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
文献类型: 外文期刊
第一作者: Guo, Xiaomin
作者: Guo, Xiaomin;Guo, Junxian;Li, Xiuquan;Yang, Xinming;Li, Lihui
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关键词: protein;open reading frame: ORF;PCR primer;high molecular weight glutenin subunits: HMW-GS;functional property;dough strength;wheat quality
期刊名称:GENETIC RESOURCES AND CROP EVOLUTION ( 影响因子:1.524; 五年影响因子:1.713 )
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收录情况: SCI
摘要: 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.
分类号: S18
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