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Abstract Detail



Systematics Section/ASPT

Zuluaga, Alejandro [1], Cameron, Kenneth M. [2].

Evolution of the hemi-epiphythic Aroids.

The subfamily Monsteroideae (Araceae) is the third richest clade in the family with about 500 species. It comprises mostly hemi-epiphytic or epiphytic species restricted to the tropics, with three interesting tropical disjunctions. First, using a subfamily dataset (ca. 100 taxa), and five plastid and two nuclear markers, we studied the systematics and historical biogeography of this clade. We found support for the monophyly of the main clades, and seven of the 12 genera within Monsteroideae, but found low rates of DNA diversification, and the lack of molecular markers suitable for species level phylogenies in the group. We found evidence for a Laurasian origin of the clade. At least one the tropical disjunctions (Monstera) was found to be the product of a previous widespread Boreotropical distribution, which seems to explain most of the Tropical Aroid disjunctions at the suprageneric, but not at the genus level. We found evidence for two more recent dispersal events among Tropical regions, at least one of them probably through long distance dispersal. Secondly, to overcome the lack of molecular information we used Genome Skimming within the genus Monstera. We were able to recover almost complete plastomes, ca. 40000 nucleotides of the mitochondrial coding regions, and ca. 5000 nucleotides from the nuclear ribosomal DNA, for 18 species of Monstera and two outgroups. We used this phylogeny to study the evolution of floral and fruit traits in the genus.


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1 - University Of Wisconsin-Madison, 430 Lincoln Drive, UWisconsin-Department Of Botany, Madison, WI, 53706, USA
2 - University Of Wisconsin, Department Of Botany, 154 Birge Hall, 450 Lincoln Drive, Madison, WI, 53706, USA

Keywords:
Araceae
Monsteroideae
Genome skimming
biogeography.

Presentation Type: Oral Paper:Papers for Sections
Session: 31
Location: Salon 4/The Shaw Conference Centre
Date: Tuesday, July 28th, 2015
Time: 8:15 AM
Number: 31002
Abstract ID:1223
Candidate for Awards:George R. Cooley Award


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