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Table 5 Genetic correlations (± standard errors) between excretion traits and gastro-intestinal tract morphology

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

CW

0.11 ± 0.10

0.43 ± 0.17

0.17 ± 0.15

0.30 ± 0.19

0.26 ± ne

-0.11 ± 0.13

0.02 ± 0.09

-0.13 ± ne

PRW

0.63 ± ne

-0.44 ± 0.32

0.02 ± 0.22

0.04 ± 0.18

-0.48 ± 0.18

-0.12 ± 0.19

0.36 ± 0.18

-0.48 ± 0.18

GZW

0.43 ± 0.15

0.01 ± 0.20

-0.19 ± 0.15

-0.14 ± ne

0.13 ± 0.21

-0.20 ± 0.14

0.07 ± 0.18

-0.23 ± 0.20

DW

-0.37 ± 0.08

0.44 ± 0.17

0.32 ± 0.10

-0.02 ± 0.15

-0.48 ± ne

0.42 ± 0.10

0.20 ± 0.15

0.05 ± 0.14

JW

-0.66 ± ne

0.65 ± 0.10

0.50 ± 0.11

0.17 ± ne

-0.38 ± 0.20

0.72 ± 0.08

0.63 ± 0.12

0.28 ± 0.14

IW

-0.75 ± 0.07

0.73 ± 0.10

0.44 ± ne

0.47 ± 0.15

0.09 ± 0.16

0.70 ± 0.06

0.76 ± 0.11

0.20 ± 0.14

DL

-0.03 ± ne

0.02 ± ne

0.17 ± ne

-0.35 ± 0.18

-0.87 ± 0.07

0.19 ± ne

-0.09 ± ne

0.54 ± ne

JL

-0.06 ± ne

-0.19 ± 0.19

0.09 ± 0.12

-0.25 ± 0.19

-0.90 ± 0.09

0.25 ± ne

0.17 ± 0.17

0.37 ± 0.18

IL

-0.01 ± ne

-0.20 ± ne

0.06 ± 0.13

-0.31 ± 0.19

-0.77 ± 0.21

0.08 ± ne

0.07 ± ne

0.23 ± ne

DD

-0.35 ± 0.08

0.43 ± 0.16

0.10 ± 0.12

0.48 ± 0.15

0.54 ± 0.22

0.28 ± 0.10

0.33 ± 0.15

-0.10 ± 0.16

JD

-0.41 ± 0.08

0.59 ± 0.15

0.25 ± 0.12

0.42 ± 0.14

0.45 ± 0.20

0.32 ± ne

0.39 ± 0.14

-0.14 ± 0.12

ID

-0.52 ± ne

0.68 ± ne

0.27 ± 0.13

0.72 ± 0.13

0.55 ± ne

0.50 ± 0.10

0.57 ± 0.13

-0.14 ± 0.14

  1. 1CW, PRW, GZW, LW, DW, JW, IW, relative weights of crop, proventriculus, gizzard, liver, duodenum, jejunum, and ileum; DL, JL, IL, relative lengths of duodenum, jejunum, and ileum; DD, JD, ID, density of duodenum, jejunum, and ileum; 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