doctoralThesis
Filogenia molecular e tempo de divergência em Harpalyce (Leguminosae, Papilionoideae) e Sinopse Taxonômica da sect. Brasilianae
Fecha
2018-07-30Registro en:
SÃO MATEUS, Wallace Messias Barbosa. Filogenia molecular e tempo de divergência em Harpalyce (Leguminosae, Papilionoideae) e Sinopse Taxonômica da sect. Brasilianae. 2018. 222f. Tese (Doutorado em Sistemática e Evolução) - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2018.
Autor
São Mateus, Wallace Messias Barbosa
Resumen
HHarpalyce is one of the most representative genus of the tribe Brongniartieae (Leguminosae,
Papilionoideae) and includes about 35 species. The genus is characterized by shrub or
arboreal habit, peltate multicellular glandular trichomes, leaves imparipinnate, bilabiate calyx
(vexillar and carinal lips), dehiscent legume ans seeds strophiolate. In the last taxonomic
revision the genus was subdivided into three sections: Brasilianae, Cubenses and Harpalyce.
Although several works of phylogeny confirmed the monophyletic of the genus, no
representative sampling of all the morphological diversity of the taxa was obtained. The
objective of this study was to evaluate the monophyly of Harpalyce, its infrageneric
classification, to infer the time of divergence and to reconstruct the evolution of the ancestral
characters. In the present study, Harpalyce phylogenetic reconstructions were performed from
nuclear ribosomal DNA (ITS/5.8S + ETS) and chloroplast (matK/trnK + trnL intron)
sequences, involving a wide sampling of species belonging to all sections and other genera of
the tribe Brongniartieae. The results of the phylogenetic reconstructions demonstrated the
monophyletic of Harpalyce and the three sections. Molecular dating revealed that Harpalyce
diverged from other genera of the tribe Brongniartieae in the Oligocene 30.6 Ma and
diversified 21 Ma. In addition, the taxonomic revision of the sect. Brasilianae that includes a
key of identification, data on geographical distribution, taxonomic notes and state of
conservation of all the species; and the other study was the description of two new species.