Figure 3.

The mRNA expression of IGF1 in different tissues of a 0-week-old Shitou goose. The ${}^{*}$ symbol represents a significant difference ($P\mathit{<}\mathrm{0.05}$). The ${}^{**}$ symbol represents a very significant difference ($P\mathit{<}\mathrm{0.01}$). The same applies to Figs. 4 to 7. Values are shown as the mean $\pm$ SD ($n=\mathrm{3}$); the same applies to Figs. 4 to 7.