PHYLOGENETIC ANALYSIS OF CREMANTHODIUM (COMPOSITAE)

Cremanthodium Benth, is an endemic genus of the Sino-Himalayan region, and is believed to comprise approximately 60 species. Wulif (1944) and Drury (1967) considered Cremanthodium as an alpine race or ecotype of Ligularia. To the contrast Jeffrey and Chen (1984) who supported its segregation and con...

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Bibliographic Details
Published inJournal of Plant Research Vol. 114; no. suppl; p. 49
Main Authors Maruo Munemasa, Hideaki Ohba
Format Journal Article
LanguageJapanese
Published The Botanical Society of Japan 2001
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Summary:Cremanthodium Benth, is an endemic genus of the Sino-Himalayan region, and is believed to comprise approximately 60 species. Wulif (1944) and Drury (1967) considered Cremanthodium as an alpine race or ecotype of Ligularia. To the contrast Jeffrey and Chen (1984) who supported its segregation and considered Cremanthodium as a distinct genus from Ligularia in having a solitary nodding capitulum. We present an estimated phylogeny of both genera and related genera using molecular data from the internal transcribed spacer region of nuclear ribosomal DNA (ITS) for the first time. It was supported that Cremanthodium, Ligularia, Syneilesis, Parasenecio, and Farfugium formed a monophyletic group, but relation of each genus was not clarified because parsimonious informative sequences were too few in these groups. Our analysis revealed that Tephroseris, Sinosenecio, Nemosenecio comprised a monophyletic group. The analysis indicated that Cremanthodium and Ligu1aria were paraphyletic associates, and the dade of C. delavayi with some Ligularia species was strongly supported. The proper character of Cremanthodium which were regarded by Liu (Liu 1989) and Jeffrey & Chen (Jeffrey & Chen 1984) is not synapomorphic. Thus Cremanthodium is regarded as an artificial assemblage.
ISSN:0918-9440