Plant Diversity ›› 2011, Vol. 33 ›› Issue (3): 261-268.DOI: 10.3724/SP.J.1143.2011.10188

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Phylogeny of the Chinese Endemic Fern Genus Neocheiropteris (Polypodiaceae)

 DU  Xin-Yu-1、2 , CHENG  Xiao-1   

  1. 1 Botanical Garden, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650204, China;
    2 Graduate University of Chinese Academy of Science, Beijing 100049, China
  • Received:2010-10-27 Online:2011-06-25 Published:2011-02-28


 Neocheiropteris is one of the four Chinese endemic fern genera. The taxonomic circumscription and systematic position of Neocheiropteris have always been argued among taxonomists since its establishment by Christ in 1905. The anatomical examination of Neocheiropteris and Neolepisorus is performed, and four chloroplast DNA markers: rbcL, rpS4 & rpS4-trnS IGS, trnL intron & trnL-trnF IGS and atpB & atpB-rbcL IGS for Neocheiropteris and its closely related taxa, totally 14 taxa are sequenced. Phylogenetic trees are constructed with the Maximum-parsimony, Maximum-likelihood and Bayesian inference method based on coded dataset/non-coded dataset/combined dataset. The division of Neocheiropteris and Neolepisorus is supported by both anatomical and molecular phylogeny evidence. Anatomical research provides support for the division of the two genera by their totally different characters of the division back and vein of frond, and for the close connection of the two genera by their common characters of rhizome scale. Molecular phylogeny research shows that: Neocheiropteris is sister to a clade that includes Tricholepidium and Lepidomicrosorium, and Neolepisorus is sister to the combination of above-mentioned three genera. The taxonomic circumscription and systematic position of Neocheiropteris are investigated by integrating anatomical characters and molecular phylogenetic results, only Neocheiropteris palmatopedata and N.triglossa should be treated as members of Neo-cheiropteris. The systematic position of N.triglossa is investigated based on molecular together with anatomical evidence for the first time.

Key words: Neocheiropteris, Phylogeny, Anatomy, Chloroplast DNA sequences

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