TABLE 5

Percentage of times that the correct location of the QTL was identified for various selection strategies when 2% of 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
RAN11.011.716.741.411.914.218.748.3
STD19.6*37.951.5*76.7*26.6*49.766.5*82.9*
BAL20.8*34.951.0*72.620.640.764.9*81.3
DIS1014.933.937.766.516.036.848.775.4
DIS2019.5*42.7*49.7*75.8*21.445.261.184.1*
DIS5017.736.651.3*75.9*22.044.964.6*83.9*
CON514.827.827.950.717.733.735.357.3
CON1016.735.035.261.321.545.343.071.6
CON2521.0*42.8*41.768.125.4*54.4*53.879.1

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.