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Related Experiment Videos

Interspecific evolution in plant microsatellite structure.

M Barrier1, E Friar, R Robichaux

  • 1Department of Genetics, Box 7614, North Carolina State University, Raleigh, NC 27695, USA.

Gene
|December 23, 1999
PubMed
Summary
This summary is machine-generated.

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Intragenic microsatellites in floral genes ASAP1 and ASAP3/TM6 were found in Madiinae species. These microsatellite loci are hotspots for formation and evolution, driven by mutations.

Area of Science:

  • Plant genetics
  • Molecular evolution
  • Asteraceae family studies

Background:

  • Floral regulatory genes like APETALA1 and APETALA3 play crucial roles in plant development.
  • Microsatellites are repetitive DNA sequences that can be highly variable and useful in genetic studies.
  • The Madiinae subtribe (Asteraceae) offers a diverse system for investigating evolutionary processes.

Purpose of the Study:

  • To identify and characterize intragenic microsatellites within floral regulatory genes in Madiinae species.
  • To investigate the distribution and potential hotspots of microsatellite formation in these genes.
  • To trace the evolutionary history and structural changes of identified microsatellite loci.

Main Methods:

  • DNA sequencing of floral regulatory genes (ASAP1 and ASAP3/TM6) from 17 Madiinae species.

Related Experiment Videos

  • Bioinformatic analysis to identify and quantify microsatellite loci within gene introns.
  • Phylogenetic mapping of microsatellite sequences to analyze their evolutionary patterns.

    • Main Results:

    • Discovery of 39 microsatellite loci within the introns of ASAP1 and ASAP3/TM6 genes.
    • Identification of these genes as potential hotspots for microsatellite formation.
    • Evidence suggesting that nucleotide substitutions and indel mutations drive microsatellite evolution.

    Conclusions:

    • Intragenic microsatellites are prevalent in the studied floral regulatory genes of Madiinae.
    • The identified microsatellites provide valuable markers for population genetics and evolutionary studies within the Asteraceae family.
    • Understanding microsatellite evolution sheds light on genome plasticity and the dynamics of repetitive DNA elements.