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Isolation and mapping of polymorphic microsatellites in cattle

P Steffen1, A Eggen, A B Dietz

  • 1Department of Animal Science, Swiss Federal Institute of Technology, Zurich.

Animal Genetics
|April 1, 1993
PubMed
Summary
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Researchers identified eight bovine microsatellite loci using a (CA)n probe. Six loci were mapped using PCR, revealing significant genetic diversity for future cattle breeding applications.

Area of Science:

  • Genomics
  • Molecular Biology
  • Animal Genetics

Background:

  • Microsatellites, or simple sequence repeats (SSRs), are valuable genetic markers.
  • The (CA)n motif is a common microsatellite repeat found in many genomes.
  • Bovine genome research benefits from the development of new genetic markers.

Purpose of the Study:

  • To identify and characterize novel microsatellite loci in the bovine genome.
  • To develop new genetic markers for cattle.

Main Methods:

  • Screening of a partial bovine plasmid library using a (dC-dA)n.(dG-dT)n oligonucleotide probe.
  • Isolation and sequencing of positive clones containing (CA)n repeats.
  • Analysis of microsatellite allele numbers.
  • Polymerase Chain Reaction (PCR)-based mapping of microsatellites using somatic hybrid lines.

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Main Results:

  • Eleven positive clones containing the (CA)n motif were identified.
  • Eight microsatellite loci were analyzed, showing a range of 2 to 8 alleles.
  • Six of the identified microsatellites were successfully mapped to bovine chromosomes using PCR.

Conclusions:

  • The study successfully identified and characterized eight novel bovine microsatellite loci.
  • The developed microsatellites exhibit considerable polymorphism, indicating their utility in genetic studies.
  • The mapping of six loci provides a foundation for their use in cattle genetic research and breeding programs.