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Related Experiment Videos

A rat genetic map constructed by representational difference analysis markers with suitability for large-scale typing

M Toyota1, F Canzian, T Ushijima

  • 1Carcinogenesis Division, National Cancer Center Research Institute, Tokyo, Japan.

Proceedings of the National Academy of Sciences of the United States of America
|April 30, 1996
PubMed
Summary

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Representational difference analysis (RDA) successfully identified 131 polymorphic markers in the rat genome. Genetically directed RDA further isolated specific markers, enhancing rat genetic mapping capabilities.

Area of Science:

  • Genetics
  • Molecular Biology
  • Genomics

Background:

  • The rat genome has a limited number of established chromosomal markers, hindering genetic studies.
  • Efficient methods are needed to identify polymorphic markers for high-resolution genetic mapping in rats.

Purpose of the Study:

  • To develop and apply Representational Difference Analysis (RDA) for isolating novel polymorphic markers in the rat genome.
  • To utilize genetically directed RDA to target specific chromosomal regions and enhance marker discovery.
  • To establish a foundation for improved quantitative trait loci (QTL) mapping in rats.

Main Methods:

  • Representational Difference Analysis (RDA) using restriction enzymes BamHI and HindIII with reciprocal subtraction between ACI and BUF rat strains.
  • Creation of a mapping panel from 105 ACI x BUF F2 rats for marker analysis.

Related Experiment Videos

  • Genetically directed RDA to isolate markers within the D1Ncc1 locus by manipulating F2 driver-DNA allele frequencies.
  • Dot blot analysis of amplified markers for high-throughput screening and validation.

    • Main Results:

    • Four series of RDA yielded 131 polymorphic markers, with 125 mapped to rat chromosomes (excluding X).
    • Genetically directed RDA successfully isolated four markers from the D1Ncc1 locus.
    • Dot blot analysis confirmed 25 out of 27 RDA markers as informative, hybridizing specifically with tester amplicons.
    • High-density dot blot analysis demonstrated the capacity for processing a large number of samples efficiently.

    Conclusions:

    • RDA is an effective technique for discovering polymorphic markers in the rat genome.
    • Genetically directed RDA provides a targeted approach for marker isolation in specific genomic regions.
    • The developed RDA markers and methods facilitate high-throughput sample processing for enhanced QTL mapping in rats.