Hierarchical clustering analysis of differentially expressed genes during TD. Hierarchical clustering analyses of the 1630 transcripts (p < 0.05, FC ≥ 2.0) on days 1, 2, and 6. Red, gray, and blue represent high, average, and absent expression levels of genes, respectively. Each row represents one chicken, and each column refers to a gene. 1C, 2C, and 6C indicates days 1, 2 and 6 for the control group respectively, while 1T, 2T, and 6T denotes days 1, 2, and 6 for the thiram-fed group, respectively.