Fig. 4

Relationships between host genetic kinship and gut microbial similarity. a Scatter plot of the host genetic kinship of pairs of individuals (x axis) and their microbial similarity based on the five sample types (y axis). b Distribution of host genetic kinship generated from random sampling. The pair of chickens with genetic kinship < 0.05 and > 0.10 are viewed as genetically more distant and close relatives, respectively. c–e The Pearson correlation coefficients (density plots) between host genetic kinship and the gut microbial similarity of 10,000 random sampling and their 95% confident intervals (bar plots). The dots in the bars denote the average of the correlation coefficients. D, J, I, C, and F represent the duodenum, jejunum, ileum, cecum and feces, respectively