Analyses of a chromosome-scale genome assembly reveal the origin and evolution of cultivated chrysanthemum
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Published:2023-04-11
Issue:1
Volume:14
Page:
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ISSN:2041-1723
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Container-title:Nature Communications
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language:en
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Short-container-title:Nat Commun
Author:
Song Aiping, Su Jiangshuo, Wang Haibin, Zhang ZhongrenORCID, Zhang XingtanORCID, Van de Peer Yves, Chen Fei, Fang Weimin, Guan Zhiyong, Zhang Fei, Wang ZhenxingORCID, Wang Likai, Ding Baoqing, Zhao Shuang, Ding Lian, Liu Ye, Zhou Lijie, He Jun, Jia Diwen, Zhang Jiali, Chen Chuwen, Yu Zhongyu, Sun Daojin, Jiang JiafuORCID, Chen Sumei, Chen FadiORCID
Abstract
AbstractChrysanthemum (Chrysanthemum morifolium Ramat.) is a globally important ornamental plant with great economic, cultural, and symbolic value. However, research on chrysanthemum is challenging due to its complex genetic background. Here, we report a near-complete assembly and annotation for C. morifolium comprising 27 pseudochromosomes (8.15 Gb; scaffold N50 of 303.69 Mb). Comparative and evolutionary analyses reveal a whole-genome triplication (WGT) event shared by Chrysanthemum species approximately 6 million years ago (Mya) and the possible lineage-specific polyploidization of C. morifolium approximately 3 Mya. Multilevel evidence suggests that C. morifolium is likely a segmental allopolyploid. Furthermore, a combination of genomics and transcriptomics approaches demonstrate the C. morifolium genome can be used to identify genes underlying key ornamental traits. Phylogenetic analysis of CmCCD4a traces the flower colour breeding history of cultivated chrysanthemum. Genomic resources generated from this study could help to accelerate chrysanthemum genetic improvement.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
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