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YANG Xiao-Hui, ZHAO Xue-Li, GAO Xin-Fen. Morphological Variation and ITS Sequence Analysis of the Indigofera szechuensis Complex[J]. Plant Science Journal, 2015, 33(6): 727-733. DOI: 10.11913/PSJ.2095-0837.2015.60727
Citation: YANG Xiao-Hui, ZHAO Xue-Li, GAO Xin-Fen. Morphological Variation and ITS Sequence Analysis of the Indigofera szechuensis Complex[J]. Plant Science Journal, 2015, 33(6): 727-733. DOI: 10.11913/PSJ.2095-0837.2015.60727
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Morphological Variation and ITS Sequence Analysis of the Indigofera szechuensis Complex

  • 1.

    Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China,

  • 2. University of Chinese Academy of Sciences, Beijing 100049, China

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  • Received Date: July 08, 2015
  • Published Date: December 27, 2015
    Graphical Abstract
    • Abstract
  • The Indigofera szechuensis complex contains nine species: I. szechuensis, I. pendula, I. hancockii, I. franchetii, I. delavayi, I. lenticellata, I. rigioclada, I. calcicola and I. heterantha. In this study, we conducted morphological and ITS variation analyses of 240 samples from 31 populations. Analysis of means showed that the nine species of the I. szechuensis complex mainly differed in leaflet size and inflorescence length. Principal component analysis indicated that the maximal leaf length, leaflet trichomes, anther trichomes and leaflet length to width ratio were the main interspecific morphological differences. Phylogenetic analysis based on ITS sequences indicated that interspecific relationships within the I. szechuensis complex were not resolved, except for I. delavayi. We concluded that these eight species of the I. szechuensis complex might be undergoing species differentiation caused by the complex habitats and geological history of the Hengduan Mountain region.
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    • References (11)
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