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最大似然法和贝叶斯推论与似然比检验探讨泽泻目系统发育关系

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2010年06期
页码:
796-804
栏目:
植物系统学与演化植物学
出版日期:
2010-11-15

文章信息/Info

Title:
Maximum likelihood, Bayesian inference and likelihood ratio tests in the molecular phylogeny of Alismatales
作者:
刘涛1李晓贤2 *
1. 云南农业大学 农学院,昆明 650201; 2. 中国科学院 昆明植物研究所,昆明 650204
Author(s):
LIU Tao1LI Xiao-Xian2 *
1. Faculty of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China; 2. Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China
关键词:
最大似然法贝叶斯推论似然比检验泽泻目系统发育分析rbcL序列
Keywords:
maximum likelihood (ML) Bayesian inference (BI) Hierarchical likelihood ratio tests (hLRTs)molecular phylogeny of Alismatales rbcL
分类号:
-
DOI:
-
文献标识码:
A
摘要:
应用最大似然法(ML)、贝叶斯推论(BI)、邻接法(NJ)和似然比检验(hLRTs)进行泽泻目分子系统学研究。所用的rbcL基因序列代表了泽泻目14科46属以及作为外类群的6相关属。研究结果表明,*等级制似然比检验表明泽泻目rbcL序列最适合的DNA进化模型为GTR+I+G,最大似然法、贝叶斯法和邻接法构建的系统发育树拓扑结构相似,没有显著的差异,但贝叶斯树支持率较高;泽泻目为一单系类群,由两个主要谱系分支构成,深层分布格局由5个主要分支构成。基于分子系统发育树,文中对泽泻目科间、水鳖科+茨藻科、泽泻科+花蔺科+黄花蔺科、和“Cymodoeaceae complex”的系统发育关系进行了讨论。研究结果还表明,泽泻目系统发育关系可能还需要更多的证据进一步的澄清。
Abstract:
Maximum likelihood,Bayesian inference,Neighbor Joining and Hierarchical likelihood ratio tests were employed to study the phylogeny of Alismatales. 52 rbcL sequences were used in the analysis to represent 14 families 46 genera,and 6 related genera as outgroup. Hierarchical likelihood ratio tests showed that GTR+I+G could be the best evolutionary model for rbcL dataset,and the topology of maximum likelihood tree was similar to those of Bayesian tree and Neighbor Joining tree,but Bayesian tree giving higher support values;Alismatales could be composed of two major clades and further divided into five clades. The phylogenetic relationship of “families of Alismatales”,“Hydrocharitaceae + Najadaceae”,“Alismataceae + Butomataceae + Limnocharitaceae”,and “Cymodoeaceae complex” were discussed based on the molecular phylogenetic trees. The result also showed that more researches were needed to explain phylogeny of Alismatales.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2011-01-28