Figure 4.

Comparison of the serum corticosterone levels (ng/mL) and HSP70 expression in the different broilers and under different conditions. (a) Means content of serum corticosterone; (b) means the HSP70 mRNA expression levels; (c) means the HSP70 protein expression levels, and in the bottom, lane 1: 42-day-old H-WRR, lane 2: 42-day-old WRR. lane 3: 49-day-old H-WRR, lane 4: 49-day-old WRR, lane 5: 42-day-old H-LS, Lane 6: 42-day-old WRR, lane 7: 49-day-old H-LS, lane 8: 49-day-old LS. Significant differences exist in the values with lower case letters in the same cluster, of the same breed, at the same age (P < 0.05). Highly significant differences exist in the values with upper case letters (P < 0.01).