摘要 : Tragopogon is a large Eurasian genus of approximately 150 species. Despite the use of 6910 aligned bp of sequence data representing seven loci, relationships within the genus remain largely unresolved. The young age of the genus i... 展开 Tragopogon is a large Eurasian genus of approximately 150 species. Despite the use of 6910 aligned bp of sequence data representing seven loci, relationships within the genus remain largely unresolved. The young age of the genus in combination with rapid diversification may be the best explanation for this poor resolution. Our studies have revealed that Geropogon is well supported as the immediate sister to Tragopogon. Sections Tragopogon, Brevirostris, Chro-mopappus, and Hebecarpus of traditional taxonomic treatments are largely monophyletic; sections Angustissimi, Majores, Collini, and Profundisulcati are non-monophyletic. The monotypic sections Macropogon, Dasypogon, and Dybjanskya appear within other sections and no longer merit recognition. Ourmolecular investigations of geographically widespread species in Europe, including 77 crocifolius, T. pratensis, T. porrifolius, and T orientalis, indicate that each may be non-monophyletic, comprising several cryptic species. These widespread diploidsare the proposed parents of some of the Eurasian allopolyploids, as well as the parents of the recently formed 77 minis and 77 miscellus from North America. 收起