For the first time, a pan-genome map of cultivated rice-wild rice was mapped.

On January 16th, Han Bin Research Group of the Center for Excellence in Molecular Plant Sciences of the Chinese Academy of Sciences, Huang Xuehui Research Group of Shanghai Normal University, and Wei Xinghua Research Group of the China Rice Research Institute collaborated on the study of Pan-genomes stings the subject of the cross-genomes of the cross-the-point of the law, the study, published online in Nature-Genetics.
the first study of cultivated rice-wild rice pan-genome map, the system identified a collection of coding genes covering various groups of rice, many of the newly identified genes in various groups of rice show a rich "presence-missing" variation, the results of the study published in the form of long text.
rice is an important food crop in our country.
Asian cultivated rice and its ancestors of common wild rice species there are many kinds of groups, widely distributed, can adapt to a variety of ecological environment and agronomic conditions.
rice rich genetic diversity plays an important role in domestication and modern breeding, and will become a key resource for variety improvement to cope with the growth of food demand and environmental changes.
in previous studies, the identification of genetic variation of genomes mostly relied on sequence similarity to match short sequences directly to the rice reference genome, resulting in the loss of information in the highly polymorphic regions of the genome. At the same time,
, due to the rich genetic diversity of rice, the reference genome "Indica Japan Clear" can not cover all the functional genes in cultivated rice and ordinary wild rice;
, the research team selected 66 cultivated rice varieties and wild rice strains from different rice groups, carried out deep sequencing, head sequence assembly and gene annotation analysis, obtained the fine genome map of various groups of rice materials, identified various complex genetic variations in the rice genome, and found that many functional genes existed in a variety of allelin types. In addition,
the study system identified the almost saturated coding gene set in cultivated rice and ordinary wild rice and its "presence-missing" variation in different varieties;
the research results will help to accurately explore the key variable sites of complex agronomic traits and promote the study of functional genomics of rice, in addition, this research will help breeders to make full use of the rich genetic variation in various groups of rice, and provide important basic information for further enhancing the yield potential and anti-reversal characteristics of rice in China.
research work has been supported by the National Natural Science Foundation of China major research program, the Ministry of Science and Technology's national key research and development program and the Chinese Academy of Sciences strategic leading science and technology special projects.
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