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Bu Z, Fang G, Yu H, Kong D, Huo Y, Ma X, Chong H, Guan X, Liu D, Fan K, Yan M, Ma W, Chen J. Quality and Agronomic Trait Analyses of Pyramids Composed of Wheat Genes NGli-D2, Sec-1s and 1Dx5+1Dy10. Int J Mol Sci 2023; 24:ijms24119253. [PMID: 37298204 DOI: 10.3390/ijms24119253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/17/2023] [Accepted: 05/22/2023] [Indexed: 06/12/2023] Open
Abstract
Due to rising living standards, it is important to improve wheat's quality traits by adjusting its storage protein genes. The introduction or locus deletion of high molecular weight subunits could provide new options for improving wheat quality and food safety. In this study, digenic and trigenic wheat lines were identified, in which the 1Dx5+1Dy10 subunit, and NGli-D2 and Sec-1s genes were successfully polymerized to determine the role of gene pyramiding in wheat quality. In addition, the effects of ω-rye alkaloids during 1BL/1RS translocation on quality were eliminated by introducing and utilizing 1Dx5+1Dy10 subunits through gene pyramiding. Additionally, the content of alcohol-soluble proteins was reduced, the Glu/Gli ratio was increased and high-quality wheat lines were obtained. The sedimentation values and mixograph parameters of the gene pyramids under different genetic backgrounds were significantly increased. Among all the pyramids, the trigenic lines in Zhengmai 7698, which was the genetic background, had the highest sedimentation value. The mixograph parameters of the midline peak time (MPT), midline peak value (MPV), midline peak width (MPW), curve tail value (CTV), curve tail width (CTW), midline value at 8 min (MTxV), midline width at 8 min (MTxW) and midline integral at 8 min (MTxI) of the gene pyramids were markedly enhanced, especially in the trigenic lines. Therefore, the pyramiding processes of the 1Dx5+1Dy10, Sec-1S and NGli-D2 genes improved dough elasticity. The overall protein composition of the modified gene pyramids was better than that of the wild type. The Glu/Gli ratios of the type I digenic line and trigenic lines containing the NGli-D2 locus were higher than that of the type II digenic line without the NGli-D2 locus. The trigenic lines with Hengguan 35 as the genetic background had the highest Glu/Gli ratio among the specimens. The unextractable polymeric protein (UPP%) and Glu/Gli ratios of the type II digenic line and trigenic lines were significantly higher than those of the wild type. The UPP% of the type II digenic line was higher than that of the trigenic lines, while the Glu/Gli ratio was slightly lower than that of the trigenic lines. In addition, the celiac disease (CD) epitopes' level of the gene pyramids significantly decreased. The strategy and information reported in this study could be very useful for improving wheat processing quality and reducing wheat CD epitopes.
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Affiliation(s)
- Zhimu Bu
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Gongyan Fang
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Haixia Yu
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Dewei Kong
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Yanbing Huo
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Xinyu Ma
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Hui Chong
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Xin Guan
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Daxin Liu
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Kexin Fan
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Min Yan
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
| | - Wujun Ma
- College of Agronomy, Qingdao Agricultural University, Chengyang District, Qingdao 266109, China
| | - Jiansheng Chen
- State Key Laboratory of Crop Biology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/Group of Wheat Quality Breeding, Shandong Agricultural University, Tai'an 271018, China
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Peng Y, Zhao Y, Yu Z, Zeng J, Xu D, Dong J, Ma W. Wheat Quality Formation and Its Regulatory Mechanism. FRONTIERS IN PLANT SCIENCE 2022; 13:834654. [PMID: 35432421 PMCID: PMC9006054 DOI: 10.3389/fpls.2022.834654] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 03/09/2022] [Indexed: 05/07/2023]
Abstract
Elucidation of the composition, functional characteristics, and formation mechanism of wheat quality is critical for the sustainable development of wheat industry. It is well documented that wheat processing quality is largely determined by its seed storage proteins including glutenins and gliadins, which confer wheat dough with unique rheological properties, making it possible to produce a series of foods for human consumption. The proportion of different gluten components has become an important target for wheat quality improvement. In many cases, the processing quality of wheat is closely associated with the nutritional value and healthy effect of the end-products. The components of wheat seed storage proteins can greatly influence wheat quality and some can even cause intestinal inflammatory diseases or allergy in humans. Genetic and environmental factors have great impacts on seed storage protein synthesis and accumulation, and fertilization and irrigation strategies also greatly affect the seed storage protein content and composition, which together determine the final end-use quality of wheat. This review summarizes the recent progress in research on the composition, function, biosynthesis, and regulatory mechanism of wheat storage proteins and their impacts on wheat end-product quality.
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Affiliation(s)
- Yanchun Peng
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Yun Zhao
- College of Agronomy, Qingdao Agricultural University, Qingdao, China
- Food Futures Institute and College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
| | - Zitong Yu
- Food Futures Institute and College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
| | - Jianbin Zeng
- College of Agronomy, Qingdao Agricultural University, Qingdao, China
| | - Dengan Xu
- College of Agronomy, Qingdao Agricultural University, Qingdao, China
| | - Jing Dong
- Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Food Crops Institute, Hubei Academy of Agricultural Sciences, Wuhan, China
| | - Wujun Ma
- College of Agronomy, Qingdao Agricultural University, Qingdao, China
- Food Futures Institute and College of Science, Health, Engineering and Education, Murdoch University, Perth, WA, Australia
- *Correspondence: Wujun Ma,
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Genetic diversity of ribosomal loci (5S and 45S rDNA) and pSc119.2 repetitive DNA sequence among four species of Aegilops (Poaceae) from Algeria. UKRAINIAN BOTANICAL JOURNAL 2021. [DOI: 10.15407/ukrbotj78.06.414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In continuation of our previous research we carried out the karyological investigation of 53 populations of four Aegilops species (A. geniculata, A. triuncialis, A. ventricosa, and A. neglecta) sampled in different eco-geographical habitats in Algeria. The genetic variability of the chromosomal DNA loci of the same collection of Aegilops is highlighted by the Fluorescence In Situ Hybridization technique (FISH) using three probes: 5S rDNA, 45S rDNA, and repetitive DNA (pSc119.2). We found that the two rDNA loci (5S and 45S) hybridized with some chromosomes and showed a large genetic polymorphism within and between the four Aegilops species, while the repetitive DNA sequences (pSc119.2) hybridized with all chromosomes and differentiated the populations of the mountains with a humid bioclimate from the populations of the steppe regions with an arid bioclimate. However, the transposition of the physical maps of the studied loci (5S rDNA, 45S rDNA, and pSc119.2) with those of other collections revealed the existence of new loci in Aegilops from Algeria.
