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The effect of a tributyrin on ovary apoptosis of broiler breeders with different egg-laying rate. Each means represents 1 layers/replicate, 8 replicates/treatment. (A) Ovary apoptosis (TUNEL). Apoptotic color is light yellow or brown yellow (as shown by black arrow), negative expression is blue with white background. (B) Ovary apoptosis rate. Abbreviations: AR, average egg laying rate; LR, low egg laying rate; TRI, 1,000 mg/kg tributyrin.
