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Closely-related taxa influence woody species discrimination via DNA barcoding: Evidence from global forest dynamics plots

  • Nancai Pei
  • , David L. Erickson
  • , Bufeng Chen
  • , Xuejun Ge
  • , Xiangcheng Mi
  • , Nathan G. Swenson
  • , Jin Long Zhang
  • , Frank A. Jones
  • , Chun Lin Huang
  • , Wanhui Ye
  • , Zhanqing Hao
  • , Chang Fu Hsieh
  • , Shawn Lum
  • , Norman A. Bourg
  • , John D. Parker
  • , Jess K. Zimmerman
  • , William J. McShea
  • , Ida C. Lopez
  • , I. Fang Sun
  • , Stuart J. Davies
  • Keping Ma, W. John Kress
  • Chinese Academy of Forestry
  • Smithsonian Institution
  • Chinese Academy of Sciences
  • University of Maryland, College Park
  • Flora Conservation Department
  • Oregon State University
  • National Museum of Natural Science, Taiwan
  • National Taiwan University
  • Nanyang Technological University
  • University of Puerto Rico
  • National Dong Hwa University

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

To determine how well DNA barcodes from the chloroplast region perform in forest dynamics plots (FDPs) from global CTFS-ForestGEO network, we analyzed DNA barcoding sequences of 1277 plant species from a wide phylogenetic range (3 FDPs in tropics, 5 in subtropics and 5 in temperate zone) and compared the rates of species discrimination (RSD). We quantified RSD by two DNA barcode combinations (rbcL + matK and rbcL + matK + trnH-psbA) using a monophyly-based method (GARLI). We defined two indexes of closely-related taxa (G m/G t and S/G ratios) and correlated these ratios with RSD. The combination of rbcL + matK averagely discriminated 88.65%, 83.84% and 72.51% at the local, regional and global scales, respectively. An additional locus trnH-psbA increased RSD by 2.87%, 1.49% and 3.58% correspondingly. RSD varied along a latitudinal gradient and were negatively correlated with ratios of closely-related taxa. Successes of species discrimination generally depend on scales in global FDPs. We suggested that the combination of rbcL + matK + trnH-psbA is currently applicable for DNA barcoding-based phylogenetic studies on forest communities.

Original languageEnglish
Article number15127
JournalScientific Reports
Volume5
DOIs
StatePublished - 12 Oct 2015
Externally publishedYes

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