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Phylogeny of Stixeae and Borthwickiaceae Based on Morphological and Molecular Data

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  • 1School of Life Sciences, Shanxi Normal University, Linfen 041004, China
    2State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China

? These authors contributed equally to this paper

Received date: 2014-08-21

  Accepted date: 2015-01-27

  Online published: 2015-05-07

Abstract

Stixeae (including Stixis, Tirania, Neothorelia and Forchhammeria) and Borthwickia have traditionally been placed in Capparaceae. Recent molecular and morphological studies suggest Borthwickia as a new monotypic family. However, the positions and taxonomic ranks of Stixeae remain unresolved. To estimate the relationships of Stixeae, we reconstructed the phylogeny of the Gyrostemonaceae-Resedaceae-Forchhammeria-Tirania (GRFT) clade of the core Brassicales using maximum parsimony and Bayesian analysis with 20 morphological characters and five DNA regions (matK, rbcL, ndhF, trnL-F, and ITS). Our results strongly support Neothorelia as a new member of the GRFT clade; Neothorelia, Tirania and Stixis form a clade with strong support. The systematic position of Forchhammeria is still uncertain; molecular and morphological evidence support Borthwickiaceae as a new monotypic family.

Cite this article

Huiling Zhao, Limin Lu, Junxia Su, Zhiduan Chen . Phylogeny of Stixeae and Borthwickiaceae Based on Morphological and Molecular Data[J]. Chinese Bulletin of Botany, 2015 , 50(4) : 473 -481 . DOI: 10.11983/CBB14152

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