View Full Table | Close Full ViewTable 1.

Summary statistics for the traits1 included in the dataset

 
Trait No. records Mean SD Minimum Maximum
ADG30 17,817 377.9 39.02 294.7 586.2
ADG100 18,966 946.0 110.0 571.1 1,307
FCR 1,102 2.390 0.207 1.580 3.310
MP 18,966 61.90 1.060 56.20 65.70
TBN 35,715 13.56 3.832 1.000 28.00
LP5 34,991 10.47 3.453 0.000 22.00
SV5 34,991 0.780 0.188 0.000 1.000
Skatole 5,937 0.197 0.145 0.020 2.860
Log(skatole) 5,937 –1.786 0.545 –3.912 1.051
Androstenone 920 1.080 0.985 0.010 10.60
Log(androstenone) 920 –0.191 0.712 –2.207 2.363
1Average daily gain from birth to 30 kg BW (ADG30), ADG from 30 to 100 kg BW (ADG100), feed conversion ratio (FCR), meat percentage (MP), total number born (TBN), live piglets at d 5 (LP5), and survival rate until d 5 (SV5).



View Full Table | Close Full ViewTable 2.

Heritability of Log(skatole) and Log(Andro-stenone), growth traits (ADG from birth to 30 kg BW [ADG30] and ADG from 30 to 100 kg [ADG100]), meat percentage (MP), and feed conversion ratio (FCR) and additive genetic correlations with boar taint compounds estimated from pairwise bivariate animal model analyses1

 
Trait h2 l2 Genetic correlations
Log(skatole) Log(androstenone)
Log(skatole) 0.33 ± 0.05 0.05 ± 0.02 1.00 0.37 ± 0.15
Log(Androstenone) 0.59 ± 0.14 0.03 ± 0.06 0.37 ± 0.15 1.00
ADG30 0.22 ± 0.03 0.17 ± 0.01 0.26 ± 0.11 0.28 ± 0.15
ADG100 0.30 ± 0.03 0.04 ± 0.01 –0.06 ± 0.09 0.03 ± 0.12
MP 0.48 ± 0.03 0.03 ± 0.01 –0.22 ± 0.08 –0.13 ± 0.11
FCR 0.17 ± 0.08 0.02 ± 0.05 0.24 ± 0.19 0.06 ± 0.27
1l2 = ratio of litter variance to phenotypic variance



View Full Table | Close Full ViewTable 3.

Heritabilities of traits1, genetic correlations (above diagonal) and phenotypic correlations (below diagonal; ±SE) among growth traits, feed conversion ratio, meat percentage, and boar taint compounds

 
Item ADG30 ADG100 FCR MP Log(skatole) Log(androstenone)
Heritability 0.22 ± 0.03 0.30 ± 0.03 0.16 ± 0.07 0.48 ± 0.03 0.33 ± 0.04 0.59 ± 0.14
Trait
    ADG30 0.25 ± 0.07 –0.19 ± 0.21 –0.13 ± 0.07 0.17 ± 0.09 0.28 ± 0.13
    ADG100 0.09 ± 0.01 –0.04 ± 0.18 –0.42 ± 0.05 –0.04 ± 0.08 0.10 ± 0.11
    FCR –0.04 ± 0.04 –0.32 ± 0.03 –0.24 ± 0.16 0.18 ± 0.19 –0.04 ± 0.26
    MP –0.01 ± 0.01 –0.27 ± 0.01 –0.10 ± 0.03 –0.20 ± 0.07 –0.18 ± 0.10
    Log(skatole) 0.02 ± 0.02 –0.01 ± 0.02 0.04 ± 0.04 –0.12 ± 0.02 0.35 ± 0.14
    Log(androstenone) 0.08 ± 0.04 0.05 ± 0.04 0.14 ± 0.10 –0.15 ± 0.03 0.25 ± 0.03
1Average daily gain from birth to 30 kg BW (ADG30), ADG from 30 to 100 kg BW (ADG100), feed conversion ratio (FCR), and meat percentage (MP).



View Full Table | Close Full ViewTable 4.

The proportion of phenotypic variance that is due to sow and genetic effects on litter size traits1 and direct animal genetic effects on boar taint compounds are presented in bold on the diagonal. Genetic correlations between litter size traits and boar taint compounds are presented below the diagonal.

 
Four-trait model2 TNB LP5 Log(skatole) Log(Androstenone)
TNB 0.09 ± 0.01
LP5 0.57 ± 0.06 0.06 ± 0.01
Log(skatole) 0.06 ± 0.11 0.05 ± 0.13 0.33 ± 0.05
Log(Androstenone) –0.12 ± 0.15 –0.18 ± 0.18 0.41 ± 0.14 0.59 ± 0.14
Three-trait model2 SV5 Log(skatole) Log(Androstenone)
SV5 0.09 ± 0.01
Log(skatole) 0.01 ± 0.12 0.33 ± 0.05
Log(Androstenone) 0.03 ± 0.17 0.42 ± 0.14 0.59 ± 0.14
1Total number born (TBN), live piglets at d 5 (LP5), and survival rate until d 5 (SV5) = LP5/TNB.
2Estimation of genetic and environmental parameters for litter size and boar taint traits were performed in 4-trait [TNB, LP5, Log(skatole), and Log(androstenone)] or 3-trait [SV5, Log(skatole), and Log(androstenone)] linear mixed model analyses.