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Related Experiment Videos

Mutation rate at swine microsatellite loci.

Gen Hua Yue1, Petra Beeckmann, Hermann Geldermann

  • 1Department of Animal Breeding and Biotechnology, University of Hohenheim, Stuttgart, Germany. genhua@ima.org.sg

Genetica
|June 4, 2002
PubMed
Summary

Microsatellite mutation rates in swine were analyzed, revealing an overall rate of 7.52 x 10(-5) per locus per generation. Expansions were more common than contractions, indicating complex mutation processes.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Animal Breeding

Background:

  • Microsatellites are valuable genetic markers for quantitative trait loci (QTL) mapping.
  • Understanding microsatellite mutation rates is crucial for accurate genetic analysis in livestock.

Purpose of the Study:

  • To determine the mutation rate of microsatellites in F2 swine populations.
  • To investigate factors influencing microsatellite mutation rates.
  • To characterize the nature of microsatellite mutations.

Main Methods:

  • Genotyping of 38 microsatellites across three F2 swine populations.
  • Analysis of 66,436 parent-offspring transfers for microsatellite alleles.
  • Sequencing of detected mutant alleles.

Main Results:

  • An overall microsatellite mutation rate of 7.52 x 10(-5) per locus per generation was observed.
  • No significant association was found between mutation rates and GC content, heterozygosity, or repeat number.
  • Mutations primarily involved repeat expansions, with insertions being more frequent than contractions.

Conclusions:

  • Microsatellite mutation processes are complex and do not strictly follow the stepwise mutation model.
  • Mutation rates can vary significantly between different microsatellite loci.
  • Expansion events are more prevalent than contraction events in swine microsatellites.

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