Figure 4.

Principal coordinate analysis (PCoA) representing similarity of cecal microbiota in broilers fed corn- or wheat-based diets. The PCoA was performed by using Weighted UniFrac distance to determine β-diversity of bacterial communities between different groups. No distinct clustering due to xylanase supplementation was denoted (WCON vs. WXY; CCON vs. CXY). However, a less pronounced but distinct variation was observed in broilers fed wheat- or corn-based diets (ANOSIM, R=0.1572, P=0.003). Wheat-soybean basal diet (WCON); wheat-soybean basal diet with 4,000U/kg xylanase (WXY); corn-soybean basal diet (CCON); and corn-soybean basal diet with 4,000U/kg xylanase (CXY).