贝叶斯推论及其在百合目分子系统学中的应用

Plant Diversity ›› 2007, Vol. 29 ›› Issue (02): 161-166.

贝叶斯推论及其在百合目分子系统学中的应用

陈士超^{1, 2}, 杨红¹, 李珊¹, 祝建¹, 傅承新²

1 同济大学生命科学与技术学院, 上海 200092; 2 浙江大学生命科学学院系统进化植物学与生物多样性实验室, 浙江杭州 310058

收稿日期:2006-07-10 出版日期:2007-04-25 发布日期:2007-04-25
通讯作者: 傅承新

Bayesian Inference and Its Application in the Molecular Phylogeny of Liliales

CHEN Shi-Chao^{1, 2}, YANG Hong¹, LI Shan¹, ZHU Jian¹, FU Cheng-Xin²

1 College of Life Science and Technology, Tongji University, Shanghai 200092, China;
2 College of Life Science, Zhejiang University, Hangzhou 310029, China

Received:2006-07-10 Online:2007-04-25 Published:2007-04-25
Contact: FU Cheng-Xin

摘要/Abstract

摘要： 贝叶斯推论作为进化生物学的最新进展, 在适用复杂模型、大型数据集、计算速度和结果容易解释等方面明显优于其它算法。本文简要介绍了贝叶斯推论原理及其在分子进化和系统发育研究中的重要性,并使用该方法对百合目主要类群的系统发育关系进行了重建。结果显示, 百合目rbcL 基因最适合的DNA进化模型为GTR + I + G, 贝叶斯法与距离法和最大简约法构建的系统发育树拓扑结构相似, 没有显著差异, 但是分辨率和支持率明显比后者高。贝叶斯分析结果显示, 百合目内划分的7 个科, 除Smilacaceae 科外, 其余各科均为高后验概率(PP = 1.0) 支持的单系类群; 文中作者还对各科间的系统关系进行了探讨。

关键词: 百合目, 贝叶斯推论, 系统发育FONT

Abstract: As a new method in evolutionary biology, Bayesian inference of phylogeny appears to have advantages over the other menthods in terms of dealing with complex models and large dataset, interpretation of the results, and computational efficiency. In this paper, we made a brief introduction to the significance of Bayesian inference in the molecular evolution and phylogenetic reconstruction, and its application in the molecular phylogeny of Liliales. The results indicate that the best model for DNA evolution of rbcL sequences in Liliales is GTR + I + G, and the topology of Bayesian tree is similar to those
of Maximum parsimonious tree and Neighbor Joining tree, but giving more resolution and higher support values. The Bayesian tree provides strong support (PP = 1.0) for the circumscription of families in Liliales, except for Smilacaceae . The interrelationships between families are also discussed.

Key words: Liliales

中图分类号:

Q 332
Q949

陈士超1, 2 , 杨红1 , 李珊1 , 祝建1 , 傅承新2 . 贝叶斯推论及其在百合目分子系统学中的应用[J]. Plant Diversity, 2007, 29(02): 161-166.

CHEN Shi-Chao^,, YANG Hong, LI Shan, ZHU Jian, FU Cheng-Xin. Bayesian Inference and Its Application in the Molecular Phylogeny of Liliales[J]. Plant Diversity, 2007, 29(02): 161-166.