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Related Experiment Videos

A human-horse comparative map based on equine BAC end sequences.

Tosso Leeb1, Claus Vogl, Baoli Zhu

  • 1Institute of Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559 Hannover, Germany. Tosso.Leeb@itz.unibe.ch

Genomics
|April 11, 2006
PubMed
Summary
This summary is machine-generated.

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Researchers generated 9473 horse BAC end sequences (BESs) to enhance the equine genome map. These sequences anchored 3079 clones to the human genome, aiding comparative mapping and gene content prediction.

Area of Science:

  • Genomics
  • Comparative Genomics
  • Bioinformatics

Background:

  • High-density genetic maps are crucial for understanding genome organization and evolution.
  • Existing sequence-based markers for the horse genome require increased density for comprehensive analysis.

Purpose of the Study:

  • To generate a higher density of sequence-based markers for the horse genome.
  • To establish anchors for comparative mapping between horse and human genomes.
  • To facilitate in silico prediction of equine gene content and chromosome assignment.

Main Methods:

  • Generated 9473 Bacterial Artificial Chromosome (BAC) end sequences (BESs) from the CHORI-241 BAC library.
  • Performed BLASTN searches of BESs against the human genome to identify homologous sequences.

Related Experiment Videos

  • Anchored equine BAC clones to the human genome based on BLASTN hits.
  • Utilized anchored BESs for in silico gene content prediction and chromosome assignment.
  • Verified the in silico mapping strategy using Radiation Hybrid (RH) mapping for selected equine markers.

    • Main Results:

    • Generated 9473 horse BESs with an average read length of 677 bp.
    • Identified 4036 significant BLASTN hits (E ≤ 10^-5) in the human genome.
    • Anchored 3079 equine BAC clones to the human genome, achieving approximately one anchor per megabase.
    • Successfully predicted gene content and chromosome assignments for equine BAC clones.
    • Validated the in silico mapping by assigning 19 equine BESs to predicted locations on the RH map, confirming assignments to ECA10, ECA20, and ECA31.

    Conclusions:

    • The generation of BAC end sequences significantly increases the density of sequence-based markers for the horse genome.
    • The human genome serves as a valuable resource for anchoring equine BAC clones and facilitating comparative mapping.
    • In silico prediction based on comparative genomics is a viable strategy for assigning gene content and chromosomal locations to equine BAC clones.
    • This approach provides a foundation for a more refined equine genome map and aids in understanding horse-human genomic relationships.