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Genome Analysis of Taraxacum kok-saghyz Rodin Provides New Insights into Rubber Biosynthesis
Tao Lin, Xia Xu, Jue Ruan, Shizhong Liu, Shigang Wu, Xiujuan Shao, Xiaobo Wang, Lin Gan, Bi Qin, Yushuang Yang, Zhukuan Cheng, Suhua Yang, Zhonghua Zhang, Guosheng Xiong, Sanwen Huang, Hong Yu and Jiayang Li
National Science Review
Abstract
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 and 68.56% 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 showing 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.
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DOI:10.1093/nsr/nwx101 |
论文题目: |
Genome Analysis of Taraxacum kok-saghyz Rodin Provides New Insights into Rubber Biosynthesis |
英文论文题目: |
Genome Analysis of Taraxacum kok-saghyz Rodin Provides New Insights into Rubber Biosynthesis |
第一作者: |
Tao Lin, Xia Xu, Jue Ruan, Shizhong Liu, Shigang Wu, Xiujuan Shao, Xiaobo Wang, Lin Gan, Bi Qin, Yushuang Yang, Zhukuan Cheng, Suhua Yang, Zhonghua Zhang, Guosheng Xiong, Sanwen Huang, Hong Yu and Jiayang Li |
英文第一作者: |
Tao Lin, Xia Xu, Jue Ruan, Shizhong Liu, Shigang Wu, Xiujuan Shao, Xiaobo Wang, Lin Gan, Bi Qin, Yushuang Yang, Zhukuan Cheng, Suhua Yang, Zhonghua Zhang, Guosheng Xiong, Sanwen Huang, Hong Yu and Jiayang Li |
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2017-09-05 |
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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 and 68.56% 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 showing 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. |
英文摘要: |
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 and 68.56% 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 showing 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. |
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National Science Review |
英文刊物名称: |
National Science Review |
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其它备注: |
Tao Lin, Xia Xu, Jue Ruan, Shizhong Liu, Shigang Wu, Xiujuan Shao, Xiaobo Wang, Lin Gan, Bi Qin, Yushuang Yang, Zhukuan Cheng, Suhua Yang, Zhonghua Zhang, Guosheng Xiong, Sanwen Huang, Hong Yu and Jiayang Li. Genome Analysis of Taraxacum kok-saghyz Rodin Provides New Insights into Rubber Biosynthesis. National Science Review. DOI:10.1093/nsr/nwx101 |
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