Fig. 1

UniFrac principal coordinates analysis (PCoA) displaying correlations among the bacterial communities of the 4 feed efficiency groups. a Weighted PCoA analyzed from rarefied subsets of 100,000 sequences from each sample. b Unweighted PCoA analyzed from rarefied subsets of 100,000 sequences from each sample. n = 8, represented by differing symbols: ADG_High–ADFI_High orange circle, ADG_High–ADFI_Low blue triangle, ADG_Low–ADFI_Low red square, ADG_Low–ADFI_High green triangle.