Molecular phylogenetic analysis resolves Trisetum (Poaceae: Pooideae: Koeleriinae) polyphyletic: Evidence for a new genus, Sibirotrisetum and resurrection of Acrospelion  

作　　者：Patricia Barbera Robert J.Soreng Paul M.Peterson Konstantin Romaschenko Alejandro Quintanar Carlos Aedo 

机构地区：[1]Department of Biodiversity and Conservation,Real Jardin Botanico,CSIC,Madrid 28014,Spain [2]Department of Botany,National Museum of Natural History,Smithsonian Institution,Washington DC 20013-7012,USA [3]Department of Africa and Madagascar,Missouri Botanical Carden,St.Louis,MO 63110,USA

出　　处：《Journal of Systematics and Evolution》2020年第4期517-526,共10页植物分类学报（英文版）

基　　金：This work was financed by the Smithsonian Institution,Flora iberica CGL2014-52787-C3-1-P,CGL2012-32914;CGL2017-85204-C3-1-P projects of the Spanish Government;through the FPI fellowship BES-2012-053754 to P.Barbera.

摘　　要：To investigate the evolutionary relationships among the species of Trisetum and other members of subtribe Koeleriinae,a phylogeny based on DNA sequences from four gene regions(ITS,rpl32-trnL spacer,rpsi6-trnK spacer,and rpsi6 intron)is presented.The analyses,including type species of all genera in Koeleriinae(Acrospelion,Avellinia,Cinnagrostis,Gaudinia,Koeleria,Leptophyllochloa,Limnodea,Peyritschia,Rostraria,Sphenopholis,Trisetaria,Trisetopsis,Trisetum),along with three outgroups,confirm previous indications of extensive polyphyly of Trisetum.We focus on the monophyletic TWsetum sect.SfbfWca dade that we interpret here as a distinct genus,Sibirotrisetum gen.nov.We include a description of Sibirotrisetum with the following seven new combinations:Sibirotrisetum aeneum,S.bifidum,S.henryi,S.scitulum,S.sibiricum,S.sibiricum subsp.litorale,and S.turcicum;and a single new combination in Acrospelion:A.distichophyllum.Trisetum s.s.is limited to one,two or three species,pending further study.

关 键 词：Acrospelion Aveneae grasses molecular systematics POEAE Sibirotrisetum TAXONOMY Trisetum 

分 类 号：Q95[生物学—动物学]