Polyploid speciation inHedera (Araliaceae): Phylogenetic and biogeographic insights based on chromosome counts and ITS sequences

@article{Vargas2004PolyploidSI,
  title={Polyploid speciation inHedera (Araliaceae): Phylogenetic and biogeographic insights based on chromosome counts and ITS sequences},
  author={Pablo Vargas and Hugh A. McAllister and Cynthia R Morton and Stephen L. Jury and Mike J Wilkinson},
  journal={Plant Systematics and Evolution},
  year={2004},
  volume={219},
  pages={165-179}
}
Variation in chromosome number and internal transcribed sequences (ITS) of nrDNA is used to infer phylogenetic relationships of a wide range ofHedera species. Polyploidy was found to be frequent inHedera, with diploid, tetraploid, hexaploid and octoploid populations being detected. Nucleotide additivity occurs in the ITS sequences of one tetraploid (H. hibernica) and two hexaploid species (H. maderensis, H. pastuchovii), suggesting that all three species originated by allopolyploidisation. ITS… CONTINUE READING
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