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. 2023 May 29;102(8):102818. doi: 10.1016/j.psj.2023.102818

Table 3.

Mean, standard error of the mean (SEM), and phenotypic correlation for performance traits of small-sized meat ducks classified as low-, medium-, and high-residual feed intake (RFI) or low-, medium-, and high-residual intake and gain (RIG).

Trait1 RFI
 RIG
 Correlation coefficients
Low Medium High SEM P value Low Medium High SEM P value RFI RIG
Initial BW (g) 774.13 765.57 769.87 12.893 0.898 773.43 765.05 779.58 13.277 0.752 −0.063 −0.007
Final BW (g) 2071.87 2026.83 2056.30 20.908 0.311 2047.64 2031.33 2087.96 21.853 0.188 −0.159 0.212
MBW0.75 (g) 307.03 301.97 305.26 2.332 0.306 304.30 302.50 308.83 2.434 0.185 0.042 0.213
ADFI (g/d) 134.15c 155.79b 182.41a 1.018 <0.001 181.91a 156.04b 134.62c 1.057 <0.001 0.257* −0.942⁎⁎
ADG (g/d) 61.20 60.06 61.57 0.859 0.440 60.64 60.30 61.90 0.743 0.302 −0.135 0.275*
FCR (g/g) 2.19c 2.61b 3.00a 0.025 <0.001 3.02a 2.59b 2.16c 0.021 <0.001 0.949⁎⁎ −0.987⁎⁎
RFI (g/d) −24.99c 0.00b 25.37a 0.527 <0.001 25.65a −0.00b −25.63c 0.513 <0.001 - −0.994⁎⁎
RG (g/d) 0.91 −0.00 −0.67 0.536 0.118 −0.97c 0.01 0.90a 0.493 0.024 −0.231* 0.405⁎⁎
RIG (g/d) 25.90a −0.12 −26.04c 0.798 <0.001 −26.62c 0.00b 26.53a 0.691 <0.001 −0.991⁎⁎ -
a

Different letters within a row and of the RFI or RIG classification indicate significant differences (P < 0.05).

b

Different letters within a row and of the RFI or RIG classification indicate significant differences (P < 0.05).

c

Different letters within a row and of the RFI or RIG classification indicate significant differences (P < 0.05).

⁎

Indicates a significant correlation (P < 0.05).

⁎⁎

Indicates an extremely significant correlation (P < 0.01).

1

BW = body weight; MBW0.75 = metabolic body weight; ADFI = average daily feed intake; ADG = average daily gain; FCR = feed conversion ratio; RFI = residual feed intake; RG = residual gain; RIG = residual intake and gain.