A new phylogeny of Rumex (Polygonaceae) adds evolutionary context to the diversity of reproductive systems present in the genus

PhytoKeys - Tập 204 - Trang 57-72
Kirstie D. Grant1, Daniel M. Koenemann2, Janet Mansaray3, Aisha M.A. Ahmed2, Hamid Khamar4,5, Jalal El Oualidi4, Janelle M. Burke2
1Department of Biological Sciences, Florida Agricultural & Mechanical University, Tallahassee, FL, USA.
2Department of Biology, Howard University, Washington, DC, USA.
3Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, USA
4College of Medicine, Howard University, Washington, DC, USA
5Département de Botanique et Ecologie Végétale, Institut Scientifique, Université Mohammed V de Rabat, Rabat, Morocco.

Tóm tắt

Rumexis one of about 50 genera in the knotweed family, Polygonaceae. The genus comprises about 200 species with bisexual, or more commonly, unisexual flowers, with the species displaying monoecious, dioecious, synoecious (hermaphroditic) or polygamous reproductive systems. Some of the dioecious species have heteromorphic sex chromosomes, which is rare amongst angiosperms. We here present a plastid phylogeny of 67 species, representing all four subgenera. For this study, we used three chloroplast markers,rbcL,trnH-psbA,trnL-Fand dense taxon sampling to reconstruct the most comprehensive molecular phylogeny ofRumexto date. The reconstructed phylogeny for this work resolves six major clades and one large grade in Rumex subg. Rumex. In addition, the species with known dioecious reproductive systems are resolved within a broader clade we term “the dioecious clade”. These results suggest that the species with divergent reproductive systems are more closely related to each other than to other species comprising the rest of theRumexgenus.

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PhytoKeys

Tập 204

57-72

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