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Related Experiment Videos

Simple sequence repeat map of the sunflower genome.

S. Tang1, J.-K. Yu, B. Slabaugh

  • 1Department of Crop and Soil Science, Oregon State University, Corvallis, OR 97331 USA.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik
|February 13, 2003
PubMed
Summary

Researchers developed a dense molecular genetic map for sunflower using simple sequence repeat (SSR) markers. This new map integrates previous genetic data and provides a foundation for future sunflower genetic studies.

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Area of Science:

  • Plant Genetics
  • Molecular Biology
  • Genomics

Background:

  • Existing sunflower genetic maps are fragmented and lack integration due to limited public DNA markers.
  • Comparisons between maps are difficult due to varied nomenclature and absence of common markers.

Purpose of the Study:

  • To construct a dense molecular genetic linkage map for cultivated sunflower (Helianthus annuus L.).
  • To utilize simple sequence repeat (SSR) markers for enhanced genetic mapping.

Main Methods:

  • Developed 879 SSR markers from genomic DNA libraries.
  • Screened 1,000 SSR primer pairs, identifying 579 polymorphic markers.
  • Constructed the genetic map using 94 recombinant inbred lines and 408 polymorphic SSR markers.

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Main Results:

  • A genetic map of 1,368.3 cM was created with 459 SSR marker loci organized into 17 linkage groups.
  • The map achieved a mean density of 3.1 cM per locus.
  • 579 newly developed SSR markers were found to be polymorphic in elite inbred lines.

Conclusions:

  • The developed SSR markers provide a substantial resource for sunflower genetic mapping.
  • This research establishes a basis for unifying and cross-referencing existing sunflower genetic maps.
  • Facilitates future genetic studies in both wild and cultivated sunflower populations.