Abstract
The high molecular weight glutenin subunits (HMW-GS) can be used for wheat quality improvement. Two novel alleles (designated 1Dx1.5* and 1Dy12.2*, respectively) at the Glu-D1 locus were identified in the Chinese wheat landrace variety ‘Jiuquanjinbaoyin’ by comparison of subunit mobility with that previously identified in several standard hexaploid wheats. The 1Dx1.5* and 1Dy12.2* genes were isolated using the allele-specific PCR primers and the complete open reading frames (ORFs) were obtained. Allele 1Dx1.5* consists of 2487 bp encoding a mature protein of 827 amino acid residues, whereas 1Dy12.2* consists 1980 bp encoding 658 residues. Comparisons of amino acid sequences analysis showed that 1Dx1.5* had higher similarity with the HMW-GS isolated from the wheat related species (Aegilops tauchi Coss.) than from the bread wheat varieties (Triticum aestivum L.). The 1Dy12.2* amino acid sequence showed a generally similar to the 1Dy12* isolated from Chinese endemic wheats. Meanwhile, the dough properties of the lines expressing (null, 7+8, 1.5*+10), (null, 7+8, 2+12.2*) and (null, 7+8, 2+12), respectively, were measured by a Mixograph, which demonstrates that the alleles 1.5*+10 can be considered as having positive impact on dough strength when compared with the alleles 2+12. In addition, the subunits 2+12.2* also showed a greater impact on dough strength than 2+12.
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This research is supported by grants from the National Basic Research Program of China (2006CB100201).
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Guo, X., Guo, J., Li, X. et al. Molecular characterization of two novel Glu-D1-encoded subunits from Chinese wheat (Triticum aestivum L.) landrace and functional properties of flours possessing the two novel subunits. Genet Resour Crop Evol 57, 1217–1225 (2010). https://doi.org/10.1007/s10722-010-9561-9
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DOI: https://doi.org/10.1007/s10722-010-9561-9