Phylogenomics enables biogeographic analysis and a new subtribal classification of Andropogoneae(Poaceae-Panicoideae)  

作　　者：Cassiano A.D.Welker Michael R.McKain Matt C.Estep Rémy S.Pasquet Gilson Chipabika Beatrice Pallangyo Elizabeth A.Kellogg 

机构地区：[1]Instituto de Biologia,Universidade Federal de Uberlândia,Rua Cearás/n,Uberlândia,MG 38400-902,Brazil [2]Department of Biological Sciences,The University of Alabama,411 Mary Harmon Bryant Hall,Tuscaloosa,AL 35487,USA [3]Department of Biology,Appalachian State University,Boone,NC 28608,USA [4]DIADE Research Unit,Universitéde Montpellier,IRD,Montpellier F-34394,France [5]Mount Maluku Central Research Station,Zambia Agriculture Research Institute,Chilanga Private Bag 7,Zambia [6]Biocontrol Program,Kibaha PO Box 30031,Tanzania [7]Donald Danforth Plant Science Center,975 North Warson Road,St.Louis,MO 63121,USA

出　　处：《Journal of Systematics and Evolution》2020年第6期1003-1030,共28页植物分类学报（英文版）

基　　金：the National Science Foundation(NSF,USA)Grants DEB-11456884 and DEB-1457748 to Elizabeth A.Kellogg;The authors would like to thank Jefferson Prado and Kanchi N.Gandhi for discussions on nomenclature,Riccardo Baldini for providing herbarium samples for DNA extraction,Simon Malcomber for the collection of multiple specimens critical for the analysis,and Jordan Brock,Andrew Doust,Carol I i ne Z.Fieker,John Hodge,and Hilda M.Longhi-Wagner for providing photos of Andropogoneae.Cassiano A.D.Welker would like to thank Conselho Nacional de Desenvolvimento Cientifico e Tecnologico(CNPq,Brazil)for grants and fellowships(426334/2018-3 and 150896/2019-0);the Smithsonian Institution,Missouri Botanical Garden,and Harvard University for travel grants to visit and curate their herbarium collections(Cuatrecasas Award,Shirley A.Graham Fellowship in Systematic Botany and Biogeography,and Harvard University Herbaria Travel Grant,respectively).

摘　　要：The grass tribe Andropogoneae(Poaceae-Panicoideae)includes several important crops such as maize,sugarcane,and sorghum,and dominates the tropical grasslands of the world.We present here a plastome phylogeny of the tribe with the largest sample of genera to date(about 73%),including 65 newly assembled plastomes,together with a broad biogeographic analysis of Andropogoneae.Major relationships found in previous phylogenetic studies were confirmed here,with most nodes having higher resolution and support,including those of the backbone of the tree,which had been a major problem in previous phylogenies of the tribe.Our dated tree suggests that Andropogoneae diverged from Arundinelleae in the Early Miocene,while the“core Andropogoneae”clade originated in the Late Miocene.The tribe originated in East Asia,but intercontinental dispersal has been common,with many independent dispersal events to Africa and the New World.Based on the plastome phylogeny,we propose here a new classification of Andropogoneae as most of its previously accepted subtribes are not monophyletic.Our classification comprises 14 subtribes,92 genera,and∼1224 species.About 90%of the Andropogoneae species could be assigned to a subtribe,which represents a major step toward clarification of the taxonomy of the tribe.The remaining taxa were placed incertae sedis pending additional molecular data.The new subtribes Chrysopogoninae and Rhytachninae are described herein.Our plastome trees also indicate that several Andropogoneae genera are para-or polyphyletic and require additional studies to define their circumscriptions.

关 键 词：dated phylogeny East Asia GRAMINEAE intercontinental dispersal MIOCENE subtribe whole chloroplast genome 

分 类 号：Q94[生物学—植物学]