RGD Reference Report - Interaction between blood pressure quantitative trait loci in rats in which trait variation at chromosome 1 is conditional upon a specific allele at chromosome 10. - Rat Genome Database

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Interaction between blood pressure quantitative trait loci in rats in which trait variation at chromosome 1 is conditional upon a specific allele at chromosome 10.

Authors: Monti, J  Plehm, R  Schulz, H  Ganten, D  Kreutz, R  Hubner, N 
Citation: Monti J, etal., Hum Mol Genet 2003 Feb 15;12(4):435-9.
RGD ID: 629620
Pubmed: PMID:12566390   (View Abstract at PubMed)

We have used inbred and congenic rat strains in F(2) segregation studies to discover epistasis in a polygenic model of hypertension. Previously, we have found evidence that the presence of a blood pressure quantitative trait locus (QTL) on chromosome 1 is conditional upon the allele status of chromosome 10. To prove the existence of an epistatic interaction we have analyzed congenic strains for chromosome 1 and 10 carrying high blood pressure QTL alleles from the spontaneously hypertensive rat on a normotensive background of the Wistar-Kyoto (WKY) rat. Additionally, a double congenic strain was developed with both chromosome 1 and 10 high blood pressure QTL alleles on the WKY background. Analysis of variance for blood pressure phenotypes as determined by radiotelemetry showed a significant effect for chromosome 10 but not chromosome 1 QTL alleles and demonstrated a significant interaction between the two loci (P<0.05). The interaction accounted for 5 mmHg of blood pressure. Thus, the identification of epistasis is critical to the understanding of the quantitative nature of blood pressure genetics.



Disease Annotations    
hypertension  (IDA)


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Objects Annotated

QTLs
Bp106  (Blood pressure QTL 106)
Bp107  (Blood pressure QTL 107)

Objects referenced in this article
Strain WKY.SHRSP-(Shbg-Atp1b2)/Bbb null Rattus norvegicus

Additional Information