@article {Malinska:2011-04-01T00:00:00:0040-0262:348, author =
"Malinska, Hana and Tate, Jennifer A. and Mavrodiev, Evgeny and
Matyasek, Roman and Lim, K. Yoong and Leitch, Andrew R. and
Soltis, Douglas E. and Soltis, Pamela S. and Kovarik, Ales",
title = "Ribosomal RNA genes evolution in Tragopogon: A story of
New and Old World allotetraploids and the synthetic lines",
journal = "Taxon", volume = "60", number = "2", year =
"2011-04-01T00:00:00", abstract = "Tragopogon mirus Ownbey and
Tragopogon miscellus Ownbey are recent allotetraploids that have
formed recurrently within the last 80 years, following the
introduction of the diploids T. dubius Scop., T. pratensis L.
and T. porrifolius L. from Europe to North America. In some
areas, the progenitor diploids still occur along with expanding
populations of the allotetraploids, and the polyploids at those
locations likely represent descendents of the nearby diploids.
In most natural populations of T. mirus and T. miscellus, there
are far fewer rDNA units of the