植物分类学报    2008 46 (2): 130-141    ISSN: 0529-1526  CN: 11-1897/Q  首页     当期目录 上一期    下一期

 
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Inference of phylogenetic relationships among key angiosperm lineages using a compatibility method on a molecular data set

仇寅龙 George F. ESTABROOK

(Department of Ecology & Evolutionary Biology, The University of Michigan, Ann Arbor, MI 48109-1048, USA)

收稿日期 2007-12-13   修回日期 2008-2-18   网络版发布日期  2008-3-7   接受日期 
摘要  Phylogenetic relationships among the five key angiosperm lineages, Ceratophyllum, Chloranthaceae, eudicots, magnoliids, and monocots, have resisted resolution despite several large-scale analyses sampling taxa and characters extensively and using various analytical methods. Meanwhile, compatibility methods, which were explored together with parsimony and likelihood methods during the early development stage of phylogenetics, have been greatly under-appreciated and not been used to analyze the massive amount of sequence data to reconstruct the basal angiosperm phylogeny. In this study, we used a compatibility method on a data set of eight genes (mitochondrial atp1, matR, and nad5, plastid atpB, matK, rbcL, and rpoC2, and nuclear 18S rDNA) gathered in an earlier study. We selected two sets of characters that are compatible with more of the other characters than a random character would be with at probabilities of pM<0.1 and pM<0.5 respectively. The resulting data matrices were subjected to parsimony and likelihood bootstrap analyses. Our unrooted parsimony analyses showed that Ceratophyllum was immediately related to eudicots, this larger lineage was immediately related to magnoliids, and monocots were closely related to Chloranthaceae. All these relationships received 76%–96% bootstrap support. A likelihood analysis of the 8 gene pM<0.5 compatible site matrix recovered the same topology but with low support. Likelihood analyses of other compatible site matrices produced different topologies that were all weakly supported. The topology reconstructed in the parsimony analyses agrees with the one recovered in the previous study using both parsimony and likelihood methods when no character was eliminated. Parts of this topology have also been recovered in several earlier studies. Hence, this topology plausibly reflects the true relationships am

关键词
  

angiosperm   Ceratophyllum   character analysis   Chloranthaceae   compatibility   eudicots   magnoliids   monocots   phylogenetic method   phylogeny

 

分类号
DOI:  10.3724/SP.J.1002.2008.07165
 

通讯作者:
仇寅龙, George F. ESTABROOKpx);} ylqiu@umich.edu; gfe@umich. educompqrd
作者个人主页: 仇寅龙 George F. ESTABROOK