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Table 1 The description of the 17 analyzed traits of body conformation, feet and leg structure and overall leg action.

From: Large-scale association study for structural soundness and leg locomotion traits in the pig

  

Score

  

Trait

Description

1

9

Heritability Estimate

Mean (SD)

Body length

Distance from tail to scapulae viewed from side

Short

Long

0.26a 0.29d

4.79 (0.97)

Body depth

Distance from back to sternum viewed from side

Deep

Shallow

0.34d

4.12 (1.22)

Body width

Rump width (Butterfly shape) viewed from rear

Narrow

Wide

0.69a 0.25d

5.38 (1.22)

Top Line

Arch straightness between shoulder and rump viewed from side

Weak

High topped

0.11–0.12d

5.18 (0.80)

0.52 (0.63)e

Hip structure

Hip line and tail setting viewed from side

Level

Steep

0.18d

4.30 (1.75)

Rib shape

Breast width view from the horizontal

More shape

Less shape

0.26d

4.33 (1.59)

Front turned in/out

Front hocks turned inward/outward from each other viewed from front

Turned out

Turned in

0.09a 0.09–0.16b 0.02–0.03c 0.02–0.06d

3.95 (0.71)

1.05 (0.70)e

Front pastern posture

Angle of front foot viewed from side

Weak and soft

Upright

0.38a 0.26–0.35b 0.28d

4.51 (1.61)

Buck knee

Over at the knee of front legs viewed from side

Upright

Severe buck knees

0.36a 0.28b 0.14–0.19c 0.13d

4.65 (1.64)

Front foot size

Front foot size

Large

Small

0.16d

5.28 (0.92)

Front uneven toes

Even and uniform shape of front hooves

Even

Severely uneven

0.01–0.13b 0.00–0.05c 0.09d

2.20 (0.96)

Rear turned in/out

Rear hocks turned inward/outward from each other viewed from rear

Turned out

Turned in

0.16a 0.15–0.22b 0.14–0.17d

4.02 (0.76)

1.01 (0.73)e

Rear pastern posture

Angle of rear foot viewed from side

Weak and soft

Upright

0.12a 0.29–0.32b 0.02–0.06c 0.31d

4.25 (1.33)

Weak rear legs

Angle of rear hocks viewed from side

Weak

Upright

0.10a 0.02–0.10b 0.14d

4.25 (1.33)

0.94 (0.80)e

Rear foot size

Rear foot size

Large

Small

0.23a 0.13d

5.17 (1.02)

Rear uneven toes

Even and uniform shape of rear hooves

Even

Severely uneven

0.48a 0.13–0.19b 0.07–0.18c 0.12d

2.31 (1.05)

Overall leg action

Structural soundness and movement and freedom of other defects

Excellent movement

Most severe/unable to walk

0.06c 0.12d

4.59 (1.84)

  1. aDutch Landrace and Dutch Yorkshire [13].
  2. bDanish Landrace and Danish Yorkshire [10].
  3. cFinish Landrace and Finish Large White [11].
  4. dCommercial Landrace × Large White [12].
  5. eAdjusted data by subtracting 5 from the original score and taking the absolute value for each trait in this study.