Chloroplast phylogenomics reveals the maternal ancestry of cultivated chrysanthemums

作者：Yuhui Dong, Qianqian Cao, Kexin Yu, Zhenxing Wang, Sumei Chen, Fadi Chen, Aiping Song · 发表于：Genomics Communications · 年份：2025 · DOI：10.48130/gcomm-0025-0019 · 被引用次数：8 · 研究领域：Plant Diversity and Evolution、Photosynthetic Processes and Mechanisms、Plant and animal studies

Chrysanthemum ( Chrysanthemum × morifolium Ramat. ex Hemsl.), a globally important ornamental plant originating from China, possesses significant economic and cultural value. However, its complex genetic background—shaped by extensive hybridization, polyploidization, and artificial selection—has obscured its parental origins. To elucidate its maternal lineage, we sequenced and assembled the complete chloroplast (cp) genomes of nine accessions de novo from four key Chrysanthemum species: C. dichrum , C. indicum (representing six distinct geographical populations), C. potentilloides , and C. rhombifolium . Comparative analysis revealed highly conserved quadripartite structures across all nine cp genomes, with sizes ranging from 150,999 to 151,252 bp and a GC content of approximately 37.46%. Crucially, phylogenetic analysis, incorporating data from 32 additional published Chrysanthemum cp genomes, revealed that all cultivated chrysanthemum accessions formed a single, monophyletic clade deeply nested within the genetic diversity of wild C. indicum . This finding strongly indicates that C. indicum is the primary maternal progenitor of the cultivated chrysanthemum. Collectively, this research clarifies the genetic diversity and complex evolutionary history of Chrysanthemum , providing a valuable genomic resource for future genetic conservation and breeding programs.