Table 5

Evidence for QTL significant at the 5% chromosome-wide level for traits related to muscularity and meat quality by chromosome obtained by F2 analysis. Estimated significance levels (F-value), position, % of F2 variance explained by each QTL, and gene effects.
Trait
 SSC
 Position [cM]
 F-Value
 % Variance1
 Additive
Dominance





Effect2
 S.E.
 Effect2
 S.E.
pH24ML
 1
 21
 6.9*
 1.8
 -0.027
 0.007
 -0.003
 0.013
C1ML
 2
 56
 5.88*
 1.4
 0.146
 0.045
 0.098
 0.118
FOM
 3
 58
 7.9**
 2.1
 1.66
 0.49
 1.69
 0.78
MCOpto
 3
 0
 13.4****
 3.6
 -1.74
 0.35
 0.57
 0.51
FOM
 4
 80
 19.0****
 5.1
 3.21
 0.53
 0.06
 0.89
MAML
 4
 78
 13.8****
 3.7
 1.27
 0.25
 0.47
 0.42
pH24ML
 4
 90
 6.4*
 1.7
 -0.022
 0.007
 -0.021
 0.012
C1ML
 4
 26
 5.4*
 1.5
 0.021
 0.039
 -0.248
 0.076
MAML
 6
 175
 11.4***
 3.0
 -0.99
 0.23
 0.52
 0.35
C24ML
 6
 138
 6.1*
 1.5
 -0.273
 0.083
 -0.285
 0.184
pH1ML
 13
 76
 5.9*
 1.6
 0.038
 0.012
 0.021
 0.016
pH24ML
 15
 63
 5.7*
 1.5
 -0.031
 0.009
 0.026
 0.024
MCOpto
 15
 117
 8.0***
 2.2
 -1.27
 0.37
 -0.89
 0.50
pH24ML
 18
 66
 4.8*
 1.3
 -0.019
 0.007
 -0.250
 0.012

*: significant at the 5% chromosome-wide level, **: significant at the 1% chromosome-wide level, ***: significant at the 5% genome-wide level, ****: significant at the 1% genome-wide level

1the fraction of phenotypic variance in the F2 explained by a QTL; calculated as the proportion of residual variance of the statistical models with and without the QTL effect

2positive values of additive genetic and dominance effects imply higher trait values forced by the Duroc allele;

Wimmers et al. BMC Genetics 2006 7:15   doi:10.1186/1471-2156-7-15