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铁观音纯雅礼和
铁观音纯雅礼和


乌龙茶色香韵味
‍‍乌龙茶色香韵味
News Detail

铁观音的秘密

  3
Issuing time:2021-08-31 22:49

近日,由中国农业科学院深圳农业基因组研究所联合国内外多家单位成功破解铁观音基因组和茶树演化史。该研究为茶树功能基因组学研究、现代生物育种奠定了坚实的理论基础,为茶树育种改良提供了新见解。相关研究成果发表在《自然遗传学(Nature Genetics)》上。


茶树是重要的经济作物,起源于中国并在世界范围内产生重要影响。茶树是自交不亲和植物,更因长期的无性繁殖积累大量体细胞突变,导致基因组高度杂合、组装难度很大。


近年来随着测序技术的发展,多个茶树全基因组物理图谱被破译,但仍然缺乏对乌龙茶之首铁观音基因组的研究。



茶树“铁观音”基因组物理图谱


据介绍,该研究团队一是利用独立开发算法成功攻克高杂合、高重复铁观音基因组组装难题,拼接了两套铁观音基因组;二是基于铁观音分型基因组组装鉴定到14691个基因具有等位变异,通过分析显示在无性繁殖的茶树基因组中,显性效应可能是其应对遗传负荷的重要机制;三是通过对161个茶树品种和15个近缘种进行重测序分析等发现,大叶茶与小叶茶存在不同的演化和驯化历史。


该研究得到国家重点研发项目的资助。

Recently, the Shenzhen Institute of Agricultural Genomes, Chinese Academy of Agricultural Sciences, and a number of domestic and foreign units successfully deciphered the Tieguanyin genome and the evolutionary history of tea plants. This research has laid a solid theoretical foundation for tea tree functional genomics research and modern biological breeding, and provided new insights for tea tree breeding and improvement. Related research results were published in "Nature Genetics (Nature Genetics)".


Tea tree is an important economic crop, which originated in China and has an important influence worldwide. Tea plant is a self-incompatible plant, and it has accumulated a large number of somatic mutations due to long-term asexual reproduction, resulting in a highly heterozygous genome and difficult assembly.


In recent years, with the development of sequencing technology, multiple physical maps of the whole genome of tea plants have been deciphered, but there is still a lack of research on the genome of Tieguanyin, the first of oolong tea.



Genomic Physical Map of Tea Tree "Tieguanyin"


According to reports, the research team used an independently developed algorithm to successfully overcome the problem of high heterozygous and high repetitive Tieguanyin genome assembly, and spliced two sets of Tieguanyin genomes; second, based on the Tieguanyin typing genome assembly, it identified 14,691 genes with equivalence. Analysis of positional variation shows that in the genome of asexually propagated tea plants, the dominant effect may be an important mechanism for coping with genetic load; third, through resequencing analysis of 161 tea plant varieties and 15 relative species, it is found that the big leaf Tea and Xiaoye tea have different evolution and domestication history.


The research was funded by a national key research and development project.

Recently, the Shenzhen Institute of Agricultural Genomes, Chinese Academy of Agricultural Sciences, and a number of domestic and foreign units successfully deciphered the Tieguanyin genome and the evolutionary history of tea plants. This research has laid a solid theoretical foundation for tea tree functional genomics research and modern biological breeding, and provided new insights for tea tree breeding and improvement. Related research results were published in "Nature Genetics (Nature Genetics)".


Tea tree is an important economic crop, which originated in China and has an important influence worldwide. Tea plant is a self-incompatible plant, and it has accumulated a large number of somatic mutations due to long-term asexual reproduction, resulting in a highly heterozygous genome and difficult assembly.


In recent years, with the development of sequencing technology, multiple physical maps of the whole genome of tea plants have been deciphered, but there is still a lack of research on the genome of Tieguanyin, the first of oolong tea.



Genomic Physical Map of Tea Tree "Tieguanyin"


According to reports, the research team used an independently developed algorithm to successfully overcome the problem of high heterozygous and high repetitive Tieguanyin genome assembly, and spliced two sets of Tieguanyin genomes; second, based on the Tieguanyin typing genome assembly, it identified 14,691 genes with equivalence. Analysis of positional variation shows that in the genome of asexually propagated tea plants, the dominant effect may be an important mechanism for coping with genetic load; third, through resequencing analysis of 161 tea plant varieties and 15 relative species, it is found that the big leaf Tea and Xiaoye tea have different evolution and domestication history.


The research was funded by a national key research and development project.


Article classification: 铁观音
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