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Phylogenetic position ofSchnabelia, a genus endemic to China: Evidence from sequences of cpDNAmatK gene and nrDNA ITS regions

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Chinese Science Bulletin

Abstract

The chloroplast gene matK and the internal transcribed spacers (ITS) of the nuclear ribosomal DNA fromSchnabelia, a genus endemic to China, and 6 genera of Verbenaceae and 13 genera of Lamiaceae were sequenced. The phylogenetic signal and validity outgroups were measured and evaluated by means of the relatively apparent synapomorphy analysis (RASA). Independent and combined phylogenetic analyses for the matK and ITS sequences were performed using the maximum parsimony (MP), neighborjoining (NJ) and maximum likelihood (ML) methods, indicating thatSchnabelia oligophylla andCaryopteris terniflora form a sister-group relationship. TheCaryopteris complex is not shown to be a monophyly becauseTrichostema, C. paniculata andC. forrestii are paraphyletic to the clade containing the remaining members of the complex. A monophyly of Ajugoideae proposed by Cantino et al., including 8 genera in this study, is strongly supported and the closest relatives ofSchnabelia are in the Ajugoideae (Lamiaceae), especially nearCaryopteris terniflora. The polygenetic analyses also showed that the genera of Lamiaceae and Verbenaceae sampled in this tudy are phylogenetically mixed and the genusAvicennia is distant to other genera of Verbenaceae. RASA and combined analysis can be used as effective approaches to determining the relationships among phylogenetically complex groups.

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Authors and Affiliations

  1. State key Laboratory for Biocontrol, School of Life Sciences, Zhongshan University, 510275, Guangzhou, China

    Suhua Shi, Yaqing Du, Xun Gong, Yelin Huang & Hanghang He

  2. Harvard University Herbaria, 22 Divinity Avenue, 02138-2020, Cambridge, MA, USA

    D. E. Boufford & Yang Zhong

  3. Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, 200433, Shanghai, China

    Suhua Shi, Yaqing Du, D. E. Boufford, Xun Gong, Yelin Huang, Hanghang He & Yang Zhong

Authors
  1. Suhua Shi
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  2. Yaqing Du
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  3. D. E. Boufford
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  4. Xun Gong
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  5. Yelin Huang
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  6. Hanghang He
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  7. Yang Zhong
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Correspondence to Suhua Shi or Yang Zhong.

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Shi, S., Du, Y., Boufford, D.E. et al. Phylogenetic position ofSchnabelia, a genus endemic to China: Evidence from sequences of cpDNAmatK gene and nrDNA ITS regions. Chin. Sci. Bull. 48, 1576–1580 (2003). https://doi.org/10.1007/BF03183964

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  • DOI: https://doi.org/10.1007/BF03183964

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