A chromosome-level genome assembly provides insights into Cornus wilsoniana evolution, oil biosynthesis, and floral bud development
文献类型： 外文期刊
作者： He, Zhenxiang 1 ; Chao, Haoyu 1 ; Zhou, Xinkai 1 ; Ni, Qingyang 2 ; Hu, Yueming 2 ; Yu, Ranran 1 ; Wang, Minghuai 3 ; Li, Changzhu 4 ; Chen, Jingzhen 4 ; Chen, Yunzhu 4 ; Chen, Yong 5 ; Cui, Chunyi 6 ; Zhang, Liangbo 4 ; Chen, Ming 2 ; Chen, Dijun 1 ;
作者机构： 1.Nanjing Univ, Sch Life Sci, State Key Lab Pharmaceut Biotechnol, Nanjing 210023, Peoples R China
2.Zhejiang Univ, Coll Life Sci, Dept Bioinformat, Hangzhou 310058, Peoples R China
3.Guangdong Acad Forestry, Forest Protect Dept, Guangzhou 510520, Peoples R China
4.Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410004, Peoples R China
5.Xishan Forest Farm, Chongqing 402360, Peoples R China
6.Longshan Forest Farm, Lechang 512221, Peoples R China
7.Hunan Acad Agr Sci, Hunan Hort Res Inst, Changsha 410125, Hunan, Peoples R China
期刊名称：HORTICULTURE RESEARCH （ 影响因子：8.7； 五年影响因子：9.0 ）
ISSN： 2662-6810
年卷期： 2023 年 10 卷 11 期
页码：
收录情况： SCI
摘要： Cornus wilsoniana W. is a woody oil plant with high oil content and strong hypolipidemic effects, making it a valuable species for medicinal, landscaping, and ecological purposes in China. To advance genetic research on this species, we employed PacBio together with Hi-C data to create a draft genome assembly for C. wilsoniana. Based on an 11-chromosome anchored chromosome-level assembly, the estimated genome size was determined to be 843.51 Mb. The N50 contig size and N50 scaffold size were calculated to be 4.49 and 78.00 Mb, respectively. Furthermore, 30474 protein-coding genes were annotated. Comparative genomics analysis revealed that C. wilsoniana diverged from its closest species similar to 12.46 million years ago (Mya). Furthermore, the divergence between Cornaceae and Nyssaceae occurred >62.22 Mya. We also found evidence of whole-genome duplication events and whole-genome triplication gamma, occurring at similar to 44.90 and 115.86 Mya. We further inferred the origins of chromosomes, which sheds light on the complex evolutionary history of the karyotype of C. wilsoniana. Through transcriptional and metabolic analysis, we identified two FAD2 homologous genes that may play a crucial role in controlling the oleic to linoleic acid ratio. We further investigated the correlation between metabolites and genes and identified 33 MADS-TF homologous genes that may affect flower morphology in C. wilsoniana. Overall, this study lays the groundwork for future research aimed at identifying the genetic basis of crucial traits in C. wilsoniana.
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