Create your own conference schedule! Click here for full instructions

Abstract Detail


Deanna, Rocio [1], Barboza, Gloria Estela [1], Carrizo García, Carolina [1].

Phylogenetic relationships of Deprea: New insights into the evolutionary history of physaloid groups.

Deprea Raf. is the second genus, after Physalis L., with the highest species richness of the tribe Physalideae (Solanaceae). This neotropical genus currently comprises 50 species distributed from Bolivia to Colombia and Venezuela, with a single species found in Central America. The taxonomy of Deprea has been unstable and confusing after diverse and controversial assumptions about its position and circumscription. For example, recent phylogenetic analyses recovered Deprea as a member of Physalideae but the genus could not be confidently placed in any of its subtribes. Similarly, the circumscription of Deprea has been unclear since several authors considered it different from Larnax while others suggested that Deprea and Larnax form a natural group. In addition, biogeographical inferences of this group are scarce and only based on observations of the restricted area of distribution of some species. Here we undertook a molecular phylogenetic study of Deprea in order to establish the circumscription of the genus, resolve its position within the Physalideae, and reconstruct its biogeographical history. Forty three Deprea species (86 % of the genus) and 26 related taxa were sampled, three DNA markers (psbA-trnH, ITS and waxy) were analyzed, and maximum parsimony and Bayesian analyses were conducted. In order to reconstruct ancestral areas states, a Bayesian Binary MCMC model was applied. Deprea is resolved as a strongly supported monophyletic group according to its current circumscription and is placed within the Withaninae subtribe of Physalideae. The phylogenetic relationships reconstructed allow us to solve taxonomic problems such as rejection and acceptance of previous synonyms. The most probable ancestral area for Deprea was the Northern Andes from South America and the Amotape-Huancabamba (AT) zone, a topologically complex area at the border of Peru and Ecuador. The two clades within the AT zone account for the majority of the species richness in the genus. To date, this is the most extensive phylogenetic reconstruction in the genus Deprea, and it provides a framework for addressing new evolutionary questions, such as which morphological traits are related to the diversification of this species-rich genus.

Log in to add this item to your schedule

1 - Instituto Multidisciplinario de Biologia Vegetal (IMBIV, CONICET-UNC), Velez Sarsfield 299, Cordoba, Cordoba, 5000, Argentina

evolutionary history
neotropical species

Presentation Type: Oral Paper
Session: 41, Systematics III: Euasterids
Location: Sundance 4/Omni Hotel
Date: Wednesday, June 28th, 2017
Time: 2:00 PM
Number: 41003
Abstract ID:80
Candidate for Awards:None

Copyright © 2000-2017, Botanical Society of America. All rights reserved