Historical biogeography of the Southeast Asian and Malesian tribe Dissochaeteae (Melastomataceae)  

作　　者：Abdulrokhman Kartonegoro Sylvia Mota de Oliveira Peter C.van Welzen 

机构地区：[1]Naturalis Biodiversity Center,Leiden 2333 CR,The Netherlands [2]Research Center for Biology,Indonesian Institute of Sciences(LIPI),Jl.Jakarta-Bogor KM.46,Cibinong 16911,Indonesia [3]Institute of Biology Leiden(IBL),Leiden University,Leiden 2333 BE,The Netherlands

出　　处：《Journal of Systematics and Evolution》2022年第2期237-252,共16页植物分类学报（英文版）

基　　金：The authors thank the Indonesian Ministry of Research and Technology,National Agency for Research and Innovation for the Research and Innovation in Science and Technology Project(RISET-Pro)for the main funding of the project(World Bank Loan No.8245-ID).

摘　　要：The region of Tropical Southeast Asia and the Malay Archipelago is a very appealing area for research due to its outstanding biodiversity,being one of the most species-rich areas in the world with high levels of endemism,and due to its complex geological history.The high number of species in tribe Dissochaeteae(Melastomataceae)and their tendency to narrow endemism make the tribe an ideal group for examining biogeographic patterns.We sampled 58 accessions spread over 42 accepted and two undescribed species of the Dissochaeteae.Two nuclear(ETS,ITS)and four chloroplast regions(ndhF,psbK-psbL,rbcL,rpl16)were used for divergence time estimation and ancestral area reconstruction.Results from the molecular dating analysis suggest that the diversity of Dissochaeteae in the Southeast Asian region resulted from a South American ancestor in the late Eocene.The ancestor of the Dissochaeteae might have migrated from South America to Southeast Asia via North America and then entered Eurasia over the North Atlantic land bridge during the Eocene.The origin and early diversification of the Dissochaeteae in Southeast Asia dates back to the middle Oligocene,and most of the genera originated during the Miocene.Indochina and Borneo are most likely the area of origin for the most recent common ancestor of the Dissochaeteae and for many of the early diverging clades of some genera within Southeast Asia.

关 键 词：ancestral area reconstruction Dissochaeteae divergence time estimation historical biogeography MALESIA MELASTOMATACEAE SHRUBS Southeast Asia tropical rain forests 

分 类 号：Q94[生物学—植物学]