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Phylogeny of Scopolia Jacq. s. str. based on ITS sequences  

Kim, Young-Dong (Division of Life Sciences, Hallym University)
Paik, Jin-Hyub (Department of Biology, Kyung Hee University)
Kim, Sung-Hee (Division of Life Sciences, Hallym University)
Hong, Suk-Pyo (Department of Biology, Kyung Hee University)
Publication Information
Korean Journal of Plant Taxonomy / v.33, no.4, 2003 , pp. 373-386 More about this Journal
Abstract
Internal transcribed spacer (ITS) sequences of nuclear ribosomal DNA were determined for 14 individuals representing eight taxa from Scopolia s. str. and related genera, Anisodus and Atropanthe. We found that the ITS sequences of Korean endemic species, S. parviflora, are significantly different from its allied species, S. japonica. This is contradictory to traditional taxonomic treatments in which those species are regarded as conspecific. S. parviflora exhibited closer relationship to S. carniolica, which is disjunctly distributed in Europe. In spite of substantially high sequence divergence between S. japonica and S. parvlflora/S. carniolica clade, morphological resemblance is evident among the species. Morphological stasis concept (retardation of morphological differentiation or evolution of similar characters among the disjuncts in a similar ecological habitat) was referred to understand this rather unusual evolutionary feature. S. lutescens, another Korean endemic species, shared almost identical ITS sequences with S. parviflora. Lack of diagnostic character distinguishing the taxa suggests that they are conspecific. Anisodus carniolicoides, which was originally described in Scopolia, was grouped with A. luridus and A. tanguticus. The monophyletic Anisodus formed a sister group relationship with a monotypic genus Atropanthe.
Keywords
Phylogeny; Scopolia s. str.; Sequence variation; Anisodus; Atropanthe; ITS;
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