A chloroplast DNA phylogeny of eastern Phlox (Polemoniaceae): implications of congruence and incongruence with the ITS phylogeny.
A chloroplast DNA phylogeny of eastern Phlox (Polemoniaceae): implications of congruence and incongruence with the ITS phylogeny.
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东部福禄考（Polemoniaceae）叶绿体 DNA 系统发育：与 ITS 系统发育的一致性和不一致的影响。
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
R. Jansen
中科院分区：
文献类型：
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作者：
C. Ferguson;R. Jansen
对独立演化过程的比较是研究演化模式和演化过程的一种有价值的方法。现有的数据对北美东部福禄考，包括我们最近的ITS同源性，表明关系是复杂的组和杂交可能是一个促成因素。我们使用的限制性位点的数据，叶绿体基因组开发东部福禄考第二个基因组。采样与ITS研究相同，由79个样品组成（包括所有22个东部福禄考种和大多数东部亚种，以及许多类群的多个种群）。由此产生的cpDNA同源性在许多方面与ITS同源性一致，加强了早期的结论。然而，树木之间的不一致是值得注意的：许多样本，特别是P. pilosa和P. glaberrima复合体的成员，被放置在不同的分支中。进行了各种各样的测试，以评估一致性的拓扑模式，字符一致性，同质性的数据集。根据杂交影响了本属的关系这一假设，讨论了显着的冲突之间的approgenies。
The comparison of independent phylogenies is a valuable approach to the study of evolutionary pattern and process. Available data on eastern North American Phlox, including our recent ITS phylogeny, suggest that relationships are complicated in the group and that hybridization may have been a contributing factor. We used restriction site data from the chloroplast genome to develop a second phylogeny for eastern Phlox. Sampling was the same as that for the ITS study and consisted of 79 samples (including all 22 eastern Phlox species and most eastern subspecies, as well as multiple populations of many taxa). The resulting cpDNA phylogeny agrees with the ITS phylogeny in many respects, strengthening earlier conclusions. Nevertheless, incongruence between the trees is noteworthy: many samples, particularly of members of the P. pilosa and P. glaberrima complexes, are placed in different clades. A variety of tests were carried out to assess congruence in terms of topological patterns, character congruence, and homogeneity of data sets. Significant conflict between the phylogenies is discussed in light of the hypothesis that hybridization has affected relationships in this genus.