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This article in CS

  1. Vol. 47 No. 4, p. 1451-1458
    Received: July 17, 2006

    * Corresponding author(s): zenta@affrc.go.jp


Small-Scale Bread-Quality-Test Performance Heritability in Bread Wheat: Influence of High Molecular Weight Glutenin Subunits and the 1BL.1RS Translocation

  1. Z. Nishio *a,
  2. K. Takatab,
  3. M. Itoa,
  4. T. Tabikia,
  5. T. M. Ikedab,
  6. Y. Fujitab,
  7. W. Maruyama-Funatsukic,
  8. N. Irikic and
  9. H. Yamauchia
  1. a National Agricultural Research Center for Hokkaido Region (Memuro), Shinsei, Memuro, Hokkaido 082-0071, Japan
    b National Agricultural Research Center for Western Region, 6-12-1 Nishi-Fukatsucho, Fukuyama, Hiroshima 721-8514, Japan
    c National Agricultural Research Center for the Hokkaido Region (Sapporo), 1 Hitsujigaoka, Toyohira, Sapporo, Hokkaido 062-8555, Japan


Small-scale bread-quality assays (grain protein content, SDS-sedimentation volume [SDSS], and single-kernel characterization system [SKCS] grain hardness) represent important tools in bread wheat (Triticum aestivum L.) breeding. The influence of high-molecular-weight glutenin (HMWG) subunits and the 1BL.1RS translocation on small-scale bread-quality assays and their heritability was investigated for F3 and F4 lines of two wheat populations. Lines with HMWG subunits 5+10 at Glu-D1 showed significantly greater SDSS volume and SKCS hardness than those with subunits 2+12 or 4+12. Lines with HMWG subunit 20 at Glu-B1 had a significantly lower SDSS volume than those with HMWG subunits 7+8 or 7+9. F4 lines bearing the 1BL.1RS translocation had significantly greater protein content. The distribution of SDSS volumes suggested that most bore the undesirable HMWG subunits 2+12, 4+12 or 20, but could be selected against if the SDSS volume <6.0 mL. For SDSS volume, lines with HMWG subunits 5+10 had greater heritability in upward screening, whereas those with HMWG subunits 2+12 or 4+12 had greater heritability in downward screening. The above screening criterion provides an excellent tool for bread quality-based wheat breeding, irrespective of hard × hard or hard × soft wheat crosses.

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