Journal of Integrative Agriculture ›› 2022, Vol. 21 ›› Issue (7): 1867-1876.DOI: 10.1016/S2095-3119(21)63605-5

所属专题: 麦类遗传育种合辑Triticeae Crops Genetics · Breeding · Germplasm Resources

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JIA-2020-2195小麦高分子量谷蛋白亚基Glu-A1、Glu-D1位点缺失对蛋白体发育、蛋白组分和面团特性的影响

  

  • 收稿日期:2020-10-20 接受日期:2020-12-18 出版日期:2022-07-01 发布日期:2020-12-18

Influence of high-molecular-weight glutenin subunit deletions at the Glu-A1 and Glu-D1 loci on protein body development, protein components and dough properties of wheat (Triticum aestivum L.)

LIU Da-tong*, ZHANG Xiao*, JIANG Wei, LI Man, WU Xu-jiang, GAO De-rong, BIE Tong-de, LU Cheng-bin
  

  1. Key Laboratory of Wheat Biology and Genetic Improvement for Low & Middle Yangtze Valley, Ministry of Agriculture and Rural Affairs/Lixiahe Institute of Agricultural Sciences of Jiangsu, Yangzhou 225007, P.R.China
  • Received:2020-10-20 Accepted:2020-12-18 Online:2022-07-01 Published:2020-12-18
  • About author:LIU Da-tong, Tel: +86-514-87303868, E-mail: ldt@wheat.org.cn; ZHANG Xiao, Tel: +86-514-87303868, E-mail: zx@wheat.org.cn; Correspondence LU Cheng-bin, Tel: +86-514-87307821, E-mail: lucb123@126.com * These authors contributed equally to this study.
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (2016YFD0100500), the Natural Science Foundation of Jiangsu Province, China (BK20160448) and the National Natural Science Foundation of China (32071999 and 31700163).

摘要:

本研究以扬麦18为背景构建的四种不同Glu-A1Glu-D1位点缺失近等基因系为材料,观察了蛋白体发育的形态学特征、测定了蛋白组分和面团特性指标。结果表明,HMW-GS亚基缺失造成了蛋白体发育进程延迟。花后10天开始,HMW-GS缺失系表现为蛋白体发育延迟、体积增长减缓,随着花后时间增加差异减小;至花后25天(胚乳发育中后期),四种近等基因系蛋白体发育状况已无明显差异。与野生型和Glu-A1位点缺失类型相比,Glu-D1位点缺失和Glu-A1Glu-D1双缺失类型的高/低分子量谷蛋白比值、谷蛋白大聚合体含量、揉混仪参数以及拉伸仪参数降低,醇溶蛋白/谷蛋白比例升高;Glu-D1位点缺失后面团强度和延展性显著降低。本研究全面分析了HMW-GS缺失影响蛋白体发育、蛋白性状和面团特性的效应,为Glu-D1位点缺失种质在弱筋小麦品质改良中的应用提供了理论支撑,并提供了改良饼干、蛋糕、南方馒头和酿酒等原料弱筋小麦品质的新途径


Abstract:

High-molecular-weight glutenin subunits (HMW-GSs) play a critical role in determining the viscoelastic properties of wheat.  As the organelle where proteins are stored, the development of protein bodies (PBs) reflects the status of protein synthesis and also affects grain quality to a great extent.  In this study, with special materials of four near-isogenic lines in a Yangmai 18 background we created, the effects of Glu-A1 and Glu-D1 loci deletions on the development and morphological properties of the protein body, protein components and dough properties were investigated.  The results showed that the deletion of the HMW-GS subunit delayed the development process of the PBs, and slowed the increases of volume and area of PBs from 10 days after anthesis (DAA) onwards.  In contrast, the areas of PBs at 25 DAA, the middle or late stage of endosperm development, showed no distinguishable differences among the four lines.  Compared to the wild type and single null type in Glu-A1, the ratios of HMW-GSs to low-molecular-weight glutenin subunits (LMW-GSs), glutenin macropolymer (GMP) content, mixograph parameters as well as extension parameters decreased in the single null type in Glu-D1 and double null type in Glu-A1 and Glu-D1, while the ratios of gliadins (Gli)/glutenins (Glu) in those types increased.  The absence of Glu-D1 subunits decreased both dough strength and extensibility significantly compared to the Glu-A1 deletion type.  These results provide a detailed description of the effect of HMW-GS deletion on PBs, protein traits and dough properties, and contribute to the utilization of Glu-D1 deletion germplasm in weak gluten wheat improvement for use in cookies, cakes and southern steamed bread in China and liquor processing. 

Key words: wheat ,  near-isogenic lines ,  HMW-GS ,  deletion ,  protein body ,  dough property