Fig. 1

Growth rate evaluation. A Male and female ducks' body weight growth curve from birth to 120-day old. The X-axis and Y-axis showed the ages and body weights, respectively. B and C The RGRs B AGRs C of S1-S5 growth stages. The dots in the bar charts showed the RGR or AGR of one individual. The X-axis and Y-axis represent different growth stages and growth rates data. D and E Comparison of RGRs and AGRs between the ducks heavier and lower than average body weight in 120-day old. The significance was shown as * (P < 0.05) and ** (P < 0.01). The contents represented by the horizontal and vertical coordinates were consistent with Fig. B and C. F The correlation analysis between growth rates and body weight data at 120-day old. The fitting curves and the Pearson correlation coefficient (R²) could reflect the correlation degree. The abscissa of each scatter plot represents the growth rates, and the ordinate represents 120-day body weight