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| Genetic Variations of Gliadin and HMW Glutenins Subunits in Durum Wheat |
| WANG Han-yan;WEI Yu-ming;YAN Ze-hong;ZHENG You-liang |
| 1 .Triticeae Research Institute, Sichuan Agriculture University, Ya'an 625014, China; 2. Key Laboratory of Crop Genetic Resources and Improvement in Southwest China, Ministry of Education, Sichuan Agriculture University, Ya'an 625014, China |
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Abstract The wheat baking quality is controlled by the content and composition of wheat endosperm proteins. To exploit new genetic resources and provide fundamental materials for the improvement of bread wheat quality, the genetic variations of the storage proteins in 142 durum wheat (Triticum durum Desf.) accessions from 22 countries were characterized by A-PAGE and SDS-PAGE. A total of 37 gliadin bands were detected, among which all bands(100%) were polymorphic. Furthermore, 142 accessions could be divided into three major groups using the clustering analysis, indicating that the gliadin variations among durum wheat were associated with their geographic origin. Fourteen high-molecular-weight (HMW) glutenin subunits alleles and fifteen subunits combinations were identified. Glu-A1-c(null) was observed at the highest frequency among the 4 Glu-A1 alleles, and Glu-B1-b and Glu-B1-e were the major subunits encoded by Glu-B1.
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Received: 21 October 2005
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Corresponding Authors:
ZHENG You-liang
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