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Crop Science Abstract -

Quantitative Trait Loci Associated with Kernel Traits in a Soft × Hard Wheat Cross


This article in CS

  1. Vol. 39 No. 4, p. 1184-1195
    Received: June 12, 1998

    * Corresponding author(s): campbell.210@osu.edu
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  1. Kim Garland Campbell ,
  2. Christine J. Bergman,
  3. Daisy G. Gualberto,
  4. James A. Anderson,
  5. Micheal J. Giroux,
  6. Gary Hareland,
  7. R. Gary Fulcher,
  8. Mark E. Sorrells and
  9. Patrick L. Finney
  1. Dep. of Horticulture and Crop Science, The Ohio State Univ. and the Ohio Agric. Res. and Dev. Center, Wooster, OH 44691;
    Rice Research Unit, Beaumont, TX 77713;
    USDA-ARS Soft Wheat Quality Lab., Wooster, OH 44691;
    Dep. of Agronomy and Plant Genetics, Univ. of Minnesota, St. Paul, MN 55116;
    Dep. of Plant, Soil, and Environmental Science, Montana State Univ., Bozeman, MT 59717-312;
    USDA-ARS Hard Red Spring and Durum Wheat Quality Lab., Fargo, ND 58105;
    Dep. of Food Science and Nutrition, Univ. of Minnesota, St. Paul, MN 55116;
    Dep. of Plant Breeding and Biometry, Cornell Univ., Ithaca NY 14853.



Kernel morphology and texture influence the value of wheat (Triticum aestivum L.). The objectives of this study were to determine associations between kernel traits and molecular markers and to identify quantitative trait loci (QTLs) affecting kernel traits in a soft × hard white wheat cross. Seventy eight F2:5-derived recombinant inbred lines (RILs) from cross between the soft white wheat NY6432-18 (NY18) and the hard white wheat ‘Clark's Cream’ (CC) were developed by single seed descent. Kernel texture was measured by near infrared reflectance (NIR) on RIL grain samples from six environments. Digital image analysis (DIA) was used to measure kernel length, width, area, perimeter on grain samples from four environments. Test weight and thousand kernel weight (TKW) were also determined. Shape factor and density factor were calculated. The map for this population consisted of 313 molecular markers in 47 linkage groups located on all wheat homoeologous chromosome groups. Linkage groups that mapped to wheat homoeologous group 2 chromosomes were highly skewed towards NY18 alleles. Genotype effects and genotype × environment interactions were highly significant for most traits. QTLs for kernel width and kernel length also influenced kernel area and TKW, but did not influence each other. The pinB marker at the puroindoline B locus on chromosome 5DS explained over 60% of the phenotypic variation for kernel texture. QTLs for kernel traits were located on chromosomes IA, 2B, 2D, 3B, 7A, and 7B.

OARDC Journal article no. HCS98-3. Research supported by state and federal funds appropriated to OARDC, The Ohio Seed Improvement Association, The Mennel Milling Company and Hatch project 149-419. Mention of trade names does not connote endorsement of products by The Ohio State Univ. or the USDAARS.

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