Influence of low-molecular weight glutenin subunits on wheat kernel elasticity and sedimentation volume

Abstract

The effect of low molecular weight (LMW) glutenin subunits (GS) in presence of high molecular weight (HMW)-GS has over SDS sedimentation volume (SDSS) and kernel elasticity is presented. Twenty-six wheat lines having different origins and classified by SDS-PAGE into 14 different LMW-GS genotypic allelic groups were analyzed. When good HMW-GS background, i.e. Glu-1 1, 2*, 7 + 9 or 17 + 18 and 5 + 10 was associated with a number of allelic variants of Glu-3 loci (LMW-GS), i.e. Glu-A3 c and b; Glu-B3 g, h, d, higher kernel modulus of elasticity and SDSS were generally present. However, when poor HMW-GS background was present, i.e. Glu-1 null, 7 + 8, 2 + 12, a poor to medium modulus of elasticity and SDSS were generally found. Glu-B3 j allelic group, which possesses the wheat-rye translocation showed a tendency to have low elastic modulus, high plastic work (WP) and low SDSS. The effects of good LMW-GS are enhanced by a good HMW-GS background, yielding higher kernel elasticity and SDSS.

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Correspondence to J. D. C. Figueroa.

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Communicated by F. Békés

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Figueroa, J.D.C., Peña, R.J., Rayas-Duarte, P. et al. Influence of low-molecular weight glutenin subunits on wheat kernel elasticity and sedimentation volume. CEREAL RESEARCH COMMUNICATIONS 39, 237–245 (2011). https://doi.org/10.1556/CRC.39.2011.2.7

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Keywords

  • LMW-GS
  • HMW-GS
  • sedimentation volume
  • modulus of elasticity
  • kernel elasticity