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Journal of Plant Registrations Abstract - Cultivars

Registration of ‘SY Clearstone 2CL’ Wheat


This article in JPR

  1. Vol. 8 No. 2, p. 162-164
    Received: Aug 16, 2013
    Published: March 31, 2014

    * Corresponding author(s): bruckner@montana.edu
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  1. J. E. Berga,
  2. P. Hofera,
  3. E. S. Davisb,
  4. R. N. Stougaardc,
  5. K. D. Kephartd,
  6. P. F. Lambe,
  7. D. M. Wichmanf,
  8. J. L. Eckhoffg,
  9. J. H. Millerh,
  10. D. L. Nasha,
  11. W. E. Greya,
  12. Y. Jini,
  13. X. Chenj and
  14. P. L. Bruckner *a
  1. a Dep. of Plant Sciences & Plant Pathology, Montana State Univ., Bozeman, MT 59717-3140
    b Dep. of Land Resources and Environmental Sciences, Montana State Univ., Bozeman, MT 59717
    c Northwestern Agricultural Research Center, 4570 Montana 35, Kalispell, MT 59901
    d Southern Agricultural Research Center, 748 Railroad Hwy., Huntley, MT 59037
    e Northern Agricultural Research Center, 3710 Assinniboine Rd., Havre, MT 59501-8412
    f Central Agricultural Research Center, 52583 US Hwy. 87, Moccasin, MT 59462
    g Eastern Agricultural Research Center, 1501 N. Central, Sidney, MT 59270
    h J.H. Miller, Western Triangle Agricultural Research Center, 9546 Old Shelby Rd., Conrad, MT 59425
    i USDA–ARS, Cereal Disease Lab., 1551 Lindig St., St. Paul, MN 55108-6052
    j USDA–ARS, P.O. Box 646430, Pullman, WA 99164-6430


‘SY Clearstone 2CL’ (Reg. No. CV-1094, PI 668090) hard red winter wheat (Triticum aestivum L.) was developed by the Montana Agricultural Experiment Station and released in September 2012 through a marketing agreement with Syngenta Seeds. SY Clearstone 2CL is a two-gene Clearfield backcross-derivative of ‘Yellowstone’ (PI 643428) hard red winter wheat with resistance to imazamox herbicide Beyond (BASF Corporation). SY Clearstone 2CL was selected from the cross Yellowstone*4/3/MTCL01158/Teal 11A//‘Jagalene’ (PI 631376). Yellowstone is a high-yielding hard red winter wheat released by the Montana Agricultural Experiment Station in 2006. MTCL01158 is an unreleased doubled haploid breeding line [TX12588*4/FS2//Tiber (PI 517194)], which served as the source of proprietary mutant allele TaAHASL1D. Proprietary hard red spring wheat germplasm line Teal 11A (BASF Corporation) served as the source of mutant gene TaAHASL1B. Alleles for herbicide resistance were selected during the backcross process using single-nucleotide, allele-specific polymerase chain reaction markers for TaAHASL1D and TaAHASL1B developed by BASF. SY Clearstone 2CL was selected as an F2:4 line in 2009 following three generations of screening of the backcross population with imazamox herbicide. Results of three years of replicated field testing indicate that SY Clearstone 2CL is similar to recurrent parent Yellowstone for grain yield, most agronomic characteristics, and milling and baking qualities.

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