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. 2021 Jul 2;8:666535. doi: 10.3389/fvets.2021.666535

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Copyright © 2021 Sun, Hou and Yang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Abundance histograms of some low-abundance dominant bacteria of chickens in different growth periods. (A,B) Abundance histograms of significant dominant short-chain fatty acid (SCFA)-producing bacteria Anaerostipes and fiber-degradation bacteria species Bacteroides thetaiotaomicron at 8 weeks. (C–E) Abundance histograms of significant dominant fiber-degradation bacteria genera Prevotellae_Ga6A1_group and Bifidobacterium and SCFA-producing species of Lactobacillus at 20 weeks. (F,G) Abundance histograms of dominant fiber-degradation bacteria genera at 50 weeks. Bacteria with different superscript letters mean significant differences (P < 0.05) between groups, and different superscript letters mean extremely significant differences (P < 0.01).