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Hu X, Dai S, Yan Y, Liu Y, Zhang J, Lu Z, Wei Y, Zheng Y, Cong H, Yan Z. The genetic diversity of group-1 homoeologs and characterization of novel LMW-GS genes from Chinese Xinjiang winter wheat landraces (Triticum aestivum L.). J Appl Genet 2020; 61:379-389. [PMID: 32548810 DOI: 10.1007/s13353-020-00564-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 05/24/2020] [Accepted: 05/26/2020] [Indexed: 11/26/2022]
Abstract
Group-1 homoelog genes in wheat genomes encode storage proteins and are the major determinants of wheat product properties. Consequently, understanding the genetic diversity of group-1 homoelogs and genes encoding storage proteins, especially the low-molecular-weight glutenins (LMW-GSs), within wheat landrace genomes is necessary to further improve the quality of modern wheat crops. The genetic diversity of group-1 homoelogs in 75 Xinjiang winter wheat landraces was evaluated by Diversity Arrays Technology (DArT) markers. These data were used to select 15 landraces for additional LMW-GS gene isolation. The genetic similarity coefficients among landraces were highly similar regardless if considering the diversity markers on 1A, 1B, and 1D chromosomes individually or using all of the markers together. These similarities were evinced by the generation of four similar cluster dendrograms that comprised 11-15 landrace groups, regardless of the dataset used to generate the dendrograms. A total of 105 LMW-GS sequences corresponding to 79 unique genes were identified overall by using primers designed to target Glu-A3 and Glu-B3 loci, and 54 mature proteins were predicted from the unique LMW-GS genes. Nine novel chimeric LMW-GS genes were also identified, of which, one was recombinant for -i/-m, one for -s/-m, and seven for -m/-m parent genes, respectively. Phylogenetic analysis separated all of the LMW-GSs into three clades that were supported by moderate bootstrap values (> 70%). The clades corresponded to LMW-GS genes primarily harboring different N-terminals. These results provide useful information for better understanding the evolutionary genetics of the important Glu-3 locus of wheat, and they also provide new novel gene targets that can potentially be exploited to improve wheat quality.
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Affiliation(s)
- Xinkun Hu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
- Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
| | - Shoufen Dai
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
- Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
| | - Yongliang Yan
- Institute of Crop Germplasm Resource, Xinjiang Academy of Agricultural Sciences, Urumqi, 830091, People's Republic of China.
| | - Yaxi Liu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
- Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
| | - Jinbo Zhang
- Institute of Crop Germplasm Resource, Xinjiang Academy of Agricultural Sciences, Urumqi, 830091, People's Republic of China
| | - Zifeng Lu
- Institute of Crop Germplasm Resource, Xinjiang Academy of Agricultural Sciences, Urumqi, 830091, People's Republic of China
| | - Yuming Wei
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
- Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
| | - Youliang Zheng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
- Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China
| | - Hua Cong
- Institute of Crop Germplasm Resource, Xinjiang Academy of Agricultural Sciences, Urumqi, 830091, People's Republic of China
| | - Zehong Yan
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China.
- Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu, 611130, Sichuan, People's Republic of China.
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Li X, Li Y, Karim H, Li Y, Zhong X, Tang H, Qi P, Ma J, Wang J, Chen G, Pu Z, Li W, Tang Z, Lan X, Deng M, Li Z, Harwood W, Wei Y, Zheng Y, Jiang Q. The production of wheat - Aegilops sharonensis 1S sh chromosome substitution lines harboring alien novel high-molecular-weight glutenin subunits. Genome 2019; 63:155-167. [PMID: 31846356 DOI: 10.1139/gen-2019-0106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In our previous work, a novel high-molecular-weight glutenin subunit (HMW-GS) with an extremely large molecular weight from Aegilops sharonensis was identified that may contribute to excellent wheat (Triticum aestivum) processing quality and increased dough strength, and we further generated HMW-GS homozygous lines by crossing. In this study, we crossed the HMW-GS homozygous line 66-17-52 with 'Chinese Spring' Ph1 mutant CS ph1b to induce chromosome recombination between wheat and Ae. sharonensis. SDS-PAGE was used to identify 19 derived F2 lines with the HMW-GSs of Ae sharonensis. The results of non-denaturing fluorescence in situ hybridization (ND-FISH) indicated that lines 6-1 and 6-7 possessed a substitution of both 5D chromosomes by a pair of 1Ssh chromosomes. Further verification by newly developed 1Ssh-specific chromosome markers showed that these two lines amplified the expected fragment. Thus, it was concluded that lines 6-1 and 6-7 are 1Ssh(5D) chromosome substitution lines. The 1Ssh(5D) chromosome substitution lines, possessing alien subunits with satisfactory quality-associated structural features of large repetitive domains and increased number of subunits, may have great potential in strengthening the viscosity and elasticity of dough made from wheat flour. Therefore, these substitution lines can be used for wheat quality improvement and further production of 1Ssh translocation lines.
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Affiliation(s)
- Xiaoyu Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yu Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Hassan Karim
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yue Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xiaojuan Zhong
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Huaping Tang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Pengfei Qi
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Jian Ma
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Jirui Wang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Guoyue Chen
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Zhien Pu
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Wei Li
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Zongxiang Tang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xiujin Lan
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Mei Deng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Zhongyi Li
- CSIRO Agriculture and Food, Black Mountain, Canberra, ACT 2601, Australia
| | - Wendy Harwood
- John Innes Centre, Norwich Research Park, Norwich NR4 7UH, United Kingdom
| | - Yuming Wei
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Youliang Zheng
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Qiantao Jiang
- State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China.,Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
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Kumar A, Kapoor P, Chunduri V, Sharma S, Garg M. Potential of Aegilops sp. for Improvement of Grain Processing and Nutritional Quality in Wheat ( Triticum aestivum). FRONTIERS IN PLANT SCIENCE 2019; 10:308. [PMID: 30936886 PMCID: PMC6431632 DOI: 10.3389/fpls.2019.00308] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 02/26/2019] [Indexed: 06/09/2023]
Abstract
Wheat is one of the most important staple crops in the world and good source of calories and nutrition. Its flour and dough have unique physical properties and can be processed to make unique products like bread, cakes, biscuits, pasta, noodles etc., which is not possible from other staple crops. Due to domestication, the genetic variability of the genes coding for different economically important traits in wheat is narrow. This genetic variability can be increased by utilizing its wild relatives. Its closest relative, genus Aegilops can be an important source of new alleles. Aegilops has played a very important role in evolution of tetraploid and hexaploid wheat. It consists of 22 species with C, D, M, N, S, T and U genomes with high allelic diversity relative to wheat. Its utilization for wheat improvement for various abiotic and biotic stresses has been reported by various scientific publications. Here in, for the first time, we review the potential of Aegilops for improvement of processing and nutritional traits in wheat. Among processing quality related gluten proteins; high molecular weight glutenins (HMW GS), being easiest to study have been explored in highest number of accessions or lines i.e., 681 belonging to 13 species and selected ones like Ae. searsii, Ae. geniculata and Ae. longissima have been linked with improved bread making quality of wheat. Gliadins and low molecular weight glutenins (LMW GS) have also been extensively explored for wheat improvement and Ae. umbellulata specific LMW GS have been linked with wheat bread making quality improvement. Aegilops has been explored for seed texture diversity and proteins like puroindolins (Pin) and grain softness proteins (GSP). For nutrition quality improvement, it has been screened for essential micronutrients like Fe, Zn, phytochemicals like carotenoids and dietary fibers like arabinoxylan and β-glucan. Ae. kotschyi and Ae. biuncialis transfer in wheat have been associated with higher Fe, Zn content. In this article we have tried to compile information available on exploration of nutritional and processing quality related traits in Aegilops section and their utilization for wheat improvement by different approaches.
