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A small-insert bovine genomic library highly enriched for microsatellite repeat sequences

R T Stone1, J C Pulido, G M Duyk

  • 1U.S. Department of Agriculture, ARS, Roman L. Hruska U.S. Meat Animal Research Center (MARC), Clay Center, Nebraska 68933-0166, USA.

Mammalian Genome : Official Journal of the International Mammalian Genome Society
|October 1, 1995
PubMed
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This study developed an enriched bovine genomic phagemid library, yielding a high percentage of informative microsatellite markers by eliminating common repetitive sequences. This method improves bovine genetic marker discovery.

Area of Science:

  • Genomics
  • Molecular Biology
  • Animal Genetics

Background:

  • Bovine microsatellite markers are crucial for genetic studies.
  • Previous methods faced challenges with repetitive sequences in bovine genomes.
  • Developing efficient marker discovery is essential for cattle breeding and research.

Purpose of the Study:

  • To construct and evaluate an enriched bovine genomic phagemid library for microsatellite marker production.
  • To compare the efficiency of this enriched library with traditional M13 bacteriophage libraries.
  • To identify and characterize informative bovine microsatellite markers.

Main Methods:

  • Construction of a bovine genomic phagemid library using randomly sheared DNA.
  • Enrichment of the library with CA or GT primers.

Related Experiment Videos

  • Sequencing of positive clones and comparison with M13 libraries.
  • Estimation of genomic frequency for tri- and tetranucleotide repeats.

    • Main Results:

    • Enrichment yielded 45% positive clones, with 14% meeting criteria for microsatellite markers.
    • 390 informative bovine microsatellite markers were identified with primer sequences and genotyping information.
    • Comparison indicated no bias in genomic coverage between enriched and M13 libraries.
    • Only specific repeats (GCT, GGT, GGAT) were found at high genomic frequency.

    Conclusions:

    • Enrichment of the bovine phagemid library is a sufficient method for producing informative microsatellite markers.
    • This approach effectively eliminates small repeat lengths and flanking repetitive sequences common in bovines.
    • The study provides a valuable resource of 390 informative bovine microsatellite markers.