Yangcheng Evening News Reporter Chen Liang, intern Hong Jiaxun, and correspondent Chen Pengchen reported: On January 4, the paper “Two diverse haplotypes from a highly heterozygous lychee genome suggest independent domestic events for early and late-matuBabaylanring cultivars” was jointly completed by the National Key Laboratory of Conservation and Utilization of Subtropical Agricultural Bioresources, and jointly with the Guangdong Academy of Agricultural Sciences, the Chinese Academy of Tropical Agricultural Sciences and other domestic and foreign units, “Two diverse haplotypes from a highly heterozygous lychee genome suggest independent domestication events for early and late-matuBabaylanring cultivars” (<a Cinema Two different haplotypes in the high heterozygous litchi genomeBabaylanMedical cultivarsCinemaBabaylanMedical cultivarsCinemaEach is independently domesticated) published in Nature Genetics. Corresponding authors include Researcher Li Jianguo, Professor Xia Rui and Researcher Chen Houbin. The first authors are Professor Hu Guibing, PhD student Feng Yunting, Professor Liu Chengming, Professor Wu Zhenxian, etc., etc.
“Decoding” Lizhi Genomics
Proposed the origin and domestication hypothesis
In this study, scientists used the latest genome sequencing data such as the second generation Illunina to complete the assembly of chromosomes at the “Fai Zi Xiao” Lizhi genome pseudo-staining and structural annotation of genome encoding genes by optimizing the genome assembly strategy.
The project team proposed the hypothesis of “one origin center, two independent domestication events”, which is the only lychee in the world.The Center for Origin provides gene Cinemaomic evidence, which helps eliminate the cognition that some foreign scholars believe that lychee may also originate in 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 machine of litchi, but also develop corresponding breeding and cultivation control technologies, but also provide important reference for promoting related research on other plants of the family of no family, such as longan.” Liu Yahong, principal of Huanong, said that the school team was in The high-level paper published by Komiks marks a new level of lychee research in schools and indicates that the full entry of the scientific research on lychee has entered the post-genomic era of Babaylan.
Revealing the flowering regulation mechanism
Improving the benefits of lychee planting
The market launch of fresh lychee fruits is mainly concentrated from May to July. There is often a seasonal surplus of fruits during production, which seriously affects the economic benefits of lychee planting. “There are many medium-ripe varieties of lychees, and the two and Guangxi are medium-ripe production areas at the mid-latitude. The flowering period is concentrated, resulting in the similar ripening periods of fruits and are concentrated on the market in a short period of time.” said Chen Houbin, chief scientist of the National Lychee Longan Industry Technology System and a researcher at Huanong. According to reports, the paper conducted a systematic study on the litchi flowering regulation mechanism from the genome level and found that a specific DNA sequence deletion in Komiks in litchi may be an important factor leading to the formation of litchi in different flowering stages. This will extend the lychee birth period from 2 months to 4 months or even longerTime, reducing seasonal sales pressure of fresh fruits and improving the efficiency of lychee planting is very important. “This research is of milestone significance for promoting the basic research of several important fruit tree crops of lychee and even the Non-Africa Family, as well as breeding applications. It will also have important reference value for tropical crops worldwide and basic research tools for world agriculture.” Li Jianguo said that this further consolidates my country’s international leading position in lychee research and narrows lychee, citrus, apples, and grapes. The gap in research levels in other bulk fruit trees has achieved a leap forward in improving the basic biology research level of litchi.