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Goel S, Yadav M, Singh K, Jaat RS, Singh NK. Exploring diverse wheat germplasm for novel alleles in HMW-GS for bread quality improvement. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2018; 55:3257-3262. [PMID: 30065437 PMCID: PMC6046000 DOI: 10.1007/s13197-018-3259-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 10/17/2017] [Accepted: 05/28/2018] [Indexed: 12/31/2022]
Abstract
Wheat is one of the most important cereals used worldwide in the form of a range of products. Crop landraces have been an immense source of diversity for the breeders. In the present study, 517 Indian wheat landraces have been observed for the difference in bread making quality by assessing allelic behaviour of high molecular weight-glutenin subunits (HMW-GS). A total of 33 Glu-1 alleles (3 at Glu-A1, 15 at Glu-B1 and 15 at Glu-D1) were detected in wheat landraces. Allelic frequency of HMW-GS allelic band pattern null, 17 + 18, 2 + 12 (24.75%) was found to be the highest. Allelic frequency of HMW-GS allele null (68.27%) at Glu-A1, 17 + 18 (49.14%) at Glu-B1, and 2 + 12 (72.81%) at Glu-D1 was found to be the highest Five Novel alleles were identified at Glu-D1 locus, 12*, 12.1, 12.1*, 12.2 and 12.3. As Glu-D1 has highest quality contribution as compared to Glu-A1 and Glu-B1, reporting novel alleles at Glu-D1 represents that genetic variability available for selection is increased and it will provide tools for breeders to further improve dough properties and bread making quality.
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Affiliation(s)
- Sonia Goel
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012 India
| | - Mohini Yadav
- Amity Institute of Biotechnology, Amity University, Noida, Uttar Pradesh India
| | - Kalpana Singh
- Water Technology Centre, Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012 India
| | - Ranjeet Singh Jaat
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012 India
| | - N. K. Singh
- National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, Pusa Campus, New Delhi, 110012 India
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Du X, Ma X, Min J, Zhang X, Jia Z. Development of a wheat- Aegilops searsii substitution line with positively affecting Chinese steamed bread quality. BREEDING SCIENCE 2018; 68:289-293. [PMID: 29875614 PMCID: PMC5982175 DOI: 10.1270/jsbbs.17044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 12/14/2017] [Indexed: 05/31/2023]
Abstract
A wheat-Aegilops searsii substitution line GL1402, in which chromosome 1B was substituted with 1Ss from Ae. searsii, was developed and detected using SDS-PAGE and GISH. The SDS-PAGE analysis showed that the HMW-GS encoded by the Glu-B1 loci of Chinese Spring was replaced by the HMW-GS encoded by the Glu-1Ss loci of Ae. searsii. Glutenin macropolymer (GMP) investigation showed that GL1402 had a much higher GMP content than Chinese Spring did. A dough quality comparison of GL1402 and Chinese Spring indicated that GL1402 showed a significantly higher protein content and middle peak time (MPT), and a smaller right peak slope (RPS). Quality tests of Chinese steamed bread (CSB) showed that the GL1402 also produced good steamed bread quality. These results suggested that the substitution line is a valuable breeding material for improving the wheat processing quality.
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Affiliation(s)
- Xuye Du
- School of Life Sciences, Guizhou Normal University,
No. 116, Baoshan North Street, Guiyang, 550001, Guizhou Province,
China P.R
| | - Xin Ma
- College of Agronomy, Shandong Agricultural University,
No. 61, Daizong Street, Taian, 271018, Shandong Province,
China P.R
| | - Jingzhi Min
- School of Life Sciences, Guizhou Normal University,
No. 116, Baoshan North Street, Guiyang, 550001, Guizhou Province,
China P.R
| | - Xiaocun Zhang
- College of Food Science and Engineering, Shandong Agricultural University,
No. 61, Daizong Street, Taian, 271018, Shandong Province,
China P.R
| | - Zhenzhen Jia
- Management Office of Scientific Research, Guizhou Normal University,
No. 116, Baoshan North Street, Guiyang, 550001, Guizhou Province,
China P.R
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Alvarez JB, Guzmán C. Interspecific and intergeneric hybridization as a source of variation for wheat grain quality improvement. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2018; 131:225-251. [PMID: 29285597 DOI: 10.1007/s00122-017-3042-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 12/17/2017] [Indexed: 05/27/2023]
Abstract
The hybridization events with wild relatives and old varieties are an alternative source for enlarging the wheat quality variability. This review describes these process and their effects on the technological and nutritional quality. Wheat quality and its end-uses are mainly based on variation in three traits: grain hardness, gluten quality and starch. In recent times, the importance of nutritional quality and health-related aspects has increased the range of these traits with the inclusion of other grain components such as vitamins, fibre and micronutrients. One option to enlarge the genetic variability in wheat for all these components has been the use of wild relatives, together with underutilised or neglected wheat varieties or species. In the current review, we summarise the role of each grain component in relation to grain quality, their variation in modern wheat and the alternative sources in which wheat breeders have found novel variation.
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Affiliation(s)
- Juan B Alvarez
- Departamento de Genética, Escuela Técnica Superior de Ingeniería Agronómica y de Montes, Edificio Gregor Mendel, Campus de Rabanales, Universidad de Córdoba, CeiA3, 14071, Córdoba, Spain.
| | - Carlos Guzmán
- CIMMYT, Global Wheat Program, Km 45 Carretera México-Veracruz, El Batán, C.P. 56130, Texcoco, Estado de México, Mexico
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10
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Wang D, Zhang K, Dong L, Dong Z, Li Y, Hussain A, Zhai H. Molecular genetic and genomic analysis of wheat milling and end-use traits in China: Progress and perspectives. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.cj.2017.10.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Liu W, Koo DH, Xia Q, Li C, Bai F, Song Y, Friebe B, Gill BS. Homoeologous recombination-based transfer and molecular cytogenetic mapping of powdery mildew-resistant gene Pm57 from Aegilops searsii into wheat. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2017; 130:841-848. [PMID: 28116459 DOI: 10.1007/s00122-017-2855-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 01/04/2017] [Indexed: 05/23/2023]
Abstract
Pm57, a novel resistant gene against powdery mildew, was transferred into common wheat from Ae. searsi and further mapped to 2S s #1L at an interval of FL0.75 to FL0.87. Powdery mildew, caused by the fungus Blumeria graminis f. sp. tritici, is one of the most severe foliar diseases of wheat causing reduction in grain yield and quality. Host plant resistance is the most effective and environmentally safe approach to control this disease. Tests of a set of Chinese Spring-Ae. searsii (SsSs, 2n = 2x = 14) Feldman & Kislev ex K. Hammer disomic addition lines with a mixed isolate of the powdery mildew fungus identified a novel resistance gene(s), designed as Pm57, which was located on chromosome 2Ss#1. Here, we report the development of ten wheat-Ae. searsii recombinants. The wheat chromosomes involved in five of these recombinants were identified by FISH and SSR marker analysis and three of them were resistant to powdery mildew. Pm57 was further mapped to the long arm of chromosome 2Ss#1 at a fraction length interval of FL 0.75 to FL 0.87. The recombinant stocks T2BS.2BL-2Ss#1L 89-346 (TA5108) with distal 2Ss#1L segments of 28% and 89(5)69 (TA5109) with 33% may be useful in wheat improvement. The PCR marker X2L4g9p4/HaeIII was validated to specifically identify the Ae. searsii 2Ss#1L segment harboring Pm57 in T2BS.2BL-2Ss#1L against 16 wheat varieties and advanced breeding lines, and the development of more user-friendly KASP markers is underway.
