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Related Experiment Videos

Simple sequence repeats for germplasm analysis and mapping in maize

G Taramino1, S Tingey

  • 1Agricultural Products Department, E.I. du Pont de Nemours and Co. (Inc.), Wilmington, DE 19880-0402, U.S.A.

Genome
|April 1, 1996
PubMed
Summary

Simple sequence repeats (SSRs) offer high polymorphism for DNA analysis. This study demonstrates their utility in corn genetic mapping and germplasm analysis, showing comparable information content to RFLP markers.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Bioinformatics

Background:

  • Simple sequence repeats (SSRs) are highly polymorphic DNA markers.
  • SSR markers are easily analyzed using polymerase chain reaction (PCR).
  • SSR utility for genetic mapping and germplasm analysis requires investigation.

Purpose of the Study:

  • To establish the utility of SSR markers for genetic mapping in corn.
  • To analyze corn germplasm using SSR markers.
  • To compare the information content and stability of SSRs with RFLP markers.

Main Methods:

  • Construction and screening of corn genomic libraries for SSRs.
  • Isolation and characterization of dinucleotide and trinucleotide repeats.
  • Analysis of SSR marker polymorphism in 12 corn inbred lines.

Related Experiment Videos

  • Comparison of SSR heterozygosity with RFLP markers.
  • Segregation analysis of SSRs in a mapping population.

    • Main Results:

    • 34 SSR clones (15 AG, 15 AC, 4 trinucleotide) were analyzed.
    • SSR markers showed high polymorphism in corn inbred lines.
    • SSR markers exhibited comparable expected heterozygosity to RFLP markers.
    • SSR stability was confirmed through segregation analysis.

    Conclusions:

    • SSR markers are valuable tools for corn genetic mapping.
    • SSRs provide high information content for corn germplasm analysis.
    • SSR markers demonstrate stability and high polymorphism, suitable for genetic studies.