In: Plant Systematics and Evolution, 2011, vol. 293, no. 1-4, p. 237-245
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In: Botanica Helvetica, 2009, vol. 119, no. 1, p. 41-51
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In: Plant Systematics and Evolution, 2016, vol. 302, no. 5, p. 575–584
Recent cytological and molecular studies have investigated genome size variation and evolution in the homosporous ferns, but representatives of the Ophioglossaceae were largely overlooked, despite their evolutionary singularity. Flow cytometry analysis was performed on 41 individuals of eight species of the genera Botrychium (B.), Botrypus, and Sceptridium to estimate their ploidy level...
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In: Molecular Phylogenetics and Evolution, 2012, vol. 62, no. 2, p. 612–623
Spotted knapweed (Centaurea stoebe) occurs from Western Asia to Western Europe both as diploid and tetraploid cytotypes, predominantly in single-cytotype populations with higher frequency of diploid populations. Interestingly, only tetraploids have been recorded so far from its introduced range in North America where they became highly invasive. We performed phylogenetic and network analyses of...
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In: Plant Systematics and Evolution, 2011, vol. 293, p. 237-245
Although reticulation has indisputably played an important role in the evolutionary history of the genus Hieracium s. str. (Asteraceae), convincingly documented cases of recent interspecific hybridization are very rare. Here we report combined evidence on recent hybridization between two diploid species, Hieracium alpinum and H. transsilvanicum. The hybrid origin...
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In: Botanica Helvetica, 2009, vol. 119, no. 1, p. 41-51
Hieracium alpinum L. (Asteraceae) is an arctic-alpine species distributed throughout Europe with both diploid and triploid cytotypes. We determined the ploidy levels of plants from 23 populations from Austria, Bosnia and Herzegovina, Finland, Italy, Norway, Romania, Slovakia, Switzerland and Ukraine. Data showed a non- overlapping pattern of cytotype distribution: sexually reproducing diploids...
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