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Affiliation(s)
- Wenxuan Liu
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
| | - Dal-Hoe Koo
- Department of Plant Pathology, Wheat Genetics Resource Center, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, KS, 66506-5502, USA
| | - Qing Xia
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China
| | - Chunxin Li
- Henan Academy of Agricultural Sciences, Zhengzhou, 450002, People's Republic of China
| | - Fuqiang Bai
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China
| | - Yuli Song
- Henan Academy of Agricultural Sciences, Zhengzhou, 450002, People's Republic of China
| | - Bernd Friebe
- Department of Plant Pathology, Wheat Genetics Resource Center, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, KS, 66506-5502, USA
| | - Bikram S Gill
- Department of Plant Pathology, Wheat Genetics Resource Center, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, KS, 66506-5502, USA
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12
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Lei YX, Yu K, Wang Y, Fan X, Kang HY, Sha LN, Zhou YH, Zhang HQ. Molecular cloning of HMW glutenin subunits from Roegneria kamoji (Poaceae: Triticeae). Biologia (Bratisl) 2016. [DOI: 10.1515/biolog-2016-0055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Gong W, Gong W, Han R, Li G, Sehgal SK, Li H, Liu A, Song J, Song G, Liu C, Liu J. Chromosome arm-specific markers from Aegilops searsii permits targeted introgression. Biologia (Bratisl) 2016. [DOI: 10.1515/biolog-2016-0003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Li X, Liu DC, Sun JZ, Yang WL, Guo XL, Wang DW, Zhang AM. Characterization of novel high-molecular-weight glutenin subunits and their coding sequences in Aegilops markgrafii. J Cereal Sci 2015. [DOI: 10.1016/j.jcs.2015.05.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Novel LMW glutenin subunit genes from wild emmer wheat (Triticum turgidum ssp. dicoccoides) in relation to Glu-3 evolution. Dev Genes Evol 2014; 225:31-7. [DOI: 10.1007/s00427-014-0484-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 11/13/2014] [Indexed: 10/24/2022]
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16
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Qin L, Liang Y, Yang D, Xia G, Liu S. Characterisation of low molecular weight glutenin subunit genes from Pseudoroegneria spicata and Pd. strigosa. J Appl Genet 2014; 56:27-35. [PMID: 25099921 DOI: 10.1007/s13353-014-0229-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2014] [Revised: 06/17/2014] [Accepted: 06/23/2014] [Indexed: 10/24/2022]
Abstract
We report the characterisation of nine novel low molecular weight glutenin subunit (LMW-GS) genes from two Pseudoroegneria species, Pd. spicata and Pd. strigosa. We found that all nine LMW-GS genes possess the same primary structure shared by other published LMW-GS. Five genes encode LMW-i type subunits, three encode LMW-m type subunits and one encodes a peptide similar to B-3 hordeins of Hordeum chilense. No LMW-s type subunit genes were found in Pseudoroegneria. One subunit, PSt24-LMW-2, contains six conserved cysteine residues, and the other eight subunits all contain eight cysteine residues. We show that one cysteine residue is located in the signal peptide of PSt24-LMW-1, suggesting a mature peptide containing only seven cysteine residues. Phylogenetic analysis indicates that the LMW-GS genes from the St genome cluster together and suggests a distant relationship with LMW-GS of the A and B genomes of wheat. Slippage/unequal crossing over and illegitimate recombination are effective mechanisms for enriching variations of seed storage proteins.
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Affiliation(s)
- Lumin Qin
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan, 250100, People's Republic of China
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17
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Kong L, Liang Y, Qin L, Sun L, Xia G, Liu S. Characterization of high molecular weight glutenin subunit genes from the Ns genome of Psathyrostachys juncea. Dev Genes Evol 2014; 224:189-96. [PMID: 25081411 DOI: 10.1007/s00427-014-0477-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 07/17/2014] [Indexed: 10/25/2022]
Abstract
The Ns genome of the genus Psathyrostachys possesses superior traits useful for wheat improvement. However, very little is known about the high molecular weight (HMW) subunits of glutenin encoded by the Ns genome. In this paper, we report the isolation of four alleles of HMW glutenin subunit gene from Psathyrostachys juncea. Sequence alignment data shows the four alleles have similar primary structure with those in wheat and other wheat-related grasses, with some unique modifications. All four sequences more closely resemble y-type, rather than x-type, glutenins. However, our results show three of the subunits (1Ns2-4) contain an extra glutamine residue in the N-terminal region not found on typical y-type subunits, as well as the x-type subunit specific sequence LAAQLPAMCRL. These three subunits likely represent an intermediate state in the divergence between x- and y-type subunits. Results also indicate that the Ns genome is more closely related to the St genome of Pseudoroegneria than any other Triticeae genomes.
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Affiliation(s)
- Lina Kong
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan, 250100, People's Republic of China
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18
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Jiang QT, Zhang XW, Ma J, Wei L, Zhao S, Zhao QZ, Qi PF, Lu ZX, Zheng YL, Wei YM. Characterization of high-molecular-weight glutenin subunits from Eremopyrum bonaepartis and identification of a novel variant with unusual high molecular weight and altered cysteine residues. PLANTA 2014; 239:865-875. [PMID: 24395202 DOI: 10.1007/s00425-013-2021-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 12/09/2013] [Indexed: 06/03/2023]
Abstract
We characterized two high-molecular-weight glutenin subunit (HMW-GS) variants from Eremopyrum bonaepartis, determined their complete open reading frames, and further expressed them in a bacterial system. The variants have many novel structural features compared with typical subunits encoded by Glu-1 loci: 1Fx3.7 and 1Fy1.5 exhibit hybrid properties of x- and y-type subunits. In addition, unusual molecular mass and altered number and distribution of cysteine residues were unique features of HMW-GSs encoded by Glu-F1 from E. bonaepartis. The mature 1Fx3.7 subunit has a full length of 1,223 amino acid residues, making it the largest subunit found thus far, while 1Fy1.5 is just 496 residues. In addition, the mutated PGQQ repeat motif was found in the repetitive region of 1Fx3.7. Although it has a similar molecular mass to that previously reported for 1Dx2.2, 1Dx2.2* and 1S(sh)x2.9 subunits, 1Fx3.7 appears to have had a different evolutionary history. The N-terminal and repetitive regions have a total of four additional cysteine residues, giving 1Fx3.7 a total of eight cysteines, while 1Fy1.5 has only six cysteines because the GHCPTSPQQ nonapeptide at the end of the repetitive region is deleted. With its extra cysteine residues and the longest repetitive region, features that are relevant to good wheat quality, the 1Fx3.7 subunit gene could be an excellent candidate for applications in wheat quality improvement.
