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Table 2 Estimates of heritabilities (diagonal), genetic correlations (below the diagonal), and environmental correlations (above the diagonal), with standard errors, between egg production, body mass, and bone traits for the White Leghorn b (WLb) and Rhode Island Red (RIR) populations

From: No evidence that selection for egg production persistency causes loss of bone quality in laying hens

 

Humerus breaking strain

Humerus density

Tibia breaking strain

Tibia density

Keel density

Early egg (1st two periods)

Late egg number

Egg breaking strain

Average egg mass

Cull body mass

White Leghorn b (WLb)

 Humerus breaking strain (N)

0.30 ± 0.07

0.37 ± 0.05

0.30 ± 0.06

0.06 ± 0.08

− 0.07 ± 0.08

0.03 ± 0.08

0.12 ± 0.06

0.04 ± 0.06

0.07 ± 0.08

0.07 ± 0.09

 Humerus density (mm Al equiv)

0.68 ± 0.15

0.19 ± 0.06

0.25 ± 0.06

0.18 ± 0.07

0.08 ± 0.08

0.09 ± 0.08

− 0.07 ± 0.06

0.04 ± 0.06

0.02 ± 0.07

0.07 ± 0.07

 Tibia breaking strain (N)

0.76 ± 0.14

0.43 ± 0.20

0.24 ± 0.07

0.47 ± 0.06

0.08 ± 0.05

0.14 ± 0.07

− 0.02 ± 0.06

0.00 ± 0.06

0.00 ± 0.08

0.31 ± 0.07

 Tibia density (mm Al equiv)

0.50 ± 0.15

0.60 ± 0.14

0.84 ± 0.07

0.48 ± 0.08

0.17 ± 0.11

0.13 ± 0.09

− 0.00 ± 0.067

− 0.05 ± 0.07

− 0.05 ± 0.09

0.24 ± 0.08

 Keel density (mm Al equiv)

0.54 ± 0.31

0.83 ± 0.31

0.74 ± 0.39

0.58 ± 0.29

0.03 ± 0.04

0.06 ± 0.06

0.01 ± 0.06

0.07 ± 0.05

− 0.02 ± 0.06

− 0.02 ± 0.06

 Early egg number (1st two periods)

− 0.44 ± 0.18

− 0.51 ± 0.20

− 0.73 ± 0.15

− 0.60 ± 0.13

− 0.68 ± 0.59

0.34 ± 0.08

− 0.27 ± 0.06

− 0.07 ± 0.07

− 0.12 ± 0.09

0.14 ± 0.08

 Later egg number

− 0.02 ± 0.24

0.36 ± 0.25

0.25 ± 0.25

0.24 ± 0.21

− 0.10 ± 0.69

− 0.71 ± 0.16

0.16 ± 0.06

0.01 ± 0.06

0.06 ± 0.07

0.00 ± 0.07

 Egg breaking strain 45 weeks (N)

− 0.01 ± 0.23

− 0.11 ± 0.26

0.10 ± 0.24

0.01 ± 0.21

− 0.81 ± 0.88

0.09 ± 0.23

− 0.06 ± 0.28

0.17 ± 0.06

− 0.03 ± 0.07

0.18 ± 0.07

 Average egg mass (g)

0.23 ± 0.16

0.31 ± 0.19

0.08 ± 0.18

0.28 ± 0.14

0.11 ± 0.45

− 0.08 ± 0.16

− 0.08 ± 0.21

− 0.35 ± 0.19

0.45 ± 0.08

0.07 ± 0.09

 Cull Body Mass (g)

0.53 ± 0.09

0.47 ± 0.18

0.20 ± 0.18

0.38 ± 0.14

0.49 ± 0.66

− 0.64 ± 0.13

0.20 ± 0.17

− 0.36 ± 0.17

0.55 ± 0.09

0.36 ± 0.08

Rhode Island Red (RIR)

 Humerus breaking strain (N)

0.47 ± 0.08

0.52 ± 0.06

− 0.00 ± 0.11

− 0.03 ± 0.12

− 0.03 ± 0.07

− 0.26 ± 0.08

0.01 ± 0.07

− 0.01 ± 0.07

0.21 ± 0.11

0.08 ± 0.09

 Humerus density (mm Al equiv)

0.62 ± 0.10

0.36 ± 0.08

− 0.07 ± 0.10

− 0.05 ± 0.11

0.12 ± 0.06

− 0.08 ± 0.08

0.02 ± 0.06

0.11 ± 0.07

0.07 ± 0.10

− 0.05 ± 0.05

 Tibia breaking strain (N)

0.81 ± 0.07

0.71 ± 0.10

0.51 ± 0.08

0.53 ± 0.08

0.20 ± 0.07

0.06 ± 0.09

− 0.18 ± 0.07

0.11 ± 0.08

0.20 ± 0.12

0.13 ± 0.06

 Tibia density (mm Al equiv)

0.52 ± 0.11

0.65 ± 0.11

0.83 ± 0.05

0.59 ± 0.09

0.51 ± 0.06

0.05 ± 0.10

− 0.16 ± 0.08

0.06 ± 0.08

0.35 ± 0.13

0.22 ± 0.07

 Keel density (mm Al equiv)

0.50 ± 0.25

0.42 ± 0.26

0.72 ± 0.19

0.44 ± 0.23

0.08 ± 0.05

0.04 ± 0.06

0.05 ± 0.05

0.13 ± 0.06

0.13 ± 0.08

0.06 ± 0.04

 Early egg number (1st two periods)

− 0.15 ± 0.14

− 0.07 ± 0.17

− 0.25 ± 0.14

− 0.20 ± 0.14

− 0.15 ± 0.27

0.40 ± 0.08

− 0.05 ± 0.06

0.08 ± 0.06

− 0.19 ± 0.10

0.04 ± 0.06

 Later egg number

0.02 ± 0.22

− 0.35 ± 0.24

− 0.08 ± 0.21

− 0.05 ± 0.22

− 0.38 ± 0.38

0.15 ± 0.23

0.11 ± 0.05

0.06 ± 0.05

− 0.07 ± 0.08

0.07 ± 0.04

 Egg breaking strain 45 weeks (N)

0.16 ± 0.21

0.06 ± 0.24

− 0.35 ± 0.19

− 0.26 ± 0.20

− 0.78 ± 0.30

− 0.05 ± 0.21

0.11 ± 0.32

0.14 ± 0.06

− 0.02 ± 0.08

0.09 ± 0.05

 Average egg mass (g)

− 0.21 ± 0.14

− 0.06 ± 0.10

− 0.27 ± 0.13

− 0.21 ± 0.13

− 0.03 ± 0.26

− 0.33 ± 0.13

− 0.12 ± 0.22

− 0.13 ± 0.20

0.58 ± 0.08

0.26 ± 0.07

 Cull body mass (g)

0.17 ± 0.16

0.25 ± 0.11

0.25 ± 0.09

0.21 ± 0.10

0.29 ± 0.19

− 0.02 ± 0.10

0.10 ± 0.16

− 0.32 ± 0.14

0.03 ± 0.09

0.44 ± 0.04

  1. Figures in bold are considered significant
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Genetics Selection Evolution

ISSN: 1297-9686