Two gap-free reference genomes and a global view of the centromere architecture in rice

查看全文 作　　者：Jia-Ming [1,2]Song;Wen-Zhao [1]Xie;Shuo [1]Wang;Yi-Xiong [1]Guo;Dal-Hoe [3]Koo;Dave [4]Kudrna;Chenbo [1]Gong;Yicheng [1]Huang;Jia-Wu [1]Feng;Wenhui [1]Zhang;Yong [5]Zhou;Andrea [5]Zuccolo;Evan [6]Long;Seunghee [4]Lee;Jayson [4]Talag;Run [1]Zhou;Xi-Tong [1]Zhu;Daojun [1]Yuan;Joshua [6,8]Udall;Weibo [1]Xie;Rod [4,5,7]AWing;Qifa [1]Zhang;Jesse [3]Poland;Jianwei [1]Zhang;Ling-Ling [1,2]Chen

机构地区：[1]National Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University,Wuhan 430070,China;[2]College of Life Science and Technology,Guangxi University,Nanning 530004,China;[3]Wheat Genetics Resource Center,Department of Plant Pathology,Kansas State University,Manhattan,KS,USA;[4]Arizona Genomics Institute,School of Plant Sciences,University of Arizona,Tucson,AZ 85721,USA;[5]Center for Desert Agriculture,Biological and Environmental Sciences&Engineering Division(BESE),King Abdullah University of Science and Technology(KAUST),Thuwal 23955-6900,Saudi Arabia;[6]Plant and Wildlife Science Department,Brigham Young University,Provo,UT 84602,USA;[7]International Rice Research Institute(IRRI),Strategic Innovation,Los Baños,4031 Laguna,Philippines;[8]Crop Germplasm Research Unit,USDA-ARS,2881 F&B Road,College Station,TX 77845,USA

出　　处：《Molecular Plant》索引2021年第14卷第10期,共11页

基　　金：This research was supported by the Natinal Key Research and Development Program of China(2016YFD0100904 and 2016YFD0100802);the National Natural Science Foundation of China(31871269);the Hubei Provincial Natural Science Foundation of China(2019CFA014);Fundamental Research Funds for the Central Universities(2662020SKPY010 to J.Z.). 摘　　要：Rice(Oryza sativa),a major staple throughout the world and a model system for plant genomics and breeding,was the first crop genome sequenced almost two decades ago.However,reference genomes for all higher organisms to date contain gaps and missing sequences.Here,we report the assembly and analysis of gap-free reference genome sequences for two elite O.sativa xian/indica rice varieties,Zhenshan 97 and Minghui 63,which are being used as a model system for studying heterosis and yield.Gap-free reference genomes provide the opportunity for a global view of the structure and function of centromeres.We show that all rice centromeric regions share conserved centromere-specific satellite motifs with different copy numbers and structures.In addition,the similarity of CentO repeats in the same chromosome is higher than across chromosomes,supporting a model of local expansion and homogenization.Both genomes have over 395 non-TE genes located in centromere regions,of which∼41%are actively transcribed.Two large structural variants at the end of chromosome 11 affect the copy number of resistance genes between the two genomes.The availability of the two gap-free genomes lays a solid foundation for further understanding genome structure and function in plants and breeding climate-resilient varieties. 关键词：rice genome ZS97 MH63 hybrid rice centromere architecture

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Two gap-free reference genomes and a global view of the centromere architecture in rice

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