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Affiliation(s)
- Qian-Tao Jiang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
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Ruiqi Z, Mingyi Z, Xiue W, Peidu C. Introduction of chromosome segment carrying the seed storage protein genes from chromosome 1V of Dasypyrum villosum showed positive effect on bread-making quality of common wheat. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2014; 127:523-533. [PMID: 24408374 DOI: 10.1007/s00122-013-2244-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Accepted: 11/20/2013] [Indexed: 06/03/2023]
Abstract
Development of wheat- D. villosum 1V#4 translocation lines; physically mapping the Glu - V1 and Gli - V1 / Glu - V3 loci; and assess the effects of the introduced Glu - V1 and Gli - V1 / Glu - V3 on wheat bread-making quality. Glu-V1 and Gli-V1/Glu-V3 loci, located in the chromosome 1V of Dasypyrum villosum, were proved to have positive effects on grain quality. However, there are very few reports about the transfer of the D. villosum-derived seed storage protein genes into wheat background by chromosome manipulation. In the present study, a total of six CS-1V#4 introgression lines with different alien-fragment sizes were developed through ionizing radiation of the mature female gametes of CS--D. villosum 1V#4 disomic addition line and confirmed by cytogenetic analysis. Genomic in situ hybridization (GISH), chromosome C-banding, twelve 1V#4-specific EST-STS markers and seed storage protein analysis enabled the cytological physical mapping of Glu-V1 and Gli-V1/Glu-V3 loci to the region of FL 0.50-1.00 of 1V#4S of D. villosum. The Glu-V1 allele of D. villosum was Glu-V1a and its coded protein was V71 subunit. Quality analysis indicated that Glu-V1a together with Gli-V1/Glu-V3 loci showed a positive effect on protein content, Zeleny sedimentation value and the rheological characteristics of wheat flour dough. In addition, the positive effect could be maintained when specific Glu-V1 and Gli-V1/Glu-V3 loci were transferred to the wheat genetic background as in the case of T1V#4S-6BS · 6BL, T1V#4S · 1BL and T1V#4S · 1DS translocation lines. These results showed that the chromosome segment carrying the Glu-V1 and Gli-V1/Glu-V3 loci in 1V#4S of D. villosum had positive effect on bread-making quality, and the T1V#4S-6BS · 6BL and T1V#4S · 1BL translocation lines could be useful germplasms for bread wheat improvement. The developed 1V#4S-specific molecular markers could be used to rapidly identify and trace the alien chromatin of 1V#4S in wheat background.
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Affiliation(s)
- Zhang Ruiqi
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Cytogenetics Institute, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China
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20
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Cao S, Li Z, Gong C, Xu H, Yang R, Hao S, Wang X, Wang D, Zhang X. Identification and characterization of high-molecular-weight glutenin subunits from Agropyron intermedium. PLoS One 2014; 9:e87477. [PMID: 24503781 PMCID: PMC3913593 DOI: 10.1371/journal.pone.0087477] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Accepted: 12/23/2013] [Indexed: 11/18/2022] Open
Abstract
High-molecular-weight glutenin subunit (HMW-GS) is a primary determinant of processing quality of wheat. Considerable progress has been made in understanding the structure, function and genetic regulation of HMW-GS in wheat and some of its related species, but less is known about their orthologs in Agropyron intermedium, a useful related species for wheat improvement. Here seven HMW-GSs in Ag. intermedium were identified using SDS-PAGE and Western blotting experiments. Subsequently, the seven genes (Glu-1Aix1 ∼ 4 and Glu-1Aiy1 ∼ 3) encoding the seven HMW-GSs were isolated using PCR technique with degenerate primers, and confirmed by bacterial expression and Western blotting. Sequence analysis indicated that the seven Ag. intermedium HMW-GSs shared high similarity in primary structure to those of wheat, but four of the seven subunits were unusually small compared to the representatives of HMW-GS from wheat and two of them possessed extra cysteine residues. The alignment and clustering analysis of deduced amino acid sequences revealed that 1Aix1 and 1Aiy1 subunits had special molecular structure, belonging to the hybrid type compounding between typical x- and y-type subunit. The xy-type subunit 1Aix1 is composed of the N-terminal of x-type and C-terminal of y-type, whereas yx-type subunit 1Aiy1 comprises the N-terminal of y-type and C-terminal of x-type. This result strongly supported the hypothesis of unequal crossover mechanism that might generate the novel coding sequence for the hybrid type of HMW-GSs. In addition to the aforementioned, the other novel characteristics of the seven subunits were also discussed. Finally, phylogenetic analysis based on HMW-GS genes was carried out and provided new insights into the evolutionary biology of Ag. intermedium.
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Affiliation(s)
- Shuanghe Cao
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Zhixin Li
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- College of Agriculture, Yangtze University, Jingzhou, Hubei, China
| | - Caiyan Gong
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Hong Xu
- College of life sciences, Northwest Sci-Tech University of Agriculture and Forestry, Yangling, Shanxi, China
| | - Ran Yang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Shanting Hao
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xianping Wang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Daowen Wang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Xiangqi Zhang
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
- * E-mail:
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Guo XH, Bi ZG, Wu BH, Wang ZZ, Hu JL, Zheng YL, Liu DC. ChAy/Bx, a novel chimeric high-molecular-weight glutenin subunit gene apparently created by homoeologous recombination in Triticum turgidum ssp. dicoccoides. Gene 2013; 531:318-25. [DOI: 10.1016/j.gene.2013.08.073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 08/14/2013] [Accepted: 08/21/2013] [Indexed: 12/18/2022]
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22
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Wang S, Yu Z, Cao M, Shen X, Li N, Li X, Ma W, Weißgerber H, Zeller F, Hsam S, Yan Y. Molecular mechanisms of HMW glutenin subunits from 1S(l) genome of Aegilops longissima positively affecting wheat breadmaking quality. PLoS One 2013; 8:e58947. [PMID: 23593125 PMCID: PMC3617193 DOI: 10.1371/journal.pone.0058947] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Accepted: 02/11/2013] [Indexed: 11/19/2022] Open
Abstract
A wheat cultivar “Chinese Spring” chromosome substitution line CS-1Sl(1B), in which the 1B chromosome was substituted by 1Sl from Aegilops longissima, was developed and found to possess superior dough and breadmaking quality. The molecular mechanism of its super quality conformation is studied in the aspects of high molecular glutenin genes, protein accumulation patterns, glutenin polymeric proteins, protein bodies, starch granules, and protein disulfide isomerase (PDI) and PDI-like protein expressions. Results showed that the introduced HMW-GS 1Sl×2.3* and 1Sly16* in the substitution line possesses long repetitive domain, making both be larger than any known x- and y-type subunits from B genome. The introduced subunit genes were also found to have a higher level of mRNA expressions during grain development, resulting in more HMW-GS accumulation in the mature grains. A higher abundance of PDI and PDI-like proteins was observed which possess a known function of assisting disulfide bond formation. Larger HMW-GS deposited in protein bodies were also found in the substitution line. The CS substitution line is expected to be highly valuable in wheat quality improvement since the novel HMW-GS are located on chromosome 1Sl, making it possible to combine with the known superior D×5+Dy10 subunits encoded by Glu-D1 for developing high quality bread wheat.
