Genomic and phenotypic signatures provide insights into the wide adaptation of a global plant invader  

作　　者：Yan Hao Xin-Feng Wang Yaolin Guo Tian-Yang Li Ji Yang Malika LAinouche Armel Salmon Rui-Ting Ju Ji-Hua Wu Lin-Feng Li Bo Li 

机构地区：[1]National Observations and Research Station for Wetland Ecosystems of the Yangtze Estuary and Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering,Institute of Biodiversity Science and Institute of Eco-Chongming,School of Life Sciences,Fudan University,Shanghai 200438,China [2]State Key Laboratory of Biocontrol,Guangdong Provincial Key Laboratory of Plant Resources,School of Life Sciences,Sun Yat-sen University,Guangzhou 510275,China [3]UMR CNRS 6553,Universite´of Rennes,Campus de Beaulieu,35042 Rennes Cedex Paris,France [4]State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems,College of Ecology,Lanzhou University,Lanzhou 730000,China [5]Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China,Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Centre for Invasion Biology,Institute of Biodiversity,School of Ecology and Environmental Science,Yunnan University,Kunming,Yunnan 650504,China

出　　处：《Plant Communications》2024年第4期275-290,共16页植物通讯（英文）

基　　金：supported by the National Key Research and Development Program of China (2022YFC2601100 to B.L.);the Natural Science Foundation of China (32030067 to J.-H.W.,31970235 to L.-F.L.,32171661 to R.-T.J.,and 31961133028 to B.L.).

摘　　要：Invasive alien species are primary drivers of biodiversity loss and species extinction.Smooth cordgrass(Spartina alterniflora)is one of the most aggressive invasive plants in coastal ecosystems around the world.However,the genomic bases and evolutionary mechanisms underlying its invasion success have remained largely unknown.Here,we assembled a chromosome-level reference genome and performed phenotypic and population genomic analyses between native US and introduced Chinese populations.Our phenotypic comparisons showed that introduced Chinese populations have evolved competitive traits,such as earlyflowering time and greater plant biomass,during secondary introductions along China’s coast.Population genomic and transcriptomic inferences revealed distinct evolutionary trajectories of low-and high-latitude Chinese populations.In particular,genetic mixture among different source populations,together with in-dependent natural selection acting on distinct target genes,may have resulted in high genome dynamics of the introduced Chinese populations.Our study provides novel phenotypic and genomic evidence showing how smooth cordgrass rapidly adapts to variable environmental conditions in its introduced ranges.Moreover,candidate genes related toflowering time,fast growth,and stress tolerance(i.e.,salinity and submergence)provide valuable genetic resources for future improvement of cereal crops.

关 键 词：ADAPTATION natural selection invasive species population genomics Spartina alterniflora 

分 类 号：Q94[生物学—植物学]