Mapping quantitative trait loci for canine hip dysplasia in German Shepherd dogs

Mapping quantitative trait loci for canine hip dysplasia in German Shepherd dogs Canine hip dysplasia (CHD) is a common hereditary developmental disease of the coxofemoral joints. CHD is characterized by subluxation of the femoral head and deformation of the acetabulum leading to a painful osteoarthrosis. Analyses of mode of inheritance have shown the involvement of a major gene in expression of CHD in German Shepherd dogs. Thus, a whole genome scan for quantitative trait loci (QTL) was performed in German Shepherd dogs. For this purpose 11 paternal half-sib families, including a total of 459 purebred German Shepherd dogs with sires, dams, and offspring, were genotyped for 261 microsatellites. These markers were equidistantly distributed over all 38 autosomes and the X chromosome with an average marker distance of 11.7 cM. The mean observed heterozygosity of the marker set was 50%. The CHD status for the dogs was scored according to the official rules of the Fédération Cynologique Internationale. At the genome-wide level of significance at p < 0.05, QTL for CHD were located on nine different canine chromosomes: 1, 3, 4, 8, 9, 16, 19, 26, and 33. The minimal QTL regions containing the CHD genes spanned on average 5 Mb with a range between 1 and 8.2 Mb. Chromosome-wide level of significance at p < 0.05 was found for QTL on 19 chromosomes. Further analyses can now be performed to refine these map positions of QTL already identified in German Shepherd dogs. Mammalian Genome Springer Journals

Mapping quantitative trait loci for canine hip dysplasia in German Shepherd dogs

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Copyright © 2007 by Springer Science+Business Media, LLC
Life Sciences; Zoology ; Anatomy ; Cell Biology
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