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Affiliation(s)
- Shunli Wang
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zitong Yu
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Min Cao
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Xixi Shen
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Ning Li
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Xiaohui Li
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
| | - Wujun Ma
- State Agriculture Biotechnology Centre, Murdoch University, Western Australian Department of Agriculture and Food, Perth, Western Australia, Australia
- * E-mail: (YY); (WM)
| | - H. Weißgerber
- Division of Plant Breeding and Applied Genetics, Technical University of Munich, Freising-Weihenstephan, Germany
| | - Friedrich Zeller
- Division of Plant Breeding and Applied Genetics, Technical University of Munich, Freising-Weihenstephan, Germany
| | - Sai Hsam
- Division of Plant Breeding and Applied Genetics, Technical University of Munich, Freising-Weihenstephan, Germany
| | - Yueming Yan
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, Beijing, China
- * E-mail: (YY); (WM)
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Wang S, Wang K, Chen G, Lv D, Han X, Yu Z, Li X, Ye X, Hsam SLK, Ma W, Appels R, Yan Y. Molecular characterization of LMW-GS genes in Brachypodium distachyon L. reveals highly conserved Glu-3 loci in Triticum and related species. BMC PLANT BIOLOGY 2012; 12:221. [PMID: 23171363 PMCID: PMC3547698 DOI: 10.1186/1471-2229-12-221] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 10/30/2012] [Indexed: 05/08/2023]
Abstract
BACKGROUND Brachypodium distachyon L. is a newly emerging model plant system for temperate cereal crop species. However, its grain protein compositions are still not clear. In the current study, we carried out a detailed proteomics and molecular genetics study on grain glutenin proteins in B. distachyon. RESULTS SDS-PAGE and RP-HPLC analysis of grain proteins showed that Brachypodium has few gliadins and high molecular weight glutenin subunits. In contrast the electrophoretic patterns for the albumin, globulin and low molecular weight glutenin subunit (LMW-GS) fractions of the grain protein were similar to those in wheat. In particular, the LMW-C type subunits in Brachypodium were more abundant than the equivalent proteins in common wheat. Southern blotting analysis confirmed that Brachypodium has 4-5 copies of LMW-GS genes. A total of 18 LMW-GS genes were cloned from Brachypodium by allele specific PCR. LMW-GS and 4 deduced amino acid sequences were further confirmed by using Western-blotting and MALDI-TOF-MS. Phylogenetic analysis indicated that Brachypodium was closer to Ae. markgrafii and Ae. umbellulata than to T. aestivum. CONCLUSIONS Brachypodium possessed a highly conserved Glu-3 locus that is closely related to Triticum and related species. The presence of LMW-GS in B. distachyon grains indicates that B. distachyon may be used as a model system for studying wheat quality attributes.
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Affiliation(s)
- Shunli Wang
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100048, Beijing, China
| | - Ke Wang
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, 100081, Beijing, China
| | - Guanxing Chen
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100048, Beijing, China
| | - Dongwen Lv
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100048, Beijing, China
| | - Xiaofeng Han
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100048, Beijing, China
| | - Zitong Yu
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100048, Beijing, China
| | - Xiaohui Li
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100048, Beijing, China
| | - Xingguo Ye
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, 100081, Beijing, China
| | - SLK Hsam
- Division of Plant Breeding and Applied Genetics, Technical University of Munich, D-85350, Freising-Weihenstephan, Germany
| | - Wujun Ma
- State Agriculture Biotechnology Centre, Murdoch University; Western Australian Department of Agriculture and Food, Perth, WA, 6150, Australia
| | - Rudi Appels
- State Agriculture Biotechnology Centre, Murdoch University; Western Australian Department of Agriculture and Food, Perth, WA, 6150, Australia
| | - Yueming Yan
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100048, Beijing, China
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Jiang QT, Ma J, Wei YM, Liu YX, Lan XJ, Dai SF, Lu ZX, Zhao S, Zhao QZ, Zheng YL. Novel variants of HMW glutenin subunits from Aegilops section Sitopsis species in relation to evolution and wheat breeding. BMC PLANT BIOLOGY 2012; 12:73. [PMID: 22646663 PMCID: PMC3441382 DOI: 10.1186/1471-2229-12-73] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 05/11/2012] [Indexed: 05/31/2023]
Abstract
BACKGROUND High molecular weight glutenin subunits (HMW-GSs), encoded by the genes at Glu-1 loci in wheat and its related species, are significant in the determination of grain processing quality. However, the diversity and variations of HMW-GSs are relatively low in bread wheat. More interests are now focused on wheat wild relatives in Triticeae. The genus Aegilops represents an important germplasm for novel HWM-GSs and other useful genes for wheat genetic improvement. RESULTS Six novel Glu-1 alleles and HMW-GSs were identified and characterized from three species of Aegilops section Sitopsis (S genome). Both open reading frames (ORFs) and promoter regions of these Glu-1 alleles were sequenced and characterized. The ORFs of Sitopsis Glu-1 genes are approximately 2.9 kb and 2.3 kb for x-type and y-type subunits, respectively. Although the primary structures of Sitopsis HMW-GSs are similar to those of previously reported ones, all six x-type or y-type subunits have the large fragment insertions. Our comparative analyses of the deduced amino acid sequences verified that Aegilops section Sitopsis species encode novel HMW-GSs with their molecular weights larger than almost all other known HMW-GSs. The Glu-1 promoter sequences share the high homology among S genome. Our phylogenetic analyses by both network and NJ tree indicated that there is a close phylogenetic evolutionary relationship of x-type and y-type subunit between S and D genome. CONCLUSIONS The large molecular weight of HMW-GSs from S genome is a unique feature identified in this study. Such large subunits are resulted from the duplications of repetitive domains in Sitopsis HMW-GSs. The unequal crossover events are the most likely mechanism of variations in glutenin subunits. The S genome-encoded subunits, 1Dx2.2 and 1Dx2.2* have independent origins, although they share similar evolutionary mechanism. As HMW-GSs play a key role in wheat baking quality, these large Sitopsis glutenin subunits can be used as special genetic resources for wheat quality improvement.
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Affiliation(s)
- Qian-Tao Jiang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Jian Ma
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yu-Ming Wei
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Ya-Xi Liu
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Xiu-Jin Lan
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Shou-Fen Dai
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Zhen-Xiang Lu
- Lethbridge Research Centre, Agriculture and Agri-Food Canada, Lethbridge, T1J 4B1, Canada
| | - Shan Zhao
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Quan-Zhi Zhao
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - You-Liang Zheng
- Key Laboratory of Southwestern Crop Germplasm Utilization, Ministry of Agriculture, Sichuan Agricultural University, Ya’an, Sichuan, 625014, China
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Li F, Jiang X, Wei Y, Xia G, Liu S. Characterization of a novel type of HMW subunit of glutenin from Australopyrum retrofractum. Gene 2012; 492:65-70. [PMID: 22115575 DOI: 10.1016/j.gene.2011.11.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 11/02/2011] [Accepted: 11/03/2011] [Indexed: 11/27/2022]
Abstract
The Triticeae species Australopyrum retrofractum (genome WW) produces a single high molecular weight glutenin subunit (HMW-GS) in its endosperm. However, degenerate PCR amplification of its genome DNA revealed the presence of two related HMW-GS sequences, each consisting of an open reading frame. One of these (Glu-W1-2) has not previously been reported. Here, we sequenced Glu-W1-2 and showed that it encodes the same type of HMW-GS as Glu-W1-1, although its overall product length was much shorter, because the number of certain repetitive motifs was lower in its central region. Both A. retrofractum HMW-GSs have a unique repetitive motif, which differentiates them from other known x- and y-type subunits present in Triticeae species. We suggest that A. retrofractum must have diverged from the main Triticeae lineage prior to the Glu-1 duplication event which led to the evolution of the x- and y-type genes.
