Target enrichment data reveal rapid divergence with reticulate evolution of Maianthemum(Asparagaceae:Convallarioideae)in the Himalayan-Hengduan Mountains and eastern Asia  

作　　者：Yan-Yang Xie Ze-Long Nie Meng-Hua Zhang Ming-Yang Song Jun Wen Ying Meng 

机构地区：[1]Hunan Provincial Key Laboratory of Ecological Conservation and Sustainable Utilization of Wulingshan Resources,College of Biology and Environmental Sciences,Jishou University,Jishou 416000,China [2]Department of Botany,National Museum of Natural History,Smithsonian Institution,Washington,DC,20013-7012,USA

出　　处：《Journal of Systematics and Evolution》2025年第1期85-98,共14页植物分类学报(英文版)

基　　金：supported by grants from Natural Sciences Foundation of China(32160052,31760055);Natural Sciences Foundation of Hunan Province(2019JJ40232 and 2019JJ40233).

摘　　要：Understanding plant diversity and the phylogenetic divergences in the Northern Hemisphere is essential for in-depth evolutionary studies and conservation efforts.Maianthemum is an ideal example to explore plant diversification processes in the Northern Hemisphere,with more than 35 species widely distributed in forests in North to Central America,Europe and eastern Asia.Yet the phylogenetic relationships within Maianthemum remain elusive.In this study,we reconstructed a well-supported phylogenetic framework of Maianthemum and explored possible gene introgressions and reticulate evolution using nuclear and chloroplast genomes based on the target enrichment Hyb-Seq approach.Both nuclear and chloroplast phylogenetic results supported three clusters corresponding to their biogeographic distribution of the New World,the Himalayan-Hengduan Mountains,and the north temperate zone,respectively.The genus was inferred to be most likely originated in North America with migrations into Central America and eastern Asia in the late Miocene.Our results suggested that both incomplete lineage sorting and hybridizations/introgressions along with geographic isolation have contributed to the rapid divergence of Maianthemum in eastern Asia,which may represent a complex model for the evolutionary radiation of plants in eastern Asia and even the Northern Hemisphere.

关 键 词：ASPARAGACEAE Himalayan-Hengduan Mountain Maianthemum PHYLOGENOMICS reticulate evolution 

分 类 号：Q94[生物学—植物学]