TABLE 6

Percentage of times that the correct location of the QTL was identified for various selection strategies when 30% individuals expressed the less common dichotomous phenotype

Frequency of positive QTL alleles (%)
0.10≈0.20
h2 = 0.05h2 = 0.30h2 = 0.05h2 = 0.30
StrategyQTL variance:0.100.300.100.300.100.300.100.30
RAN10.620.226.950.814.925.737.5*65.5
STD13.019.424.849.915.529.039.6*65.1
BAL11.521.629.249.814.726.238.4*64.8
DIS1014.530.032.7*53.916.730.241.3*63.3
DIS2016.1*28.833.4*59.8*15.233.340.6*67.3*
DIS5013.924.034.2*57.0*15.029.641.4*69.2*
CON515.0*26.716.432.217.032.919.139.3
CON1017.3*31.321.442.120.240.626.651.4
CON2517.8*37.3*26.349.726.2*48.5*34.661.7

Numbers in italics indicate the most precise strategy and asterisks indicate the strategies that did not differ significantly (P < 0.05) from the best strategy. RAN, random genotyping; STD, selective genotyping; BAL, genotyping equal numbers of discordant pairs per sire; DISn, discordant sib selection with n = 10, 20, or 50 half-sib families; CONn, concordant sib selection with 5, 10, or 25 high and low sires.