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Comparative mapping between quercus and castanea using simple-sequence repeats (SSRs).

T Barreneche1, M Casasoli, K Russell

  • 1INRA, UMR Biodiversité Gènes et Ecosystèmes, 69 Route d'Arcachon, 33612, Cestas Cedex, Pierroton, France.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik
|October 18, 2003
PubMed
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Simple sequence repeat (SSR) markers enable comparative mapping between Quercus and Castanea. This research identified transferable SSR markers, establishing homeology between linkage groups for future studies in the Fagaceae family.

Area of Science:

  • Genetics
  • Plant Biology
  • Genomics

Background:

  • Comparative mapping is crucial for understanding genome evolution in closely related plant species.
  • Simple sequence repeat (SSR) markers offer high polymorphism and are widely used in genetic mapping.

Purpose of the Study:

  • To assess the transferability of SSR markers between Quercus and Castanea.
  • To develop comparative genetic maps between Quercus robur and Castanea sativa.
  • To identify orthologous loci for inter-generic mapping within the Fagaceae family.

Main Methods:

  • Developed and tested SSR markers from Quercus and Castanea for cross-species amplification.
  • Integrated transferable SSRs into existing genetic linkage maps.
  • Sequenced SSR loci to confirm marker orthology.

Related Experiment Videos

  • Determined homeology between linkage groups using common markers.

    • Main Results:

    • 47% of Quercus SSRs and 63% of Castanea SSRs were transferable between genera.
    • 19 SSR markers (15 from Quercus, 4 from Castanea) served as comparative anchor tags.
    • Homeology was established between seven linkage groups, with two additional groups matched by single markers.

    Conclusions:

    • Transferable SSRs are valuable tools for comparative mapping in the Fagaceae family.
    • Identified orthologous loci provide a foundation for integrating genetic maps across related genera.
    • This study facilitates a deeper understanding of genome organization and evolution in oaks and chestnuts.