Fig. 2

Beta diversity in the ileal content of Jungle Fowl (JF), Athens Canadian Random Bred (ACRB), 1995 Random Bred (L1995), and 2015 Modern Random Bred (L2015) chicken lines raised under thermoneutral (TN) or heat stress (HS) condition (8 h/d; 36 °C) on d 56. 2D principal coordinate analysis (PCoA) plot is based on weighted UniFrac distance matrix. Each sphere represents a sample