Bw18^A/J
QTL Variant Detail

Summary

• QTL variant: Bw18^A/J
• Name: body weight QTL 18; A/J
• MGI ID: MGI:2156445
• QTL: Bw18 Location: Chr6:83690851-83691013 bp Genetic Position: Chr6, cM position of peak correlated region/allele: 35.94 cM
• QTL Note: genome coordinates based on the marker associated with the peak LOD score

Variant origin

• Strain of Specimen: A/J

Variant description

• Allele Type: QTL
• Mutation: Undefined
• This allele confers increased body weight in male animals compared to SM/J. (J:64138)
• Inheritance: Not Specified

Expression

In Structures Affected by this Mutation:

1 anatomical structure(s)

Notes

Candidate Genes

J:91835

The correlation between gene expression and dietary interaction was examined in a population of (BALB/cStCrlfC3H/Nctr x VY/WffC3Hf/Nctr-A(vy)/a)F1 animals. A/a and A/A^vy animals were placed on a 70% (calorie restricted) or 100% (non-restricted) diet andliver mRNA levels were assessed for over 18,000 genes using DNA microarrays. Twenty-eight known genes showing statistically significant differential expression between the 70% and 100% calorie diets and A/a and A/A^vy genotypes mapped near known diabesity QTLs. These genes may be considered further for candidate genes.

On mouse Chromosome 6, Smo (7.2 cM) and Flnc (8.5 cM) both show differential expression between restricted and unrestricted diets on the A/a background as well as differential expressionbetween A/a and A/A^vy animals on the restricted diet. D6Wsu176e (2 cM) shows differential expression between restricted and unrestricted diets on the A/A^vy background. Diabesity QTLs Fglu (16 cM), Mob2 (3.05 cM), and Bwtq3 (4 cM) maps near these candidate genes. Candidate genes for diabesity QTLs Nidd3n (35.5 cM), Obq13 (26.8 cM), Obq14 (43.5 cM), and Bw18 (35 cM) are Mad2l1 (30.3 cM) and Rab11fip5 (35.5 cM, formerly ERATO DOI 32e). Mad2l1 shows differential expression between A/a and A/A^vy animalsonboth the restricted and unrestricted diets. Rab11fip5 shows differential expression between A/a and A/A^vy animals on the restricted diet.

Mapping and Phenotype information for this QTL, its variants and associated markers

J:64138

The SMXA (SM/J x A/J) RI line was informative in mapping suggestive QTLs for Body Weight, Insulin, Triglyceride and Phospholipid in selected RI strains. In Male mice a body weight QTL (Bw18) was associated with D6Mit8 on mouse Chromosome 6.

References

• Original: J:64138 Anunciado RV, et al., Distribution of body weight, blood insulin and lipid levels in the SMXA recombinant inbred strains and the QTL analysis. Exp Anim. 2000 Jul;49(3):217-24
• All: 1 reference(s)