Evolutionary history of two evergreen Rhododendron species as revealed by chromosome-level genome assembly

doi:10.3389/fpls.2023.1123707

KIB OpenIR

	Evolutionary history of two evergreen Rhododendron species as revealed by chromosome-level genome assembly
	Wu,Xiaopei; Zhang,Lu; Wang,Xiuyun; Zhang,Rengang; Jin,Guihua; Hu,Yanting; Yang,Hong; Wu,Zhenzhen; Ma,Yongpeng; Zhang,Chengjun; Wang,Jihua
	2023
发表期刊	FRONTIERS IN PLANT SCIENCE
卷号	14 页码:1123707
摘要	BackgroundThe genus Rhododendron (Ericaceae), a species-rich and widely distributed genus of woody plants, is distinguished for the beautiful and diverse flowers. Rhododendron delavayi Franch. and Rhododendron irroratum Franch., are highly attractive species widely distributed in south-west China and abundant new varieties have been selected from their genetic resources. MethodsWe constructed chromosome-scale genome assemblies for Rhododendron delavayi and Rhododendron irroratum. Phylogenetic and whole-genome duplication analyses were performed to elucidate the evolutionary history of Rhododendron. Further, different types of gene duplications were identified and their contributions to gene family expansion were investigated. Finally, comprehensive characterization and evolutionary analysis of R2R3-MYB and NBS-encoding genes were conducted to explore their evolutionary patterns. ResultsThe phylogenetic analysis classified Rhododendron species into two sister clades, 'rhododendrons' and 'azaleas'. Whole-genome duplication (WGD) analysis unveiled only one WGD event that occurred in Rhododendron after the ancestral gamma triplication. Gene duplication and gene family expansion analyses suggested that the younger tandem and proximal duplications contributed greatly to the expansion of gene families involved in secondary metabolite biosynthesis and stress response. The candidate R2R3-MYB genes likely regulating anthocyanin biosynthesis and stress tolerance in Rhododendron will facilitate the breeding for ornamental use. NBS-encoding genes had undergone significant expansion and experienced species-specific gain and loss events in Rhododendron plants. ConclusionsThe reference genomes presented here will provide important genetic resources for molecular breeding and genetic improvement of plants in this economically important Rhododendron genus.
关键词	Rhododendron delavayi Rhododendron irroratum genome evolution gene duplication anthocyanin biosynthesis NBS-encoding genes MULTIPLE SEQUENCE ALIGNMENT RICH REPEAT GENES PHYLOGENETIC ANALYSIS ARABIDOPSIS-THALIANA WHOLE-GENOME TOOL PIGMENTATION DUPLICATION RESISTANCE ACCURATE
学科领域	Plant Sciences
DOI	10.3389/fpls.2023.1123707
WOS记录号	WOS:000962755100001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/74974
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Wu,Xiaopei,Zhang,Lu,Wang,Xiuyun,et al. Evolutionary history of two evergreen Rhododendron species as revealed by chromosome-level genome assembly[J]. FRONTIERS IN PLANT SCIENCE,2023,14:1123707.
APA	Wu,Xiaopei.,Zhang,Lu.,Wang,Xiuyun.,Zhang,Rengang.,Jin,Guihua.,...&Wang,Jihua.(2023).Evolutionary history of two evergreen Rhododendron species as revealed by chromosome-level genome assembly.FRONTIERS IN PLANT SCIENCE,14,1123707.
MLA	Wu,Xiaopei,et al."Evolutionary history of two evergreen Rhododendron species as revealed by chromosome-level genome assembly".FRONTIERS IN PLANT SCIENCE 14(2023):1123707.

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