Genome analysis of Taraxacum kok-saghyz Rodin provides new insights into rubber biosynthesis

查看全文 作　　者：Tao [1]Lin;Xia [1]Xu;Jue [2]Ruan;Shizhong [3]Liu;Shigang [2]Wu;Xiujuan [2]Shao;Xiaobo [2]Wang;Lin [3]Gan;Bi [3]Qin;Yushuang [3]Yang;Zhukuan [1]Cheng;Suhua [4]Yang;Zhonghua [5]Zhang;Guosheng [2]Xiong;Sanwen [2]Huang;Hong [1]Yu;Jiayang [1,6]Li

机构地区：[1]State Key Laboratory of Plant Genomics and National Center for Plant Gene Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,beijing 100101,china;[2]Genome Analysis Laboratory of the Ministry of Agriculture,Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,shenzhen 518120,china;[3]The Key Laboratory of Biology and Genetic Resources of Rubber Tree,Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,danzhou 571737,china;[4]Key Laboratory of Plant Molecular Physiology,Institute of Botany,Chinese Academy of Sciences,beijing 100093,china;[5]Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture,Sino-Dutch Joint Laboratory of Horticultural Genomics,Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,beijing 100081,china;[6]University of the Chinese Academy of Sciences,beijing 100049,china

出　　处：《National Science Review》索引2018年第5卷第1期,共10页

基　　金：supported by grants from the Institute of Genetics and Developmental Biology;National Postdoctoral Program for Innovative Talents(BX201600191);State Key Laboratory of Plant Genomics 摘　　要：The Russian dandelion Taraxacum kok-saghyz Rodin(TKS), a member of the Composite family and a potential alternative source of natural rubber(NR) and inulin, is an ideal model system for studying rubber biosynthesis. Here we present the draft genome of TKS, the first assembled NR-producing weed plant. The draft TKS genome assembly has a length of 1.29 Gb, containing 46 731 predicted protein-coding genes and68.56% repeats, in which the LTR-RT elements predominantly contribute to the genome enlargement. We analyzed the heterozygous regions/genes, suggesting its possible involvement in inbreeding depression.Through comparative studies between rubber-producing and non-rubber-producing plants, we found that enzymes of the mevalonate(MVA) pathway and rubber elongation might be critical for rubber biosynthesis, and several key isoforms have been isolated and shown to be predominantly expressed in the latex, indicating their crucial functions in rubber biosynthesis. Moreover, for two important families in rubber elongation, the CPT/CPTL and REF/SRPP families, diverse evolutionary tracks have been revealed. These results provide valuable resources and new insights into the mechanism of NR biosynthesis,and facilitate the development of alternative NR-producing crops. 关键词：Taraxacum kok-saghyz GENOMICS rubber biosynthesis CPT/CPTL REF/SRPP

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Genome analysis of Taraxacum kok-saghyz Rodin provides new insights into rubber biosynthesis

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