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Triticum CRISPR

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https://www.readbyqxmd.com/read/30477421/targeted-mutagenesis-using-the-agrobacterium-tumefaciens-mediated-crispr-cas9-system-in-common-wheat
#1
Shujuan Zhang, Rongzhi Zhang, Guoqi Song, Jie Gao, Wei Li, Xiaodong Han, Mingli Chen, Yulian Li, Genying Li
BACKGROUND: Recently, the CRISPR/Cas9 system has been widely used to precisely edit plant genomes. Due to the difficulty in Agrobacterium-mediated genetic transformation of wheat, the reported applications in CRISPR/Cas9 system were all based on the biolistic transformation. RESULTS: In the present study, we efficiently applied targeted mutagenesis in common wheat (Triticum aestivum L.) protoplasts and transgenic T0 plants using the CRISPR/Cas9 system delivered via Agrobacterium tumefaciens...
November 26, 2018: BMC Plant Biology
https://www.readbyqxmd.com/read/30285624/efficient-generation-of-stable-heritable-gene-edits-in-wheat-using-crispr-cas9
#2
Rhian M Howells, Melanie Craze, Sarah Bowden, Emma J Wallington
BACKGROUND: The use of CRISPR/Cas9 systems could prove to be a valuable tool in crop research, providing the ability to fully knockout gene function in complex genomes or to precisely adjust gene function by knockout of individual alleles. RESULTS: We compare gene editing in hexaploid wheat (Triticum aestivum) with diploid barley (Hordeum vulgare), using a combination of single genome and tri-genome targeting. High efficiency gene editing, 11-17% for single genome targeted guides and 5% for tri-genome targeted guides, was achieved in wheat using stable Agrobacterium-mediated transformation...
October 3, 2018: BMC Plant Biology
https://www.readbyqxmd.com/read/29959585/concurrent-modifications-in-the-three-homeologs-of-ms45-gene-with-crispr-cas9-lead-to-rapid-generation-of-male-sterile-bread-wheat-triticum-aestivum-l
#3
Manjit Singh, Manish Kumar, Marc C Albertsen, Joshua K Young, A Mark Cigan
Hexaploid bread wheat is not readily amenable to traditional mutagenesis approaches. In this study, we show efficient utilization of CRISPR-Cas system and Next Generation Sequencing for mutant analysis in wheat. Identification and manipulation of male fertility genes in hexaploid bread wheat is important for understanding the molecular basis of pollen development and to obtain novel sources of nuclear genetic male sterility (NGMS). The maize Male sterile 45 (Ms45) gene encodes a strictosidine synthase-like enzyme and has been shown to be required for male fertility...
July 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/28502081/simultaneous-modification-of-three-homoeologs-of-taedr1-by-genome-editing-enhances-powdery-mildew-resistance-in-wheat
#4
Yunwei Zhang, Yang Bai, Guangheng Wu, Shenghao Zou, Yongfang Chen, Caixia Gao, Dingzhong Tang
Wheat (Triticum aestivum L.) incurs significant yield losses from powdery mildew, a major fungal disease caused by Blumeria graminis f. sp. tritici (Bgt). enhanced disease resistance1 (EDR1) plays a negative role in the defense response against powdery mildew in Arabidopsis thaliana; however, the edr1 mutant does not show constitutively activated defense responses. This makes EDR1 an ideal target for approaches using new genome-editing tools to improve resistance to powdery mildew. We cloned TaEDR1 from hexaploid wheat and found high similarity among the three homoeologs of EDR1...
August 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28244994/precise-base-editing-in-rice-wheat-and-maize-with-a-cas9-cytidine-deaminase-fusion
#5
Yuan Zong, Yanpeng Wang, Chao Li, Rui Zhang, Kunling Chen, Yidong Ran, Jin-Long Qiu, Daowen Wang, Caixia Gao
Targeted base editing in plants without the need for a foreign DNA donor or double-stranded DNA cleavage would accelerate genome modification and breeding in a wide array of crops. We used a CRISPR-Cas9 nickase-cytidine deaminase fusion to achieve targeted conversion of cytosine to thymine from position 3 to 9 within the protospacer in both protoplasts and regenerated rice, wheat and maize plants at frequencies of up to 43.48%.
