Institut für Spezielle Botanik, Johannes Gutenberg-Universität Mainz, Bentzelweg 9b, 55099 Mainz, Germany.
Mol Phylogenet Evol. 2010 Feb;54(2):457-71. doi: 10.1016/j.ympev.2009.09.030. Epub 2009 Sep 29.
The cosmopolitan and ecologically diverse genus Veronica with approximately 450 species is the largest genus of the newly circumscribed Plantaginaceae. Previous analyses of Veronica DNA sequences were in stark contrast to traditional systematics. However, analyses did not allow many inferences regarding the relationship between major groups identified, hindering further analysis of diversification and evolutionary trends in the genus. To resolve the backbone relationships of Veronica, we added sequences from additional plastid DNA regions to existing data and analyzed matching data sets for 78 taxa and more than 5000 aligned characters from nuclear ribosomal DNA and plastid DNA regions. The results provide the best resolved and supported estimate of relationships among major groups in the Northern (Veronica s. str.) and Southern Hemisphere (hebes). We present new informal names for the five main species groups within the Southern Hemisphere sect. Hebe. Furthermore, in two instances we provide morphological and karyological characters supporting these relationships. Finally, we present the first evidence from nuclear low-copy CYCLOIDEA2-region to compare results from the plastid genome with the nuclear genome.
约有 450 个种的玄参科多生态和世界性的婆婆纳属是新定义的玄参科最大的属。先前对婆婆纳属 DNA 序列的分析与传统系统学形成鲜明对比。然而，这些分析并不能对主要类群之间的关系进行许多推断，阻碍了对该属多样性和进化趋势的进一步分析。为了解决婆婆纳属的骨干关系，我们将额外的质体 DNA 区域的序列添加到现有数据中，并对来自核核糖体 DNA 和质体 DNA 区域的 78 个分类群和 5000 多个对齐字符的匹配数据集进行了分析。结果提供了在北半球（真正的婆婆纳属）和南半球（赫柏组）主要类群之间关系的最佳分辨率和支持估计。我们为南半球赫柏组的五个主要种组提供了新的非正式名称。此外，在两种情况下，我们提供了支持这些关系的形态学和核型学特征。最后，我们首次提供了来自核低拷贝 CYCLOIDEA2 区的证据，以比较质体基因组与核基因组的结果。
