Biogeographic patterns of polyploid species for the angiosperm flora in China  

作　　者：Kai-Lai Wang Pu-Rong Deng Zhi Yao Jin-Yi Dong Zhi He Peng Yang Yong-Bo Liu 

机构地区：[1]State Key Laboratory of Environmental Criteria and Risk Assessment,State Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment,Chinese Research Academy of Environmental Sciences,8 Dayangfang,Beijing 100012,China

出　　处：《Journal of Systematics and Evolution》2023年第5期776-789,共14页植物分类学报（英文版）

基　　金：supported by the Biodiversity Survey,Observation and Assessment of the Ministry of Ecology and Environment,China(2019HJ2096001006);the General Research Project of CRAES,China(No.2016YSKY-08).

摘　　要：Exploring the frequency and distribution pattern of polyploid species in geographic parameters is of significance in understanding the mechanisms of polyploid speciation and evolutionary drivers of biodiversity.We here explored polyploid and paleopolyploid incidence frequency in a scale of 100×100 km grids in China.We found 33%of angiosperm species are polyploidy in China,and 23%of polyploid speciation.Western China and eastern China showed a significantly different polyploid and paleopolyploid frequency,with an evolutionary cradle of polyploid angiosperms in the Qinghai-Tibetan plateau.Herbaceous species exhibited higher polyploid frequency but lower paleopolyploid frequency than woody species,indicating the former experienced more rapid differentiation and speciation than the latter.Our results indicate that western China is an evolutionary cradle for polyploid angiosperms where harsh environment facilitates the establishment and survival of polyploids,while polyploid lineages tend to rediploidize to be diploids with sufficient time in suitable environment.

关 键 词：angiosperm flora biogeographic patterns plant speciation polyploid frequency polyploid survival index rediploidization 

分 类 号：Q94[生物学—植物学]