Site-specific transfer of chromosomal segments and genes in wheat engineered chromosomes

作     者：Jing Yuan Qinghua Shi Xiang Guo Yalin Liu Handong Su Xianrui Guo Zhenling Lv Fangpu Han 

作者机构：State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of SciencesBeijing 100049China 

基　　金：supported by the National Key Research and Development Program of China(2016YFD0102003) the Ministry of Science and Technology(MOST)Project(2016ZX08010002 and 2014ZX0801006B) 

出 版 物：《Journal of Genetics and Genomics》 (遗传学报（英文版）)

年 卷 期：2017年第44卷第11期

页      码：531-539页

摘      要：Recently, engineered minichromosomes have been produced using a telomere-mediated truncation technique in some plants. However, the study on transferring genes to minichromosomes is very ***, telomere-mediated truncation was successfully performed in common wheat（Triticum aestivum）to generate stable truncated chromosomes accompanied by a relatively high frequency of chromosomal rearrangements. After the cross between transgenic parents, a promoter-less DsRed gene in a chromosome from one parent was transferred to another chromosome from the other parent at the site behind a maize ubiquitin promoter via the Cre/lox system. DsRed transcripts and red fluorescent proteins were detected in the recombinant plants. In one such seedling, transgenic signals were detected at the centric terminus of chromosome 4D and the distal terminus of chromosome 3A. Clear translocations could be detected at the transgenic loci of these two chromosomes. Intriguingly, signals of centric-specific sequences were co-localized with the translocated D-group chromosomal segment in the terminal region of chromosome 3A. Our results indicate that the Cre/lox system induces the gene swapping to the target chromosome and non-homologous chromosomal recombination simultaneously. These approaches could offer a platform to transfer large DNA fragments or even terminal chromosomal segments to other chromosomes of the natural genome.

主 题 词：Telomere mediated truncation Engineered chromosome Crellox system Chromosomal recombination Chromosome translocation Triticum aestivum 

学科分类：0710[理学-生物科学类] 07[理学] 09[农学] 071007[071007] 0901[农学-植物生产类] 090102[090102] 

核心收录：

D　O　I：10.1016/j.jgg.2017.08.005

馆 藏 号：203279460...