TABLE 4

Variance components associated with significant markers in two genetic backgrounds

Whole chromosomeBackcross chromosome
Variance componentaSBABSBAB
MC-22 (both sexes)
Marker0.1240.0030.0470.030
Total genetic0.4923.4950.3070.855
Percentage25.20.115.23.5
In R (females only)
Marker0.0000.9880.0240.536
Total genetic0.3714.4070.2501.299
Percentage0.022.49.741.3
Large insertions (averaged over sexes)
Marker0.0770.0390.0150.157
Total genetic0.4773.5440.2970.951
Percentage16.11.15.116.5
• a Variance components were estimated using the VARCOMP procedure of SAS and then set equal to their expectations under a strictly additive model of quantitative variation. Negative variance components were set equal to zero to calculate variance due to each marker and the total genetic variance.