Multi-disciplinary evidence illuminates the speciation history of a monophyletic yet dimorphic lily group  

作　　者：Yu Feng Chaochao Yan Wen-Qin Tu Yu-Mei Yuan Jing-Bo Wang Xiao-Juan Chen Chang-Qiu Liu Yundong Gao 

机构地区：[1]Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610213,China [2]Key Laboratory of Biodiversity Science and Ecological Engineering of the Ministry of Education,College of Life Sciences,Beijing Normal University,Beijing 100875,China [3]College of Life Sciences,University of Chinese Academy of Sciences,Beijing 101408,China [4]Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain,Guangxi Institute of Botany,Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences,Guilin 541006,China

出　　处：《Plant Diversity》2025年第2期189-200,共12页植物多样性(英文版)

基　　金：supported by the National Natural Science Foundation of China(NSFC Grant Nos.32171605,31770406);Natural Science Foundation of Sichuan Province(Grant No.2023NSFSC0141)to Y.D.Gao.

摘　　要：Species boundaries are dynamic and constantly challenged by gene flow.Understanding the strategies different lineages adopt to maintain ecological and genetic distinctiveness requires employing an integrative species concept that incorporates data from a variety of sources.In this study,we incorporated genetic,ecological,and environmental evidence to assess the extent of speciation or evolutionary divergence within a monophyletic yet dimorphic group(i.e.,clade Leucolirion consisting of six species)within the genus Lilium.This clade consists of two lineages that exhibit unexpectedly distinct perianth appearances:whitish trumpet(funnel form,encompassing four species)and orange recurved(reflex form,including two species),respectively,which are separated by completely different pollination syndromes.Transcriptome-based nuclear and plastome datasets indicate that these two lineages are isolated,with only weak ancient gene flow between them.Within each lineage,several taxa with incomplete isolation have diverged,as indicated by weak genetic structure,strong gene flow,and conflicts between nuclear and chloroplast phylogenies,especially in the trumpet lineage.Although these taxa are not entirely independent,our evidence indicates that they are diverging,with recent gene flow disappearing and multiple isolation strategies emerging,such as differences in flowering time and niche specialization.Taken together,our findings suggest that species divergence and maintenance in Lilium are driven by a combination of adaptive and non-adaptive processes,highlighting the complex interplay of historical climate changes,ecological adaptation,and gene flow in shaping biodiversity within this genus.

关 键 词：SPECIATION Species boundary Interspecific gene flow Integrated species notion LILIUM Isolation 

分 类 号：Q94[生物学—植物学]