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Affiliation(s)
- Fei Li
- The Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan 250100, PR China
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26
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Liu W, Jin Y, Rouse M, Friebe B, Gill B, Pumphrey MO. Development and characterization of wheat-Ae. searsii Robertsonian translocations and a recombinant chromosome conferring resistance to stem rust. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2011; 122:1537-45. [PMID: 21347655 DOI: 10.1007/s00122-011-1553-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 02/05/2011] [Indexed: 05/23/2023]
Abstract
The emergence of a new highly virulent race of stem rust (Puccinia graminis tritici), Ug99, rapid evolution of new Ug99 derivative races overcoming resistance of widely deployed genes, and spread towards important wheat growing areas now potentially threaten world food security. Exploiting novel genes effective against Ug99 from wild relatives of wheat is one of the most promising strategies for the protection of the wheat crop. A new source of resistance to Ug99 was identified in the short arm of the Aegilops searsii chromosome 3S(s) by screening wheat- Ae. searsii introgression libraries available as individual chromosome and chromosome arm additions to the wheat genome. For transferring this resistance gene into common wheat, we produced three double-monosomic chromosome populations (3A/3S(s), 3B/3S(s) and 3D/3S(s)) and then applied integrated stem rust screening, molecular maker analysis, and cytogenetic analysis to identify resistant wheat-Ae. searsii Robertsonian translocation. Three Robertsonian translocations (T3AL·3S(s)S, T3BL·3S(s)S and T3DL·3S(s)S) and one recombinant (T3DS-3S(s)S·3S(s)L) with stem rust resistance were identified and confirmed to be genetically compensating on the basis of genomic in situ hybridization, analysis of 3A, 3B, 3D and 3S(s)S-specific SSR/STS-PCR markers, and C-banding. In addition, nine SSR/STS-PCR markers of 3S(s)S-specific were developed for marker-assisted selection of the resistant gene. Efforts to reduce potential linkage drag associated with 3S(s)S of Ae. searsii are currently under way.
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Affiliation(s)
- Wenxuan Liu
- Wheat Genetic and Genomic Resources Center, Department of Plant Pathology, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, KS 66506-5502, USA
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Jiang QT, Wei YM, Lu ZX, Pu ZE, Lan XJ, Zheng YL. Structural variation and evolutionary relationship of novel HMW glutenin subunits from Elymus glaucus. Hereditas 2010; 147:136-41. [PMID: 20626769 DOI: 10.1111/j.1601-5223.2010.02182.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
High molecular weight (HMW) glutenin subunits (GS) are important seed storage proteins relevant to the end-use quality of wheat and other cereal crops. Here we report the isolation and characterization of two novel HMW-GS alleles (1St 1.4 and 1St1.1) from the perennial Triticeae species Elymus glaucus. The amino acid (aa) sequences of E. glaucus 1St1.4 and 1St1.1 were predicted as 434 aa and 358 aa, respectively. Both subunits comprise a signal peptide with a conserved N-terminal domain, a central repetitive domain and a C-terminal domain. Elymus glaucus 1St 1.4 and 1St1.1 exhibit several distinct characteristics different from other known HMW-GSs. The lengths of repetitive domains in E. glaucus 1St 1.4 and 1St1.1 are substantially smaller than those of other known HMW-GSs, in which 1St1.1 (only 358 aa) is the smallest subunit identified so far. The N-terminal domains of E. glaucus 1St 1.4 and 1St1.1 are homologous to y-type subunits, whereas their C-terminal domains are similar to x-type subunits. Our results indicate that E. glaucus 1St 1.4 and 1St1.1 are novel HMW-GS variants or isoforms, and the characterization of both subunits can enhance our understanding on the structural differentiation and evolutionary relationship of HMW-GSs in Triticeae species.
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Affiliation(s)
- Qian-Tao Jiang
- Triticeae Research Institute, Sichuan Agricultural University, Ya'an, Sichuan, PR China
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28
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Garg M, Tanaka H, Ishikawa N, Takata K, Yanaka M, Tsujimoto H. A Novel Pair of HMW Glutenin Subunits fromAegilops searsiiImproves Quality of Hexaploid Wheat. Cereal Chem 2009. [DOI: 10.1094/cchem-86-1-0026] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Monika Garg
- Laboratory of Plant Genetics and Breeding Science, Faculty of Agriculture, Tottori University, Tottori, 680-8553 Japan
| | - Hiroyuki Tanaka
- Laboratory of Plant Genetics and Breeding Science, Faculty of Agriculture, Tottori University, Tottori, 680-8553 Japan
| | - Naoyuki Ishikawa
- National Agricultural Research Center for Western Region, Fukuyama, 721-8514 Japan
| | - Kanenori Takata
- National Agricultural Research Center for Western Region, Fukuyama, 721-8514 Japan
| | - Mikiko Yanaka
- National Agricultural Research Center for Western Region, Fukuyama, 721-8514 Japan
| | - Hisashi Tsujimoto
- Laboratory of Plant Genetics and Breeding Science, Faculty of Agriculture, Tottori University, Tottori, 680-8553 Japan
- Corresponding author. Phone: +81-857-315352. Fax: +81-857-315352. E-mail:
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Li Z, Zhang X, Zhang H, Cao S, Wang D, Hao S, Li L, Li H, Wang X. Isolation and characterization of a novel variant of HMW glutenin subunit gene from the St genome of Pseudoroegneria stipifolia. J Cereal Sci 2008. [DOI: 10.1016/j.jcs.2007.05.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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31
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Li X, Zhang Y, Gao L, Wang A, Ji K, He Z, Appels R, Ma W, Yan Y. Molecular cloning, heterologous expression, and phylogenetic analysis of a novel y-type HMW glutenin subunit gene from the G genome of Triticum timopheevi. Genome 2008; 50:1130-40. [PMID: 18059540 DOI: 10.1139/g07-089] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel y-type high molecular weight (HMW) glutenin subunit gene from the G genome of Triticum timopheevi (2n=4x=28, AAGG) was isolated and characterized. Genomic DNA from accession CWI17006 was amplified and a 2200 bp fragment was obtained. Sequence analysis revealed a complete open reading frame including N- and C-terminal ends and a central repetitive domain encoding 565 amino acid residues. The molecular weight of the deduced subunit was 77,031, close to that of the x-type glutenin subunits. Its mature protein structure, however, demonstrated that it was a typical y-type HMW subunit. To our knowledge, this is the largest y-type subunit gene among Triticum genomes. The molecular structure and phylogenetic analysis assigned it to the G genome and it is the first characterized y-type HMW glutenin subunit gene from T. timopheevi. Comparative analysis and secondary structure prediction showed that the subunit possessed some unique characters, especially 2 large insertions of 45 (6 hexapeptides and a nonapeptide) and 12 (2 hexapeptides) amino acid residues that mainly contributed to its higher molecular weight and allowed more coils to be formed in its tertiary structure. Additionally, more alpha-helixes in the repeat domain of the subunit were found when compared with 3 other y-type subunits. We speculate that these structural characteristics improve the formation of gluten polymer. The novel subunit, expressed as a fusion protein in E. coli, moved more slowly in SDS-PAGE than the subunit Bx7, so it was designated Gy7*. As indicated in previous studies, increased size and more numerous coils and alpha-helixes of the repetitive domain might enhance the functional properties of HMW glutenins. Consequently, the novel Gy7* gene could have greater potential for improving wheat quality.
