Theoretical and Applied Genetics

, Volume 112, Issue 2, pp 327–334 | Cite as

Characterization of low-molecular-weight glutenin subunit genes and their protein products in common wheats

  • T.M. IkedaEmail author
  • E. Araki
  • Y. Fujita
  • H. Yano
Original Paper


To characterize the low-molecular-weight glutenin subunit (LMW-GS), we developed specific PCR primer sets to distinguish 12 groups of LMW-GS genes of Norin 61 and to decide their loci with nullisomic–tetrasomic lines of Chinese Spring. Three, two, and ten groups were assigned to Glu-A3, Glu-B3, and Glu-D3 loci, respectively. To identify the proteins containing the corresponding amino acid sequences, we determined the N-terminal amino acid sequence of 12 spots of LMW-GSs of Norin 61 separated by two-dimensional gel electrophoresis (2DE). The N-terminal sequences of the LMW-GS spots showed that 10 of 12 groups of LMW-GSs were expressed as protein products, which included LMW-i, LMW-m, and LMW-s types. Four spots were encoded by Glu-A3 (LMW-i). Three spots were encoded by Glu-B3 (LMW-m and LMW-s). Five spots were encoded by Glu-D3 (LMW-m and LMW-s). A minor spot of LMW-m seemed to be encoded by the same Glu-B3 gene as a major spot of LMW-s, but processed at a different site. Comparing among various cultivars, there were polymorphic and non-polymorphic LMW-GSs. Glu-A3 was highly polymorphic, i.e., the a, b, and c alleles showed one spot, the d allele showed four spots, and the e allele had no spot. Insignia used as one of the Glu-A3 null standard cultivars had a LMW-GS encoded by Glu-A3. We also found that Cheyenne had a new Glu-D3 allele. Classification of LMW-GS by a combination of PCR and 2DE will be useful to identify individual LMW-GSs and to study their contribution to flour quality.


Glutenin Subunit Major Spot Standard Cultivar Glutamine Repeat Minor Spot 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Department of Crop BreedingNational Agricultural Research Center for Western RegionFukuyamaJapan

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