Theoretical and Applied Genetics

, Volume 120, Issue 1, pp 85–91

Development, polymorphism, and cross-taxon utility of EST–SSR markers from safflower (Carthamus tinctorius L.)

  • Mark A. Chapman
  • John Hvala
  • Jason Strever
  • Marta Matvienko
  • Alexander Kozik
  • Richard W. Michelmore
  • Shunxue Tang
  • Steven J. Knapp
  • John M. Burke
Original Paper


Due to their highly polymorphic and codominant nature, simple-sequence repeat (SSR) markers are a common choice for assaying genetic diversity and genetic mapping. In this paper, we describe the generation of an expressed-sequence tag (EST) collection for the oilseed crop safflower and the subsequent development of EST–SSR markers for the genetic analysis of safflower and related species. We assembled 40,874 reads into 19,395 unigenes, of which 4,416 (22.8%) contained at least one SSR. Primer pairs were developed and tested for 384 of these loci, resulting in a collection of 104 polymorphic markers that amplify reliably across 27 accessions (3 species) of the genus Carthamus. These markers exhibited a high level of polymorphism, with an average of 6.0 ± 0.4 alleles per locus and an average gene diversity of 0.54 ± 0.03 across Carthamus species. In terms of cross-taxon transferability, 50% of these primer pairs produced an amplicon in at least one other species in the Asteraceae, and 28% produced an amplicon in at least one species outside the safflower subfamily (i.e., lettuce, sunflower, and/or Gerbera). These markers represent a valuable resource for the genetic analysis of safflower and related species, and also have the potential to facilitate comparative map-based analyses across a broader array of taxa within the Asteraceae.

Supplementary material

122_2009_1161_MOESM1_ESM.xls (64 kb)
Supplementary material 1 (XLS 64 kb)


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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Mark A. Chapman
    • 1
  • John Hvala
    • 1
  • Jason Strever
    • 1
  • Marta Matvienko
    • 2
  • Alexander Kozik
    • 2
  • Richard W. Michelmore
    • 2
  • Shunxue Tang
    • 3
  • Steven J. Knapp
    • 3
  • John M. Burke
    • 1
  1. 1.Department of Plant BiologyUniversity of GeorgiaAthensUSA
  2. 2.Department of Plant Sciences, The Genome CenterUniversity of CaliforniaDavisUSA
  3. 3.Center for Applied Genomic TechnologiesUniversity of GeorgiaAthensUSA

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