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菝葜科东亚北美间断分布的Smilax hispida复合类群的进化历史(英文)

菝葜科东亚北美间断分布的Smilax hispida复合类群的进化历史(英...

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后植物志时代的系统与进化植物学——2011年全国系统与进化植物学暨第十届青年学术研讨会

作者： Kenneth M.Cameron Jenny Department of Plant Biology North Carolina State UniversityRaleighNC 27695U.S.A Department of Botany University of WisconsinMadisonWI 53706U.S.A

Disjunction is an important biogeographic pattern which used to be addressed using phylogenetic and historical biogeographic ***,there are extremely rare larger-scale, particularly inter-continental,phylogeographic investigations on closely related *** diversification and evolution of the disjunct taxa after divergence have also scarcely been ***, we applied phylogenetic and phylogeographic analyses to understand the evolutionary history of a morphologically static group,Smilax hispida complex(including ***(华东菝葜) and S. scobinicaulis(短梗菝葜) in east Asia;*** in northwest America;*** in northeast America;*** and *** in central America),with a broad eastern Asian and North-Central American *** phylogeographic analyses,we sequenced two cpDNA fragments(trnL-trnF and ycf6-trnC spacers) and also nuclear(ITS) region in 539 individuals from 64 populations of sampled throughout the six species’ *** present suite of molecular data strongly supports the monophyly of S. hispida complex and the first divergence between the intercontinental lineages as well as delineation of each of the six *** species complex most possibly originated in western North America and then dispersed into eastern Asia via the Bering land *** intracontinental divergence closely followed the intercontinental disjunction at 8 *** in Central America is the first diverged species in the American clade prior to *** in western North America at 5.1 *** divergence between S. hispida in eastern North America and *** in northern Mexico was estimated at 2.8 *** origin of temperate plants in Central America is more complex than what we have known *** earliest and latest diverged species in American clade,*** and ***,independently migrated into Central America in different times even up to 8.2 *** did occur between them during t

关键词： Northern Hemisphere disjunction intercontinental phylogeography eastern Asia North America Latin America Smilax hispida complex

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