植物分类学报    2008 46 (3): 349-374    ISSN: 0529-1526  CN: 11-1897/Q  首页     当期目录 上一期    下一期

 
RESEARCH ARTICLES
扩展功能
本文信息
 Supporting info
 PDF(1316KB)
 [HTML全文](0KB)
 参考文献[PDF]
 参考文献
服务与反馈
把本文推荐给朋友
 加入我的书架
 加入引用管理器
 引用本文
 Email Alert
相关信息
本文作者相关文章
· 向秋云
·

追溯山茱萸科植物的性状进化和生物地理学历史——方法选择的影响?

向秋云 *, David T. THOMAS

(Department of Plant Biology, North Carolina State University, Raleigh, NC 27695, USA)

收稿日期 2008-4-17   修回日期 2008-5-4   网络版发布日期  2008-5-9   接受日期 
摘要  

This study compares results on reconstructing the ancestral state of characters and ancestral areas of distribution in Cornaceae to gain insights into the impact of using different analytical methods. Ancestral character state reconstructions were compared among three methods (parsimony, maximum likelihood, and stochastic character mapping) using MESQUITE and a full Bayesian method in BAYESTRAITS and inferences of ancestral area distribution were compared between the parsimony-based dispersal-vicariance analysis (DIVA) and a newly developed maximum likelihood (ML) method. Results indicated that among the six inflorescence and fruit char-acters examined, “perfect” binary characters (no homoplasy, no polymorphism within terminals, and no missing data) are little affected by choice of method, while homoplasious characters and missing data are sensitive to methods used. Ancestral areas at deep nodes of the phylogeny are substantially different between DIVA and ML and strikingly different between analyses including and excluding fossils at three deepest nodes. These results, while raising caution in making conclusions on trait evolution and historical biogeography using conventional methods, demonstrate a limitation in our current understanding of character evolution and biogeography. The biogeographic history favored by the ML analyses including fossils suggested the origin and early radiation of Cornus likely occurred in the late Cretaceous and earliest Tertiary in Europe and intercontinental disjunctions in three lineages involved movements across the North Atlantic Land Bridge (BLB) in the early and mid Tertiary. This result is congruent with the role of NALB for post-Eocene migration and in connecting tropical floras in North America and Africa, and in eastern Asia and South America. However, alternative hypotheses with an origin in eastern Asia and early Trans-Beringia migrations of the



关键词
  

AReA   BAYESTRAITS   BEAST, biogeography   chromosome evolution   Cornaceae   fruit and inflorescence evolution   LAGRANGE   MESQUITE   divergence time

 

分类号
DOI:  10.3724/SP.J.1002.2008.08056
 

通讯作者:
向秋云 jenny_xiang@ncsu.edulu r
作者个人主页: 向秋云 *; David T. THOMAS