May 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/25864460/diversification-of-the-celiac-disease-%C3%AE-gliadin-complex-in-wheat-a-33-mer-peptide-with-six-overlapping-epitopes-evolved-following-polyploidization
#6
Carmen V Ozuna, Julio C M Iehisa, María J Giménez, Juan B Alvarez, Carolina Sousa, Francisco Barro
The gluten proteins from wheat, barley and rye are responsible both for celiac disease (CD) and for non-celiac gluten sensitivity, two pathologies affecting up to 6-8% of the human population worldwide. The wheat α-gliadin proteins contain three major CD immunogenic peptides: p31-43, which induces the innate immune response; the 33-mer, formed by six overlapping copies of three highly stimulatory epitopes; and an additional DQ2.5-glia-α3 epitope which partially overlaps with the 33-mer. Next-generation sequencing (NGS) and Sanger sequencing of α-gliadin genes from diploid and polyploid wheat provided six types of α-gliadins (named 1-6) with strong differences in their frequencies in diploid and polyploid wheat, and in the presence and abundance of these CD immunogenic peptides...
June 2015: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/25232936/genome-editing-in-rice-and-wheat-using-the-crispr-cas-system
#7
Qiwei Shan, Yanpeng Wang, Jun Li, Caixia Gao
Targeted genome editing nucleases, such as zinc-finger nucleases (ZFNs) and transcription activator-like effector nucleases (TALENs), are powerful tools for understanding gene function and for developing valuable new traits in plants. The clustered regularly interspersed short palindromic repeats (CRISPR)/Cas system has recently emerged as an alternative nuclease-based method for efficient and versatile genome engineering. In this system, only the 20-nt targeting sequence within the single-guide RNA (sgRNA) needs to be changed to target different genes...
October 2014: Nature Protocols
https://www.readbyqxmd.com/read/25038773/simultaneous-editing-of-three-homoeoalleles-in-hexaploid-bread-wheat-confers-heritable-resistance-to-powdery-mildew
#8
Yanpeng Wang, Xi Cheng, Qiwei Shan, Yi Zhang, Jinxing Liu, Caixia Gao, Jin-Long Qiu
Sequence-specific nucleases have been applied to engineer targeted modifications in polyploid genomes, but simultaneous modification of multiple homoeoalleles has not been reported. Here we use transcription activator-like effector nuclease (TALEN) and clustered, regularly interspaced, short palindromic repeats (CRISPR)-Cas9 (refs. 4,5) technologies in hexaploid bread wheat to introduce targeted mutations in the three homoeoalleles that encode MILDEW-RESISTANCE LOCUS (MLO) proteins. Genetic redundancy has prevented evaluation of whether mutation of all three MLO alleles in bread wheat might confer resistance to powdery mildew, a trait not found in natural populations...
September 2014: Nature Biotechnology
https://www.readbyqxmd.com/read/24122057/rna-guided-genome-editing-for-target-gene-mutations-in-wheat
#9
Santosh Kumar Upadhyay, Jitesh Kumar, Anshu Alok, Rakesh Tuli
The clustered, regularly interspaced, short palindromic repeats (CRISPR) and CRISPR-associated protein (Cas) system has been used as an efficient tool for genome editing. We report the application of CRISPR-Cas-mediated genome editing to wheat (Triticum aestivum), the most important food crop plant with a very large and complex genome. The mutations were targeted in the inositol oxygenase (inox) and phytoene desaturase (pds) genes using cell suspension culture of wheat and in the pds gene in leaves of Nicotiana benthamiana...
December 2013: G3: Genes—Genomes—Genetics
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