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In China's production of nearly 100 million tons, accounting for more than 80% of the world's sweet potatoes, because of the complex genetic background, the origin of the problem is still unresolved, the development is restricted.
recently, Chinese and German scientists mapped the sweet potato genome, revealing the origin history of this important crop and pioneering the analysis of complex genomes of polysomnomes.
the results were published august 21 in the internationally renowned academic journal Nature-Plants.
the results were obtained by the Shanghai Chenshan Botanical Garden and the Shanghai Institute of Plant Physiology and Ecology of the Chinese Academy of Sciences in cooperation with the research team of the Max Planck Institute of Molecular Genetics and the Institute of Molecular Plant Physiology in Germany.
Jun Yang of Chenshan Botanical Garden in Shanghai is the first author of this paper.
the research was funded by the Humboldt Foundation, the Ministry of Science and Technology, the National Natural Science Foundation of Germany, the Chinese Academy of Sciences, the China Postdoctoral Foundation, the Shanghai Municipal Greening and Municipal Administration and the Shanghai Science and Technology Commission.
china produces more than 80% of the world's sweet potatoes, producing nearly 100 million tons, based on 50% of the world's total planting area.
complex genetic background has always been a bottleneck in sweet potato research.
of sweet potato genomes drawn by Chinese and German scientists not only reveals the origin history of their species, but also makes a major breakthrough in the field of polysomnome genomics.
the achievement is also a landmark breakthrough in the field of scientific research in the seven years since the opening of the Chenshan Botanical Garden in Shanghai.
according to Dr. Jun Yang, there are about 440 million base pairs in the sweet potato genome, with a single group size between 700M and 800M.
although high-passer sequencing technology has changed rapidly in recent years, the analysis of polysomnome genomes still faces great obstacles.
The study not only located the vast majority of genome sequences on the corresponding chromosomes, but also separated the six sets of chromosomes of the hexathrophysics through a new bioinscerology method, revealing that of the 90 chromosomes of sweet potatoes, 30 chromosomes were derived from their double ancestors, and another 60 chromosomes were derived from their four-fold ancestors;
discovery solves the mystery of the origin of sweet potato and provides a new way of thinking for the rational use of sweet potato near-source wild species.
the International Sweet Potato Genome Project began in 2014.
German scientists in China and Germany took full advantage of multilateral cooperation, which took only 18 months to overcome the worldwide problem of multi-body genome assembly.
the study used Illumina sequencing technology, developed a new set of multi-fold monoloyal analysis software, successfully mapped the sweet potato genome.
this provides a perfect and reliable strategy and technology for other complex polysomnome genome sequencing, and will greatly promote the process of functional genomics research of resource plants.
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