- Monday, March 16, 2009
- Linkage disequilibrium fine mapping of quantitative trait loci: a simulation study
- Published at:Genet. Sel. Evol. 35 (2003) 513–532
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Abstract – Recently, the use of linkage disequilibrium (LD) to locate genes which affect
quantitative traits (QTL) has received an increasing interest, but the plausibility of fine mapping
using linkage disequilibrium techniques for QTL has not been well studied. Themain objectives
of thiswork were to (1)measure the extent and pattern of LD between a putativeQTL and nearby
markers in finite populations and (2) investigate the usefulness of LD in fine mapping QTL in
simulated populations using a dense map of multiallelic or biallelic marker loci. The test of
association between amarker and QTL and the power of the test were calculated based on singlemarker regression analysis. The results show the presence of substantial linkage disequilibrium with closely linked marker loci after 100 to 200 generations of random mating. Although the power to test the association with a frequent QTL of large effect was satisfactory, the power was low for the QTL with a small ef -