total methanogens were selected for the analysis. The heatmap plot depicts the relative abundance of each OTU (variables clustering on the 𝑦-axis) within each sample (𝑥-axis clustering). The relative values for the OTUs are depicted by colour intensity in the legend at the top of the figure. Clusters based on the distance of all samples along the 𝑥-axis and the different OTUs along the 𝑦-axis are indicated at the top and left of the figure, respectively. A–D: litter numbers of Yorkshire piglets; E–H: litter numbers of Meishan piglets.