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Table 2 Estimates of QTL allele substitution effect (), location and efficiency of selection in BC1 and BC4 when frequency of favourable QTL allele in donor line varied and N = 1000 (se are in italic font).

From: Combined detection and introgression of QTL in outbred populations

α b Locationc Efficiency of selection
  BC1 BC4 BC1 BC4 BC1 BC4
p(Q d ) = 1.00
2.23 2.23 ± 0.02 2.21 ± 0.01 84.8 ± 0.1 85.0 ± 0.0 1.00 ± 0.00 0.99 ± 0.00
1.48 1.49 ± 0.02 1.47 ± 0.01 85.1 ± 0.2 85.0 ± 0.1 0.99 ± 0.00 0.99 ± 0.00
1.02 0.99 ± 0.02 0.96 ± 0.02 83.0 ± 1.5 82.8 ± 1.5 0.99 ± 0.00 0.98 ± 0.00
p(Q d ) = 0.90
2.23 2.04 ± 0.02 2.00 ± 0.01 85.0 ± 0.1 85.1 ± 0.1 0.90 ± 0.00 0.90 ± 0.00
1.48 1.35 ± 0.02 1.32 ± 0.01 84.8 ± 0.2 84.9 ± 0.1 0.89 ± 0.00 0.89 ± 0.00
1.02 0.95 ± 0.02 0.92 ± 0.01 85.1 ± 0.4 85.0 ± 0.1 0.89 ± 0.00 0.88 ± 0.00
p(Q d ) = 0.75
2.23 1.67 ± 0.02 1.64 ± 0.01 84.9 ± 0.3 85.0 ± 0.1 0.75 ± 0.00 0.74 ± 0.00
1.48 1.12 ± 0.02 1.09 ± 0.01 84.9 ± 0.3 85.1 ± 0.1 0.74 ± 0.00 0.73 ± 0.00
1.02 0.80 ± 0.02 0.76 ± 0.01 84.1 ± 0.7 84.9 ± 0.2 0.72 ± 0.01 0.72 ± 0.00
p(Q d ) = 0.50
2.23 1.14 ± 0.02 1.09 ± 0.01 84.3 ± 0.5 85.0 ± 0.1 0.50 ± 0.00 0.49 ± 0.00
1.48 0.76 ± 0.02 0.72 ± 0.01 82.3 ± 0.2 85.0 ± 0.2 0.48 ± 0.01 0.48 ± 0.01
1.02 0.57 ± 0.02 0.51 ± 0.01 81.2 ± 1.4 85.2 ± 0.4 0.48 ± 0.01 0.47 ± 0.01
  1. a Marker frequencies and QTL frequencies were identical in the donor line
  2. b True QTL allele substitution effect; allele substitution effects of 2.23, 1.48 and 1.02 correspond to heritability values of 0.50, 0.31 and 0.17, respectively
  3. c True QTL location corresponds to interval 85