Yangcheng Evening News Reporter Chen Liang, intern Hong Jiaxun, and correspondent Chen Pengchen reported: On January 4, the paper “Two diverse haplotypes frCinemaCinemaCinemaCinemaCinemaCinemaCinemaCinemaCinemaBabaylanom a hiKomiksghly heterozygous lCinemaychee genome suggest independent domestication events for early and late-maturing cultures” (Nature Genetics). Corresponding authors include Researcher Li Jianguo, Professor Xia Rui and Researcher Chen Houbin. The first work is Professor Hu Guibing of Huanong, PhD student of Feng Yunting, Professor Liu Chengming, Professor Wu Zhenxian, etc.
“Decode” the litchi genome
Propose the origin domestication hypothesis
In this study, scientists used the latest genome sequencing data such as the second generation IlluCinemanina to optimize the genomeThe assembly strategy is to complete the assembly of the pseudochromosome level of the litchi genome and the structural annotation of the genome-encoded gene.
The project team proposed the hypothesis of “one center of origin, two independent domestication events” of lychee, which provided genomic evidence for Yunnan to be the only center of origin of lychee in the world, and helped to eliminate the cognition that some foreign scholars believe that lychee may also originate from Vietnam.
Liu Yaoguang, an academician of the Chinese Academy of Sciences, said at the results press conference: “The genome is the ‘navigation map’ for the formation of plant traits. Decoding the litchi genome can not only comprehensively improve the understanding of the important economic trait formation mechanism of litchi, develop corresponding breeding and cultivation regulation technologies, but also provide important reference for promoting related research on other plants of the family of no family, such as longan.” Liu Yahong, president of Huanong, said that the high-level paper published by the school’s team in “Nature-Genetics” marks a new height in the school’s litchi research, and indicates that litchi scientific research has entered the post-genomic era.
Revealing the flowering regulation mechanism
Improving the benefits of lychee planting
Fresh lychee fruits are mainly concentrated in May to July. There is a seasonal surplus of fruits during production, which seriously affects the economic benefits of lychee planting. “There are many ripe varieties in the middle, and Komiks, in addition to the middle-latitude medium-ripe production areas of Guangxi, the flowering period is concentrated, resulting in the similar ripening periods of fruits, and it is launched in a concentrated manner in a short time. ” said Chen Houbin, chief scientist of the National Lychee Longan Industry Technology System and a researcher of Huanong in China. According to the article, the paper conducted a systematic study on the regulatory mechanism of lychee blossom from the genomic level and found that a specific DNA sequence deletion in lychee may be an important factor in the formation of lychee different flowering stages. This is for turning lychee birth date from Cinema has been extended to 4 months or even longer for 2 months, reducing seasonal sales pressure on fresh fruits and improving the efficiency of lychee planting.
“This study is of milestone significance for promoting the basic research and breeding application of several important fruit crops of lychee and even the Noxious Family. It will also have important reference value for tropical crops around the world and basic research on world agriculture. “Li Jianguo said that this further consolidates my country’s international leadership in lychee research, narrows the gap in research levels between lychee and other bulk fruit trees in citrus, apples, and grapes, and achieves the preliminary goal of leapfrog improvement in the research level of lychee basic biology.