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Table 2 Estimation of QTL positions and main effects with Models I, II and III a

From: A new mapping method for quantitative trait loci of silkworm

QTLb Chr. Pos. A D Power
   Par. Est.( SD ) Par. Est.( SD ) Par. Est.( SD )    
    I II III   I II III   I II III I II III
Q1 1 44 44.02 (3.14) 44.07 (3.43) 44.02 (3.14) 3.88 3.88 (0.38) 3.92 (0.52) 3.91 (0.43) -2.3 -2.21 (0.53) -2.27 (0.73) -2.22 (0.60) 96.7 93.3 96.7
Q2 2 45 45.20 (4.09) 45.36 (5.40) 45.20 (4.09) -2.4 -2.43 (0.42) -2.48 (0.54) -2.48 (0.48) 1.9 1.80 (0.51) 1.83 (0.76) 1.84 (0.61) 91 84.3 91
Q3 3 50 50.18 (2.13) 50.21 (3.27) 50.18 (2.13) 3.2 3.25 (0.38) 3.29 (0.48) 3.33 (0.44) 2.1 2.05 (0.52) 2.13 (0.74) 2.09 (0.61) 98.3 94.7 98.3
Q4 4 73 73.24 (4.23) 73.29 (5.77) 73.24 (4.23) -2.8 -2.67 (0.41) -2.74 (0.50) -2.71 (0.44) -1.9 -1.84 (0.53) -1.87 (0.73) -1.85 (0.60) 92 87.7 92
Q5 5 15 15.28 (6.40) 16.52 (7.94) 15.28 (6.40) 1.9 1.98 (0.36) 2.17 (0.52) 2.13 (0.42) 0 -0.01 (0.55) -0.09 (0.85) -0.08 (0.67) 62.7 49.7 62.7
Q6 2 75 - - - 0 - - - 0 - - - - - -
Q7 4 24 - - - 0 - - - 0 - - - - - -
  1. a Pos. (position): the distance (cM) between the QTL and the first marker on the same chromosome; A: additive effect; D: dominance effect; Chr. (chromosome): the chromosome on which the QTL is located; Power: the percentage of the QTL that is detected correctly to be significant at 0.05 and within the 95% confidence interval; Par. (parameter): the true parameter value in simulations; Est.: the estimate of parameter; SD: the standard deviation of the estimate from the true value that is listed in the parenthesis where applicable; I (Model I): model (1) (silkworm F2 model); II (Model II): the normal chiasmate F2 model; III(Model III): the reduced version of model (1) without all epistatic effects and their interaction effects with sex.
  2. b Q6 and Q7 are two QTLs without main effects, and thus could not been detected by the model of QTL main effects.