Theoretical and Applied Genetics

, Volume 110, Issue 3, pp 550–560

Development and mapping of microsatellite (SSR) markers in wheat

  • Q. J. Song
  • J. R. Shi
  • S. Singh
  • E. W. Fickus
  • J. M. Costa
  • J. Lewis
  • B. S. Gill
  • R. Ward
  • P. B. Cregan
Original Paper

DOI: 10.1007/s00122-004-1871-x

Cite this article as:
Song, Q.J., Shi, J.R., Singh, S. et al. Theor Appl Genet (2005) 110: 550. doi:10.1007/s00122-004-1871-x

Abstract

Microsatellite DNA markers are consistently found to be more informative than other classes of markers in hexaploid wheat. The objectives of this research were to develop new primers flanking wheat microsatellites and to position the associated loci on the wheat genome map by genetic linkage mapping in the ITMI W7984 × Opata85 recombinant inbred line (RIL) population and/or by physical mapping with cytogenetic stocks. We observed that the efficiency of marker development could be increased in wheat by creating libraries from sheared rather than enzyme-digested DNA fragments for microsatellite screening, by focusing on microsatellites with the [ATT/TAA]n motif, and by adding an untemplated G-C clamp to the 5′-end of primers. A total of 540 microsatellite-flanking primer pairs were developed, tested, and annotated from random genomic libraries. Primer pairs and associated loci were assigned identifiers prefixed with BARC (the acronym for the USDA-ARS Beltsville Agricultural Research Center) or Xbarc, respectively. A subset of 315 primer sets was used to map 347 loci. One hundred and twenty-five loci were localized by physical mapping alone. Of the 222 loci mapped with the ITMI population, 126 were also physically mapped. Considering all mapped loci, 126, 125, and 96 mapped to the A, B, and D genomes, respectively. Twenty-three of the new loci were positioned in gaps larger than 10 cM in the map based on pre-existing markers, and 14 mapped to the ends of chromosomes. The length of the linkage map was extended by 80.7 cM. Map positions were consistent for 111 of the 126 loci positioned by both genetic and physical mapping. The majority of the 15 discrepancies between genetic and physical mapping involved chromosome group 5.

Supplementary material

122_2004_1871_ESM_supp1.pdf (53 kb)
(PDF 54 KB)
122_2004_1871_ESM_supp2.pdf (176 kb)
(PDF 180 KB)
122_2004_1871_ESM_supp3.pdf (83 kb)
(PDF 85 KB)

Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Q. J. Song
    • 1
    • 2
  • J. R. Shi
    • 3
    • 4
  • S. Singh
    • 5
  • E. W. Fickus
    • 1
  • J. M. Costa
    • 2
  • J. Lewis
    • 3
  • B. S. Gill
    • 5
  • R. Ward
    • 3
  • P. B. Cregan
    • 1
  1. 1.Soybean Genomics and Improvement LabBeltsville Agricultural Research Center, USDA-ARSUSA
  2. 2.Department of Natural Resource Sciences & Landscape ArchitectureUniversity of MarylandUSA
  3. 3.Department of Crop and Soil ScienceMichigan State UniversityEast LansingUSA
  4. 4.Jiangsu Academy of Agricultural SciencesNanjingP.R. China
  5. 5.Department of Plant PathologyKansas State UniversityManhattanUSA