Molecular phylogeny and spatio-temporal diversification of the Millettioid/Phaseoloid clade(Fabaceae:Papilionoideae)  

作　　者：Oyetola Oyebanji Gregory W.Stull Rong Zhang Fabien R.Rahaingoson De-Zhu Li Ting-Shuang Yi 

机构地区：[1]Germplasm Bank of Wild Species&Yunnan Key Laboratory of Crop Wild Relatives Omics,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650201,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Key Laboratory of Plant Diversity and Specialty Crops,Chinese Academy of Sciences,Beijing 100093,China [4]Department of Biology,University of Louisiana,Lafayette 70503,Louisiana,USA [5]Department of Biological Sciences,University of Arkansas,Fayetteville 72701,Arkansas,USA

出　　处：《Journal of Systematics and Evolution》2024年第6期1103-1117,共15页植物分类学报（英文版）

基　　金：supported by grants from the National Natural Science Foundation of China(Key International[regional]Cooperative Research Project)(31720103903);the Strategic Priority Research Program of Chinese Academy of Sciences(XDB31000000);the Science and Technology Basic Resources Investigation Program of China(2019FY100900);the National Natural Science Foundation of China(31270274 and 32270247);China Postdoctoral Science Foundation(2020M683391);Yunnan Postdoctoral Orientation Training Grant(E133021261 and E231740261);Chinese Academy of Sciences-The World Academy of Sciences(CAS-TWAS,2017)President's Fellowship for International PhD students.

摘　　要：The Millettioid/Phaseoloid (or the Millettioid) clade is a major lineage of the subfamily Papilionoideae (Fabaceae) that is poorly understood in terms of its diversification and biogeographic history. To fill this gap, we generated a time-calibrated phylogeny for 749 species representing c. 80% of the genera of this clade using nrDNA ITS, plastid matK, and plastome sequence (including 38 newly sequenced plastomes). Using this phylogenetic framework, we explored the clade's temporal diversification and reconstructed its ancestral areas and dispersal events. Our phylogenetic analyses support the monophyly of the Millettioid/Phaseoloid clade and four of its tribal lineages (Abreae, Desmodieae, Indigofereae, and Psoraleeae), while two tribal lineages sensu lato millettioids and phaseoloids are polyphyletic. The fossil-calibrated dating analysis showed a nearly simultaneous divergence between the stem node (c. 62 Ma) and the crown node (c. 61 Ma) of the Millettioid/Phaseoloid clade in the Paleocene. The biogeographic analysis suggested that the clade originated in Africa and dispersed to Asia, Europe, Australia, and the Americas at different periods in the Cenozoic. We found evidence for shifts in diversification rates across the phylogeny of the Millettioid/Phaseoloid clade throughout the Cenozoic, with a rapid increase in net diversification rates since c. 10 Ma. Possible explanations for the present-day species richness and distribution of the Millettioid/Phaseoloid clade include boreotropical migration, frequent intra- and intercontinental long-distance dispersals throughout the Cenozoic, and elevated speciation rates following the Mid-Miocene Climatic Optimum. Together, these results provide novel insights into major diversification patterns of the Millettioid/Phaseoloid clade, setting the stage for future evolutionary research on this important legume clade.

关 键 词：BIOGEOGRAPHY DIVERSIFICATION FABACEAE long-distance dispersal the Millettioid/Phaseoloid clade 

分 类 号：Q95[生物学—动物学]