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Table 3 Genetic correlations (± standard errors) between excretion traits and performance

From: Improving the efficiency of feed utilization in poultry by selection. 2. Genetic parameters of excretion traits and correlations with anatomy of the gastro-intestinal tract and digestive efficiency

Trait1 CDUDM FEW/BW DEW/BW FEW/FI WE NE/NI PE/PI NE/PE
BW23 0.16 ± 0.06 -0.16 ± 0.21 -0.20 ± 0.15 0.44 ± 0.16 0.86 ± 0.10 -0.19 ± 0.12 0.03 ± 0.19 -0.52 ± 0.18
WG 0.21 ± ne -0.28 ± ne -0.29 ± ne 0.02 ± ne 0.24 ± 0.22 -0.37 ± ne -0.42 ± 0.15 -0.16 ± ne
FI -0.75 ± ne 0.58 ± ne 0.73 ± ne 0.41 ± ne -0.17 ± 0.18 0.45 ± ne 0.20 ± 0.14 0.34 ± 0.16
FCR -0.98 ± 0.01 0.99 ± 0.03 0.92 ± 0.05 0.76 ± ne2 -0.27 ± ne 0.95 ± ne 0.66 ± 0.11 0.88 ± ne
AMEn 0.99 ± 0.00 -0.97 ± 0.04 -0.92 ± 0.03 -0.66 ± 0.07 0.46 ± 0.15 -0.99 ± 0.01 -0.64 ± 0.07 -0.84 ± 0.08
RFI -0.64 ± ne 0.91 ± ne 0.88 ± ne 0.38 ± 0.15 -0.15 ± ne 0.37 ± 0.09 0.08 ± 0.14 0.30 ± ne
  1. 1 BW23, body weight at 23 d; WG, weight gain between 17 and 23 d; FI, feed intake between 17 and 23 d; FCR; feed conversion ratio; AMEn, apparent metabolisable energy corrected for zero nitrogen balance; RFI, residual feed intake; CDUDM, coefficient of digestive use of dry matter; FEW/BW and DEW/BW, fresh and dry excreta weight relative to body weight at 23 d; FEW/FI, fresh excreta weight relative to feed intake; WE, water content of excreta; NE/NI, PE/PI, ratio of nitrogen and phosphorus excretion to intake; NE/PE, ratio of nitrogen to phosphorus excretion.
  2. 2 ne: not estimated