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Consomic rat model systems for physiological genomics.

A W Cowley1, M Liang, R J Roman

  • 1Department of Physiology, Medical College of Wisconsin, Milwaukee 53226, USA.

Acta Physiologica Scandinavica
|July 31, 2004
PubMed
Summary
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Consomic rat strains, with chromosomes from one strain bred into another, are valuable tools for genetic research. These models allow detailed study of gene function and disease mechanisms in a reproducible manner.

Area of Science:

  • Genetics
  • Animal Models
  • Physiology

Background:

  • Consomic rat strains involve introgressing an entire chromosome into an isogenic background.
  • Marker-assisted selection is used for their development.
  • Two consomic rat panels on two genetic backgrounds (44 strains) are under development.

Purpose of the Study:

  • To develop and physiologically screen consomic rat panels.
  • To enable trait and quantitative trait loci (QTL) assignment to chromosomes.
  • To facilitate the study of gene function and complex disease mechanisms.

Main Methods:

  • Development of consomic rat panels.
  • Physiological screening of these panels.
  • Utilizing consomic strains for genetic linkage studies and QTL positional mapping.

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Main Results:

  • Consomic strains allow precise trait and QTL assignment to specific chromosomes.
  • They facilitate the rapid development of congenic strains.
  • These models overcome limitations of traditional segregating crosses for genetic studies.

Conclusions:

  • Consomic rat strains are a unique resource for understanding gene regulation and complex diseases.
  • They enable replicative and longitudinal physiological studies.
  • They provide essential inbred control strains for accurate physiological comparisons and assessing genomic impacts.