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(American Journal of Botany. 2003;90:1229-1238.)
© 2003 Botanical Society of America, Inc.


Systematics

A first molecular phylogenetic analysis of Passiflora (Passifloraceae)1

Valéria C. Muschner2, Aline P. Lorenz2, Armando C. Cervi3, Sandro L. Bonatto4, Tatiana T. Souza-Chies5, Francisco M. Salzano2 and Loreta B. Freitas2,6

2Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, 91501-970 Porto Alegre, RS, Brazil; 3Departamento de Botânica, Universidade Federal do Paraná, Caixa Postal 19031, 81531-970 Curitiba, PR, Brazil; 4Centro de Biologia Genômica e Molecular, Faculdade de Biociências, Pontifícia Universidade Católica do Rio Grande do Sul, Ipiranga 6681, 90610-001 Porto Alegre, RS, Brazil; 5Departamento de Botânica, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Prédio 43433, 90509-900 Porto Alegre, RS, Brazil

Passiflora, a genus with more than 400 species, exhibits a high diversity of floral and vegetative structures and a complex taxonomy, which includes 23 subgenera and many sections and series. To better understand Passiflora's variability and interspecific relationships, the phylogeny of 61 species, classified in 11 of 23 suggested subgenera, was investigated. Three molecular markers were used, the nuclear ribosomal internal transcribed spacers (nrITS), the plastid trnL-trnF spacer regions (~1000 bp), and the rps4 plastid gene (~570 bp). Three major clades were highly supported, independent of the marker and phylogenetic method used; one included the subgenera Distephana, Dysosmia, Dysosmioides, Passiflora, and Tacsonioides, a second, the subgenera Adopogyne, Decaloba, Murucuja, and Pseudomurucuja, and a third, the subgenus Astrophea. We call these the Passiflora, Decaloba, and Astrophea clades, respectively. The position of subgenus Deidamioides is undefined. The monophyly of Passiflora could not be statistically corroborated, and the relationships among the major clades and of these clades with the related genera remain unresolved. Our results indicate that a reevaluation of the monophyly of Passiflora and its infrageneric classification is necessary.

Key Words: ITS • Passiflora • Passifloraceae • phylogenetic analysis • rps4trnL-trnF


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