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Although revegetation activities are often accompanied by extensive release of translocated or cultivated individuals into natural communities, their potential effects on native populations are relatively unclear. Understanding the original genetic structures in natural habitats and how the patterns have been maintained in populations at revegetation sites is a critical first step in assessing current...
Agamospermous dandelions of hybrid origin between a native sexual diploid species (Taraxacum platycarpum Dahlst. or T. japonicum Koidz.) and an alien agamospermous triploid [T. officinale Weber and T. laevigatum (Willd.) DC.] are now widely distributed throughout mainland Japan. These hybrid dandelions are known to be genetically variable. We hypothesized that this variability is maintained by repeated...
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