A reference-guided TILLING by amplicon-sequencing platform supports forward and reverse genetics in barley  

作　　者：Congcong Jiang Miaomiao Lei Yu Guo Guangqi Gao Lijie Shi Yanlong Jin Yu Cai Axel Himmelbach Shenghui Zhou Qiang He Xuefeng Yao Jinhong Kan Georg Haberer Fengying Duan Lihui Li Jun Liu Jing Zhang Manuel Spannagl Chunming Liu Nils Stein Zongyun Feng Martin Mascher Ping Yang 

机构地区：[1]Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing,China [2]College of Agronomy,Sichuan Agricultural University,Chengdu,China [3]Leibniz Institute of Plant Genetics and Crop Plant Research(IPK),Seeland,Germany [4]Institute of Botany,Chinese Academy of Sciences,Beijing,China [5]Plant Genome and Systems Biology(PGSB),Helmholtz Center Munich,German Research Center for Environmental Health,Neuherberg,Germany

出　　处：《Plant Communications》2022年第4期37-53,共17页植物通讯（英文）

基　　金：funded by grants from the National Key Research and Development Program of China(2018YFD1000702/2018YFD1000700);the Agricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences(CAAS),China.

摘　　要：Barley is a diploid species with a genome smaller than those of other members of the Triticeae tribe,making it an attractive model for genetic studies in Triticeae crops.The recent development of barley genomics has created a need for a high-throughput platform to identify genetically uniform mutants for gene function investigations.In this study,we report an ethyl methanesulfonate(EMS)-mutagenized population consisting of 8525M_(3) lines in the barley landrace“Hatiexi”(HTX),which we complement with a high-quality de novo assembly of a reference genome for this genotype.The mutation rate within the population ranged from 1.51 to 4.09 mutations per megabase,depending on the treatment dosage of EMS and the mutation discrimination platform used for genotype analysis.We implemented a three-dimensional DNA pooling strategy combined with multiplexed amplicon sequencing to create a highly efficient and cost-effective TILLING(targeting induced locus lesion in genomes)platform in barley.Mutations were successfully identified from 72 mixed amplicons within a DNA pool containing 64 individual mutants and from 56 mixed amplicons within a pool containing 144 individuals.We discovered abundant allelic mutants for dozens of genes,including the barley Green Revolution contributor gene Brassinosteroid insensitive 1(BRI1).As a proof of concept,we rapidly determined the causal gene responsible for a chlorotic mutant by following the MutMap strategy,demonstrating the value of this resource to support forward and reverse genetic studies in barley.

关 键 词：BARLEY MUTAGENESIS TILLING amplicon-seq GENETICS 

分 类 号：S512[农业科学—作物学]