Phylogenetic relationships of the Magnoliaceae inferred from cpDNA matK sequences |
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| Authors: | S. Shi H. Jin Y. Zhong X. He Y. Huang F. Tan D. E. Boufford |
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| Affiliation: | (1) School of Life Sciences, Zhongshan University, Guangzhou 510275, Guangdong, China e-mail: lssssh@zsu.edu.cn Tel.: 86-20-84113677, Fax: 86-20-84036551, CN;(2) Institute of Biodiversity Science, School of Life Sciences, Fudan University, Shanghai 200433, and Wuhan Institute of Botany, Academia Sinica, Wuhan 430074, China, CN;(3) Harvard University Herbaria, 22 Divinity Avenue, Cambridge, MA 02138-2020, USA, US |
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| Abstract: | The coding region of the matK gene was sequenced to infer the phylogeny of the family Magnoliaceae. Phylogenetic analyses of 21 matK sequences representing ten genera of Magnoliaceae and three outgroups suggest relationships among both subfamilies and genera. Monophyly of the subfamily Liriodendroideae (the genus Liriodendron) and the subfamily Magnolioideae is strongly supported, respectively. Within the subfamily Magnolioideae, three clades are formed: (1) the genus Magnlietia, (2) the subgenus Magnolia, and (3) the subgenus Yulania, with the genera Michelia, Paramichelia, Tsoongiodendron, Alcimandra, Kmeria, Parakmeria and Manglietiastrum. However, the genus Magnolia is shown to be a polyphyletic group, and the genus Michelia a paraphyletic group. Relatively low sequence divergences are detected among genera of the the subfamily Magnolioideae, ranging from 0.14% to 1.70%, especially in the tribe Micheliinae (0.14–0.98%). Molecular evidence from matK sequence data suggests that the phylogenetic positions and the delimitation of the eight genera Magnolia, Michelia, Tsoongiodendron, Paramichelia, Alcimandra, Kmeria, Parakmeria and Manglietiastrum need to be reconsidered. Received: 2 January 2000 / Accepted: 12 February 2000 |
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| Keywords: | Magnoliaceae Molecular phylogeny Chloroplast DNA matK gene |
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