Mapping Data

Experiment

• Experiment
  TEXT-QTL
• Chromosome
  16
• Reference
  J:142770 Stylianou IM, et al., Differences in DBA/1J and DBA/2J reveal lipid QTL genes. J Lipid Res. 2008 Nov;49(11):2402-13
• ID
  MGI:3828434

Genes

Gene	Assay Type
Tgq28	visible phenotype
Hdlq65	visible phenotype

Notes

• Experiment
  Linkage analysis was performed using a backcross derived from closely related inbred strains DBA/1J and DBA/2J. The genetic composition of these 2 inbred strains differs by just 5.6% at the SNP level. A total of 294 mice from (DBA/1J x DBA/2J)F1 x DBA/1Jand (DBA/1J x DBA/2J)F1 x DBA/2J populations were screened for 6,949 polymorphic SNP markers. Backcross mice were placed on a high-fat diet at 8 weeks of age and phenotyped for plasma triglyceride and HDL concentrations at 8, 11 and 16 weeks of age. Parental strain DBA/2J displays significantly increased plasma triglyceride concentrations on a CHOW diet compared to parental strain DBA/1J. Male DBA/2J animals display significantly increased plasma triglyceride and HDL concentrations after an 8 week high fat diet compared to DBA/1J males.
  
  Linkage to plasma triglyceride levels on a CHOW diet (LOD=3.5), 3 week high fat diet (LOD=5.5), and 8 week high fat diet (LOD=3.9) mapped to 40 cM on mouse Chromosome 16 at peak marker rs4210264 (80.19 Mb). This male-specific locus is named Tgq28 (triglyceride QTL 28). DBA/2J-derived alleles at Tgq28 confer increased plasma triglyceride concentration in males. [Table 2 and 3].
  
  Significant linkage to plasma HDL cholesterol concentration on a CHOW diet mapped to 39 cM (LOD=3.9) and is named Hdlq65 (HDL QTL 65). This locus is also suggestive for plasma HDL concentration on a 3-week high fat diet. [Table 2].