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Table 4 Mean (highest posterior density interval at 95 %) of the marginal posterior distribution of genetic parameters estimated with the single-step model

From: Pedigree and genomic evaluation of pigs using a terminal-cross model

Trait

Parameter

h 2 A

t 2 AC

t 2 BC

rg A, AC

p 2 A

p 2 C

σ 2 A

σ 2 C

Growth rate

0.22

[0.05, 0.37]

0.25

[0.03, 0.45]

0.28

[0.12, 0.44]

0.84

[0.45, 1.00]

0.14

[0.06, 0.23]

0.09

[0.02, 0.16]

9151

[7954, 10,418]

8028

[6813, 9324]

Feed conversion ratio

0.32

[0.20, 0.46]

0.29

[0.13, 0.46]

0.18

[0.05, 0.32]

0.91

[0.72, 1.00]

0.10

[0.03, 0.18]

0.09

[0.03, 0.16]

0.02

[0.02, 0.03]

0.02

[0.02, 0.02]

Lean meat

0.41

[0.25, 0.57]

0.30

[0.14, 0.46]

0.28

[0.12, 0.45]

0.69

[0.30, 1.00]

0.04

[0.0001, 0.08]

0.06

[0.01, 0.12]

2.50

[2.19, 2.82]

3.15

[2.75, 3.59]

pH longissimus dorsi

0.30

[0.17, 0.36]

0.26

[0.16, 0.40]

0.11

[0.02, 0.22]

0.97

[0.83, 1.00]

0.02

[0.02, 0.02]

0.02

[0.02, 0.03]

Drip loss

0.57

[0.44, 0.69]

0.21

[0.08, 0.35]

0.15

[0.03, 0.30]

0.89

[0.62, 1.00]

6.21

[5.41, 7.04]

3.38

[2.96, 3.81]

Intramuscular fat

0.31

[0.16, 0.48]

0.34

[0.16, 0.54]

0.25

[0.08, 0.43]

0.82

[0.46, 1.00]

0.05

[0.05, 0.06]

0.07

[0.06, 0.08]

  1. h 2 A  = purebred heritability
  2. t 2 iC  = ratio of variance of the parental allelic contribution in the crossbreds (i = AB for Piétrain and Large White line, respectively) computed as 2σ 2 iC /σ 2 C where σ 2 iC is the additive genetic variance of the corresponding parental alleles in the crossbreds
  3. rg A, AC  = genetic correlation between purebred individual and sire line contribution in the crossbreds
  4. p 2 j  = ratio of variance of common pen effect
  5. σ 2 j  = phenotypic variances (j = AC for purebred Piétrain and crossbred, respectively)