Chloroplast DNA variation and reticulate evolution in sexual and apomictic sections of dandelions

  title={Chloroplast DNA variation and reticulate evolution in sexual and apomictic sections of dandelions},
  author={H{\aa}kan Wittzell},
  journal={Molecular Ecology},
  • H. Wittzell
  • Published 1 December 1999
  • Biology
  • Molecular Ecology
Sequencing of the trnL–trnF intergenic spacer in chloroplast DNA (cpDNA) from 237 sexual and apomictic species of dandelions (genus Taraxacum) from Europe, Asia and arctic North America revealed 46 haplotypes, which differed mainly by a variable number of polymorphic tRNA pseudogenes next to the trnF gene. The haplotypes could be divided into 20 cpDNA lineages, but independent duplications and deletions of the pseudogene copies made it difficult to further reconstruct the phylogeny… 
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Molecular phylogeny of Dipetrocarpaceae in Southeast Asia based on nucleotide sequences of matK, trnL intron, and trnL-trnF intergenic spacer region in chloroplast DNA.
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P pairwise comparisons among dicots and monocots for rbcL and two noncoding sequences of cpDNA show that these regions evolve faster (more than three times faster, on average) than rBCL, and that the trnL intron evolves at a rate that is the same as that of the intergenic spacer.
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  • Biology
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  • 1993
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Reticulate Evolution in the Polypodium vulgare Complex
The phylogenetic distribution of "sporangiasters" confirmed earlier hypotheses concerning the development of these novel structures from sporangial initials, and Revised phylogenetic hypotheses were used to extrapolate patterns of char- acter evolution with greater precision.
Biometry and DNA fingerprinting detect limited genetic differentiation among populations of the apomictic blackberry Rubus nessensis (Rosaceae)
  • H. Nybom
  • Biology, Environmental Science
  • 1998
Results indicate that a major part of the R. nessensis plants in Northern Europe have been derived from a single recombinational event, possibly making this genet the most widespread land-living organism in the world.