More characters or more taxa for a robust phylogeny - Case study from the coffee family (Rubiaceae)
More characters or more taxa for a robust phylogeny - Case study from the coffee family (Rubiaceae)
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DOI：
10.1080/106351599260085
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发表时间：
1999-09-01
影响因子：
6.5
通讯作者：
Kim, KJ
中科院分区：
文献类型：
--
作者：
Bremer, B;Jansen, RK;Kim, KJ
利用主要来自Rubiaceae植物科的不同数据集，以及部分来自Apocynaceae、Asteraceae、Lardizabalaceae、Saxifragaceae和Solanaceae的数据集，研究了性状数、分类群数和数据种类对系统发育树bootstrap值的影响。树内支持节点百分比与字符数呈正相关，与分类群数负相关。形态学分析基于较少的特征和弱支持树的期望。支持节点的百分比还取决于所分析的数据类型。在相同性状数的Rubiaceae分析中，RFLP数据比rbcL和形态学数据得到更高的支持节点百分比。我们还讨论了在家族和亚家族水平上特定节点的支持值。本文分析了两组新的茜草科ndhF和rbcL序列，并结合以往的研究结果，认为茜草科的单系性得到了支持，科内有3个支持较好但不易表征的大亚科rubiideae、Cinchonoideae s.s和Ixoroideae s.l，还有几个属（Luculia和Coptosapelta）未归属于亚科。
Using different data sets mainly from the plant family Rubiaceae, but in parts also from the Apocynaceae, Asteraceae, Lardizabalaceae, Saxifragaceae, and Solanaceae, we have investigated the effect of number of characters, number of taxa, and kind of data on bootstrap values within phylogenetic trees. The percentage of supported nodes within a tree is positively correlated with the number of characters, and negatively correlated with the number of taxa. The morphological analyses are based on few characters and weakly supported trees are expected. The percentage of supported nodes is also dependent on the kind of data analyzed. In analyses of Rubiaceae based on the same number of characters, RFLP data give trees with higher percentage of supported nodes than rbcL and morphological data. We also discuss the support values for particular nodes at the familial and subfamilial levels. Two new data sets of ndhF and rbcL sequences of Rubiaceae are analyzed and together with earlier studies of the family we can conclude that the monophyly of the Rubiaceae is supported and within the family there are three well supported, but not easily characterized, large subfamilies, Rubioideae, Cinchonoideae s.s. and Ixoroideae s.l. There are also a few genera (Luculia and Coptosapelta) unclassified to subfamily.