Phylogenetic studies in the Paniceae (Poaceae): a realingment of Section Lorea of Panicum

SEDE, S.; MORRONE, O.; GIUSSANI, L.M.; ZULOAGA, F.O.

SYSTEMATIC BOTANY

Año: 2007

0363-6445

Abstract. The taxonomic status of Panicum Section Lorea has remained as "incertae sedis" within Panicum. To resolve its position within the Paniceae and to test the monophyly of this section, phylogenetic analyses based on chloroplast sequence data (ndhF) and morphology were conducted for the Paniceae with particular emphasis on Panicum Section Lorea. The results did not support the monophyly of this section. The species of this group were split in two clades which were neither related to each other nor to Panicum s.s. As a result, two new genera are proposed and described: Apochloa and Renvoizea, which are restricted to the Guiana highlands and eastern Brazil. The taxonomic status of Panicum Section Lorea has remained as "incertae sedis" within Panicum. To resolve its position within the Paniceae and to test the monophyly of this section, phylogenetic analyses based on chloroplast sequence data (ndhF) and morphology were conducted for the Paniceae with particular emphasis on Panicum Section Lorea. The results did not support the monophyly of this section. The species of this group were split in two clades which were neither related to each other nor to Panicum s.s. As a result, two new genera are proposed and described: Apochloa and Renvoizea, which are restricted to the Guiana highlands and eastern Brazil.