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Affiliation(s)
- Xiaohui Li
- Key Laboratory of Genetics and Biotechnology, College of Life Science, Capital Normal University, 100037 Beijing, China
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Liu S, Gao X, Xia G. Characterizing HMW-GS alleles of decaploid Agropyron elongatum in relation to evolution and wheat breeding. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2008; 116:325-34. [PMID: 17992503 PMCID: PMC2226004 DOI: 10.1007/s00122-007-0669-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2007] [Accepted: 10/23/2007] [Indexed: 05/13/2023]
Abstract
Bread wheat quality is mainly correlated with high molecular weight glutenin subunits (HMW-GS) of endosperm. The number of HMW-GS alleles with good processing quality is limited in bread wheat cultivars, while there are plenty of HMW-GS alleles in wheat-related grasses to exploit. We report here on the cloning and characterization of HMW-GS alleles from the decaploid Agropyron elongatum. Eleven novel HMW-GS alleles were cloned from the grass. Of them, five are x-type and six y-type glutenin subunit genes. Three alleles Aex4, Aey7, and Aey9 showed high similarity with another three alleles from the diploid Lophopyrum elongatum, which provided direct evidence for the Ee genome origination of A. elongatum. It was noted that C-terminal regions of three alleles of the y-type genes Aey8, Aey9, and Aey10 showed more similarity with x-type genes than with other y-type genes. This demonstrates that there is a kind of intermediate state that appeared in the divergence between x- and y-type genes in the HMW-GS evolution. One x-type subunit, Aex4, with an additional cysteine residue, was speculated to be correlated with the good processing quality of wheat introgression lines. Aey4 was deduced to be a chimeric gene from the recombination between another two genes. How the HMW-GS genes of A. elongatum may contribute to the improvement of wheat processing quality are discussed.
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Affiliation(s)
- Shuwei Liu
- School of Life Sciences, Shandong University, 250100 Jinan, People’s Republic of China
| | - Xin Gao
- School of Life Sciences, Shandong University, 250100 Jinan, People’s Republic of China
| | - Guangmin Xia
- School of Life Sciences, Shandong University, 250100 Jinan, People’s Republic of China
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Zhang Y, Li X, Wang A, An X, Zhang Q, Pei Y, Gao L, Ma W, Appels R, Yan Y. Novel x-type high-molecular-weight glutenin genes from Aegilops tauschii and their implications on the wheat origin and evolution mechanism of Glu-D1-1 proteins. Genetics 2008; 178:23-33. [PMID: 18202355 PMCID: PMC2206073 DOI: 10.1534/genetics.107.077412] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Accepted: 10/07/2007] [Indexed: 11/18/2022] Open
Abstract
Two new x-type high-molecular-weight glutenin subunits with similar size to 1Dx5, designated 1Dx5*t and 1Dx5.1*t in Aegilops tauschii, were identified by SDS-PAGE, RP-HPLC, and MALDI-TOF-MS. The coding sequences were isolated by AS-PCR and the complete ORFs were obtained. Allele 1Dx5*t consists of 2481 bp encoding a mature protein of 827 residues with deduced Mr of 85,782 Da whereas 1Dx5.1*t comprises 2526 bp encoding 842 residues with Mr of 87,663 Da. The deduced Mr's of both genes were consistent with those determined by MALDI-TOF-MS. Molecular structure analysis showed that the repeat motifs of 1Dx5*t were correspondingly closer to the consensus compared to 1Dx5.1*t and 1Dx5 subunits. A total of 11 SNPs (3 in 1Dx5*t and 8 in 1Dx5.1*t) and two indels in 1Dx5*t were identified, among which 8 SNPs were due to C-T or A-G transitions (an average of 73%). Expression of the cloned ORFs and N-terminal sequencing confirmed the authenticities of the two genes. Interestingly, several hybrid clones of 1Dx5*t expressed a slightly smaller protein relative to the authentic subunit present in seed proteins; this was confirmed to result from a deletion of 180 bp through illegitimate recombination as well as an in-frame stop codon. Network analysis demonstrated that 1Dx5*t, 1Dx2t, 1Dx1.6t, and 1Dx2.2* represent a root within a network and correspond to the common ancestors of the other Glu-D-1-1 alleles in an associated star-like phylogeny, suggesting that there were at least four independent origins of hexaploid wheat. In addition to unequal homologous recombination, duplication and deletion of large fragments occurring in Glu-D-1-1 alleles were attributed to illegitimate recombination.
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Affiliation(s)
- Yanzhen Zhang
- Key Laboratory of Genetics and Biotechnology, College of Life Sciences, Capital Normal University, Beijing, China
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Liu X, Qian W, Liu X, Qin H, Wang D. Molecular and functional analysis of hypoxanthine-guanine phosphoribosyltransferase from Arabidopsis thaliana. THE NEW PHYTOLOGIST 2007; 175:448-461. [PMID: 17635220 DOI: 10.1111/j.1469-8137.2007.02117.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Hypoxanthine-guanine phosphoribosyltransferase (HGPT) occurs in both eukaryotic and prokaryotic organisms. However, the molecular and functional properties of plant HGPT are not well understood. In this study, it was found that the putative HGPT proteins from dicot and monocot plant species exhibited significant identities to their homologs from other cellular organisms. Ectopic expression of the HGPTs from Arabidopsis, soybean or wheat complemented HGPT deficiency in the hpt1 mutant of Saccharomyces cerevisiae. Recombinant Arabidopsis HGPT (AtHGPT) catalyzed both forward and reverse reactions in in vitro biochemical assays. The relative catalytic efficiency for the synthesis of guanosine monophosphate (GMP) was significantly greater than that for the production of guanine from GMP. Further investigations led to identification of the candidate residues that may form the pyrophosphate (PPi) binding loop in AtHGPT. AtHGPT expression level was dynamically regulated in Arabidopsis organs and during leaf development and senescence and seed germination. AtHGPT knockout mutant germinated more slowly than wild type control, whereas its overexpression mutant exhibited accelerated germination. Collectively, the data suggest that functional HGPTs are expressed in higher plants. In Arabidopsis, HGPT plays an active role in the salvage of purine bases and its activity is required for efficient seed germination.
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Affiliation(s)
- Xueying Liu
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School of Chinese Academy of Sciences, Beijing 100039, China
| | - Weiqiang Qian
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
- Graduate School of Chinese Academy of Sciences, Beijing 100039, China
| | - Xin Liu
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Huanju Qin
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Daowen Wang
- The State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
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