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Related Experiment Videos

Recombination and genetic polymorphism at the mouse alpha-globin locus

J B Lewis1, R R Cobb, J B Whitney

  • 1Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta 30912-2100.

Genomics
|November 1, 1993
PubMed
Summary

A recombination event occurred in the mouse alpha-globin gene region of strain AKXL-7. This finding, identified using restriction fragment length polymorphisms (RFLPs), pinpoints a crossover between adult alpha-globin genes.

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Area of Science:

  • Genetics
  • Genomics
  • Molecular Biology

Background:

  • The mouse alpha-globin gene cluster is crucial for oxygen transport.
  • Recombinant inbred (RI) mouse strains are valuable tools for genetic mapping.
  • Understanding gene region evolution requires precise identification of genetic events.

Purpose of the Study:

  • To investigate a suspected recombination event in the alpha-globin gene region of the AKXL-7 mouse strain.
  • To determine the parental origins of chromosome segments in AKXL-7 using RFLPs.
  • To refine the location of the crossover event within the alpha-globin locus complex.

Main Methods:

  • Utilized restriction fragment length polymorphisms (RFLPs) to analyze DNA from AKXL-7 and parental strains (AKR, C57L).
  • Performed Southern blot analysis to assess parental origins of chromosome 11 segments.

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  • Employed an intergenic region probe to narrow down the crossover site.

    • Main Results:

    • Confirmed a recombination event within the AKXL-7 mouse strain's alpha-globin gene region.
    • Demonstrated that flanking regions of AKXL-7 Chromosome 11 originated from different parental chromosomes.
    • Localized the crossover event to a ~5.2 kb region between the tandem adult alpha-globin genes.

    Conclusions:

    • The AKXL-7 strain harbors a recent recombination event within the alpha-globin locus complex.
    • RFLPs are effective markers for dissecting genetic architecture in RI strains.
    • Further studies using RFLPs can aid in understanding mouse evolutionary relationships and strain differentiation.