Phylogenetic relationships within Pappophoreae s.l. (Poaceae: Chloridoideae): Additional evidence based on ITS and trnL-F sequence data

REUTEMANN AG; GIUSSANI LM; LUCERO, L.E.; TIVANO JC; VEGETTI A.C.

SOUTH AFRICAN JOURNAL OF BOTANY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2011 vol. 77 p. 693 - 702

0254-6299

Historically, Pappophoreae included the genera Cottea, Enneapogon, Kaokochloa, Pappophorum and Schmidtia. Some authors consider thistribe as a well-supported monophyletic group; while other evidences reveals Pappophoreae as polyphyletic, with Pappophorum separated from therest of the tribe. When the latter happens, it can form a clade with Tridens flavus. Molecular phylogenetic analyses of the subfamily Chloridoideaehave included few species of Pappophoreae; therefore, further research involving more representatives of this tribe is needed. With the aim ofproviding new evidence to help clarify the phylogenetic position of Pappophorum and its relationships with other genera of the tribe and thesubfamily Chloridoideae, eight new sequences of ITS and trnL-F regions of Pappophoreae species were generated. These sequences wereanalyzed together with other available sequence data obtained from GenBank, using maximum parsimony and Bayesian inference, for individual(trnL-F or ITS) or combined trnL-F/ITS data sets. All analyses reveal that Pappophoreae is polyphyletic, with Pappophorum separated from therest of the tribe forming a well-supported clade sister to Tridens flavus.