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Table 2 Estimated heritability (± standard errors, on diagonal) and genetic correlations (± standard errors, above diagonal) for excretion traits.

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

  CDUDM1 FEW/BW DEW/BW FEW/FI WE NE/NI PE/PI NE/PE
CDUDM 0.30 ± 0.02 -0.94 ± ne -0.93 ± ne -0.64 ± ne2 0.39 ± ne -1.00 ± ne -0.68 ± 0.07 -0.87 ± ne
FEW/BW   0.09 ± 0.01 1.00 ± 0.01 0.76 ± 0.07 -0.22 ± 0.25 0.82 ± ne 0.43 ± 0.18 0.76 ± 0.23
DEW/BW    0.20 ± 0.03 0.51 ± 0.09 -0.37 ± 0.15 0.76 ± ne 0.36 ± 0.08 0.67 ± 0.13
FEW/FI     0.17 ± 0.04 0.54 ± ne 0.67 ± ne 0.87 ± 0.08 -0.05 ± 0.17
WE      0.13 ± 0.05 -0.34 ± ne 0.33 ± 0.17 -0.75 ± 0.12
NE/NI       0.29 ± 0.02 0.74 ± 0.06 0.58 ± ne
PE/PI        0.22 ± 0.04 -0.11 ± ne
NE/PE         0.18 ± 0.04
  1. 1 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/PE, ratio of nitrogen to phosphorus excretion; NE/NI, PE/PI, nitrogen and phosphorus excreted relative to nitrogen and phosphorus intake
  2. 2 ne: not estimated