Implications of a molecular phylogenetic study of the Malagasy genus Cedrelopsis and its relatives (Ptaeroxylaceae)

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• 作者：Sylvain G. Razafim ; imbison ; Marc S. Appelhans ; Harison Rabarison ; Thomas Haevermans ; Andriarimalala Rakotondrafara ; Stephan R. Rakoton ; rasana ; Michel Ratsimbason ; Jean-Noë ; l Labat ; Paul J.A. Ke&#x
• 关键词：Biogeography ; Bottegoa ; Cedrelopsis ; Evolution of seed number ; Ptaeroxylon ; Ptaeroxylaceae ; Rutaceae sensu lato ; Spathelioideae ; Sapindales
• 刊名：Molecular Phylogenetics and Evolution
• 出版年：2010
• 出版时间：October 2010
• 年：2010
• 卷：57
• 期：1
• 页码：258-265
• 全文大小：522 K

文摘

Ptaeroxylaceae is an Afro-Malagasy family containing three genera, Bottegoa, Cedrelopsis, and Ptaeroxylon. Although the family is morphologically well delimited, it is currently considered part of the subfamily Spathelioideae in a broadly circumscribed orange family (Rutaceae). The Malagasy Cedrelopsis has traditionally been associated with different families of the order Sapindales and its phylogenetic placement in Rutaceae sensu lato has yet to be tested with molecular data. The present molecular phylogenetic study reaffirms the monophyly of Ptaeroxylaceae and its placement in Spathelioideae. Therefore, molecules and morphology support close affinities between Bottegoa, Cedrelopsis, and Ptaeroxylon and also their current generic circumscriptions. We report a case of an evolutionary change from one-seeded to two-seeded carpels within the Harrisonia-Cneorum-Ptaeroxylaceae clade of Spathelioideae. Finally, the sister-group relationship between the African Bottegoa and the Afro-Malagasy Ptaeroxylon-Cedrelopsis clade suggests an African origin of Cedrelopsis.