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http://dx.doi.org/10.5808/GI.2009.7.3.152

Localization of Quantitative Trait Loci for Bone Mineral Density on Chromosome 13 in the Mongolian Population  

Seo, Soo-Hyun (Genomic Medicine Institute, Medical Research Center, Seoul National University)
Lim, Hae-Jeng (Genomic Medicine Institute, Medical Research Center, Seoul National University)
Ahn, Se-Jin (Genomic Medicine Institute, Medical Research Center, Seoul National University)
Lee, Joseph (Taub Institute, Columbia University Medical Center)
Kim, Jong-Il (Medicine Institute, Medical Research Center, Seoul National University)
Publication Information
Genomics & Informatics / v.7, no.3, 2009 , pp. 152-158 More about this Journal
Abstract
Although the genetic basis for bone mineral density (BMD) has been studied by many groups so far, genes responsible for this complex trait has not been completely revealed. In order to localize quantitative trait loci (QTLs) for BMD variation in Asian population, the study was designed using a group of Mongolian population, a genetically closed population with a homogeneous lifestyle. BMD was measured at the left and right wrists and ankles using DEXA in 1,082 participants from 142 families. Genotyping of 13 polymorphic microsatellite markers on chromosome 13 (average spacing 8-9 cM) and two-point and multipoint linkage analysis were performed. In two-point linkage analysis, we identified two markers, D13S175 (6.03 cM) and D13S265 (68.73 cM) that had LOD scores greater than 1 for left ankle (LOD=2.09, LOD=1.49, respectively). We also found a marker D13S175 (6.03 cM) with a high LOD for left wrist (LOD=1.49) and the markers D13S265 (68.73 cM) and D13S217 (17.21 cM) for the right wrist (LOD= 1.82, LOD= 1.62, respectively). Among these significant marker regions, only two regions at 17 cM (13p11) and 65 cM (13q21) for the right wrist overlapped with major QTLs reported in following multipoint linkage analysis (LOD= 1.7549, LOD=1.4462, respectively). This study provides the possible evidence of the presence of QTLs affecting right wrist BMD in Mongolian populations on 13p11 and 13q21. Modest evidence was also found for genes affecting left ankle and left wrist BMD on 13p13.
Keywords
association analysis; bone density; linkage analysis; mongolian population; QTL;
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