Global dispersal and diversification of the genus Schoenus (Cyperaceae) from the Western Australian biodiversity hotspot  

作　　者：Tammy L.Elliott Ruan van Mazijk Russell L.Barrett Jeremy J.Bruhl Simon Joly Ngalirendwe Muthaphuli Karen L.Wilson A.Muthama Muasya 

机构地区：[1]Department of Botany and Zoology,Faculty of Science,Masaryk University,Kotlarska [2]Brno 61137,Czech Republic 2 Bolus Herbarium,Department of Biological Sciences,University of Cape Town,Private Bag X3,Rondebosch,Cape Town 7701,South Africa [3]National Herbarium of New South Wales,Royal Botanic Gardens and Domain Trust,Mrs Macquaries Road,Sydney,NSW 2000,Australia [4]Botany and N.C.W.Beadle Herbarium,University of New England,Armidale,NSW 2351,Australia [5]Institut de Recherche en Biologie Végétale,Département de Sciences Biologiques,Universitéde Montréal,4101,Sherbrooke East,Montreal,QC H1X 2B2,Canada [6]Montreal Botanical Garden,4101,Sherbrooke East,Montreal,QC H1X 2B2,Canada [7]Royal Botanic Gardens,Kew,Richmond,Surrey TW93AE,United Kingdom

出　　处：《Journal of Systematics and Evolution》2021年第4期791-808,共18页植物分类学报（英文版）

基　　金：by funds granted to TLE from the Fonds de recherche du Québec-Nature et technologies(FQRNT);the University of Cape Town(Smuts Memorial Botanical Fellowship);the International Association for Plant Taxonomy,as well as to AMM from the University of Cape Town and the Foundational Biodiversity Information Programme(FBIP);the South African National Research Foundation(NFR:grant 104879).

摘　　要：The predominantly austral genus Schoenus L.is the largest genus in tribe Schoeneae and one of the ten most species-rich Cyperaceae genera,with over 150 accepted species found mostly in Australia,New Zealand,southeast Asia,and southern Africa.Here,we use data based on two nuclear and three plastid DNA regions to present one of the most comprehensive phylogenetic reconstructions of a genus in Cyperaceae to date,covering over 70%of described species of Schoenus.After recent taxonomic realignments in the last 4 years have both added and removed species from the genus,we show that Schoenus is now monophyletic.In addition,our results indicate that Schoenus originated in Western Australia in the Paleocene and eventually dispersed to surrounding continents,but rarely back.The diversification rate of the genus appears to have slightly decreased over time,and there has not been an increase associated with the establishment of the Cape clade endemic to the sclerophyllous fynbos vegetation type,such as has been reported in other plant lineages endemic to the Cape region.These results will serve as a template to understanding the complex patterns of genome size evolution and to untangle drivers of diversification in this genus.

关 键 词：ancestral area reconstruction austral BIOGEOGRAPHY Cape clade dispersal DIVERSIFICATION FYNBOS kwongan PHYLOGENETICS sclerophyllous 

分 类 号：Q94[生物学—植物学]