Phylogenetic relationships within the Mexican genus Bakerantha(Hechtioideae;Bromeliaceae)based on plastid and nuclear DNA:Implications for taxonomy  

作　　者：Katya J.Romero-Soler Ivon M.Ramiirez-Morillo Eduardo Ruiz-Sanchez Claudia T.Homung-Leoni German Carnevali Nestor Raigoza 

机构地区：[1]Unidad de Recursos Naturales,Centro de Investigacion Cientifica de Yucatan,A.C.,Merida 97205,Mexico [2]Departamento de Botanica y Zoologfa,Centro Universitario de Ciencias Biologicas y Agropecuarias,Universidad de Guadalajara,Guadalajara 44160,Mexico [3]Area Academica de Biologia,Centro de Investigaciones Biologicas,Instituto de Ciencias Basicas e Ingenieria,Universidad Autonoma del Estado de Hidalgo,Pachuca 42039,Mexico [4]Oakes Ames Orchid Herbarium,Harvard University Herbaria,Cambridge,MA 02138,USA

出　　处：《Journal of Systematics and Evolution》2022年第1期55-72,共18页植物分类学报（英文版）

摘　　要：Bakerantha is one of the three genera of subfamily Hechtioideae(Bromeliaceae).This genus was reestablished recently,and it currently contains four species(B.caerulea,B./unde/"orum,B.purpusii,and B.tillandsioides),which are distributed throughout the central region of Mexico.Bakerantha tillandsioides has the widest geographical distribution of the four species,and some populations currently referred to it do not match the species description.In this study,we used extensive sampling(81 accessions)of four plastid regions(matK,rp/32-tmL,rpsi6-trnK,and ycfi)and the nuclear PRK gene to reconstruct the phylogenetic relationships and delimit the species boundaries in Bakerantha.Our results confirm the monophyly of Bakerantha,and the species delimitation analysis supports five evolutionary lineages within Bakerantha,showing that B.tillandsioides is nonmonophyletic as currently circumscribed.Diagnostic characters and coherent geographical distributions support the five lineages.On the basis of our results,we describe and illustrate B.hidalguense as a new species and provide evidence that B.caerulea is morphologically and ecologically di幵erent什om B.t,7landsfo/des,with which it has been confused in the past.Additionally,we provide a morphological key to the Bakerantha species.

关 键 词：biogeographical provinces IUCN Mexico molecular phylogenetics new species species delimitation 

分 类 号：Q94[生物学—植物学]