文献类型： 外文期刊
作者： Yang, Feng-Xi 1 ; Gao, Jie 1 ; Wei, Yong-Lu 1 ; Ren, Rui 1 ; Zhang, Guo-Qiang 2 ; Lu, Chu-Qiao 1 ; Jin, Jian-Peng 1 ; Ai, 1 ;
作者机构： 1.Guangdong Acad Agr Sci, Inst Environm Hort, Guangdong Key Lab Ornamental Plant Germplasm Inno, Guangzhou, Peoples R China
2.Natl Orchid Conservat Ctr China, Orchid Conservat & Res Ctr Shenzhen, Lab Orchid Conservat & Utilizat, Shenzhen, Peoples R China
3.Fujian Agr & Forestry Univ, Coll Landscape Architecture, Key Lab Natl Forestry, Fuzhou, Peoples R China
4.Fujian Agr & Forestry Univ, Coll Landscape Architecture, Grassland Adm Orchid Conservat & Utilizat, Fuzhou, Peoples R China
5.South China Normal Univ, Guangdong Prov Key Lab Biotechnol Plant Dev, Sch Life Sci, Guangzhou, Peoples R China
6.Natl Cheng Kung Univ, Orchid Res & Dev Ctr, Tainan, Taiwan
7.Natl Cheng Kung Univ, Inst Trop Plant Sci & Microbiol, Tainan, Taiwan
关键词： Cymbidium sinense; genome; flower patterning; anthocyanin; fragrance
期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）
ISSN： 1467-7644
年卷期： 2021 年 19 卷 12 期
页码：
收录情况： SCI
摘要： The Orchidaceae is of economic and ecological importance and constitutes similar to 10% of all seed plant species. Here, we report a genome physical map for Cymbidium sinense, a well-known species belonging to genus Cymbidium that has thousands of natural variation varieties of flower organs, flower and leaf colours and also referred as the King of Fragrance, which make it arose into a unique cultural symbol in China. The high-quality chromosome-scale genome assembly was 3.52 Gb in size, 29 638 protein-coding genes were predicted, and evidence for whole-genome duplication shared with other orchids was provided. Marked amplification of cytochrome- and photosystem-related genes was observed, which was consistent with the shade tolerance and dark green leaves of C. sinense. Extensive duplication of MADS-box genes, and the resulting subfunctional and expressional differentiation, was associated with regulation of species-specific flower traits, including wild-type and mutant-type floral patterning, seasonal flowering and ecological adaption. CsSEP4 was originally found to positively regulate gynostemium development. The CsSVP genes and their interaction proteins CsAP1 and CsSOC1 were significantly expanded and involved in the regulation of low-temperature-dependent flowering. Important genetic clues to the colourful leaf traits, purple-black flowers and volatile trait in C. sinense were also found. The results provide new insights into the molecular mechanisms of important phenotypic traits of Cymbidium and its evolution and serve as a powerful platform for future evolutionary studies and molecular breeding of orchids.
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