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    Home > Food News > Food Articles > Important progress has been made in the analysis of rubber grass genome sequence

    Important progress has been made in the analysis of rubber grass genome sequence

    • Last Update: 2021-03-03
    • Source: Internet
    • Author: User
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    rubber is one of the world's four major industrial raw materials, weighing on the same weight as oil, steel and coal, with a global consumption of 12.14 million tons in 2015 and an output value of about $17 billion. Brazil's clergy rubber trees have always been the main source of natural rubber, but due to plant area constraints, increased production costs, narrow genetic background and serious pests and diseases, rubber production is becoming increasingly difficult to meet demand. China is a large consumer of natural rubber, and Brazil's three-leaf rubber tree can be planted in a very small area, resulting in China's external dependence has exceeded 80%. Therefore, the development of alternative resources for the production of natural rubber has important strategic significance and economic value.
    taraxacum kok-saghyz (TKS), also known as Russian dandelion, is a perennial twice as herb, with roots that synthesize high molecular weights of natural rubber and chrysanthemums. Due to its wide range of growth, high natural rubber content, short growth cycle, relatively simple genome and genetic transformation and gene editing is relatively easy, TKS is considered most likely to become an alternative to the production of natural rubber cash crops and scientific research model plants. Since the 21st century, countries around the world have set up natural rubber research programs, such as the United States "Program of Excellence", the European Union "Pearl Program" and "DRIVE4EU Plan", Germany's "RUBIN Program" and so on. In contrast, China has relatively little research. In April 2015, China's Dandelion Rubber Industry Technology Innovation Strategic Alliance was officially established.
    Against this background, the Li Jiayang Research Group of the Institute of Genetics and Developmental Biology of the Chinese Academy of Sciences independently assembled a high-quality rubber grass genome sketch with a size of 1.29Gb, containing more than 46,000 genes and a repeat sequence of 70% through PacBio Single Molecule Real-Time (SMRT) sequencing technology. The rubber grass genome is also the only herb in the plant that can produce high molecular weight rubber to sequence the genome. Through the comparative genomic study between rubber-producing plants and non-rubber-producing plants, the rubber synthesis path and chrysanthemum synthesis pathway in rubber grass were identified, and the evolution course of two important gene families, CPT/CPTL and REF/SRPP, in the process of rubber chain extension was expounded. In addition, possible candidate regions in the rubber grass genome associated with self-decline have been identified. The results mark the entry into the post-genome era of natural rubber synthesis research using rubber grass as a model plant, and will greatly accelerate the domestication of rubber grass from wild plants to cash crops and promote the development of China's natural rubber industry.
    results were published online August 26, 2017 in the authoritative academic journal
    (DOI:10.1093/nsr/nwx101). Lin Tao, Xu Xia, a postdoctoral fellow in the Lijiayang Research Group, and Yan Wei, a researcher at the Agricultural Genomics Research Institute of the Chinese Academy of Agricultural Sciences, are co-authors of the paper, and Li Jiayang and Yu Wei are associate researchers. The collaborators include Huang Sanwen, a researcher at the Agricultural Genomics Research Institute of the Chinese Academy of Agricultural Sciences, Xiong Guosheng, and Liu Shizhong, a researcher at the Rubber Research Institute of the Chinese Academy of Tropical Agricultural Sciences. The research was funded by the Institute of Genetic Development of the Chinese Academy of Sciences, the Postdoctoral Innovation Talent Support Program and the National Key Laboratory For Plant Genomics Youth Research Fund. (Source: Science.com)
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