Abstract Detail

Population Genetics

Quintanilla, S R [1], Ortiz, P [1], Bernal, J E [1], Gomez, Alberto [1].

Molecular characterization and phylogenetic relationships among genera of the subtribe Oncidiinae (Epidendroideae: Orchidaceae) and a new genus tentatively called "Santanderella".

We propose to include the new genus "Santanderella" as an formally recognized within the subtribe Oncidiinae, one of the largest endemic groups in tropical and subtropical areas in Colombia. The address of the new genus is supported both by morphological characteristics as the data produced by molecular phylogenetic studies conducted in the field. The new genus is easily distinguished by the presence of a pseudobulb with conduplicate leaves, the bilobed clinandrium, shape of the pollinia, unlike its closest relative, the genus Macroclinium. The molecular analysis included 18 different species of the subtribe Oncidiinae, collected in different geographical areas from Colombia, which underwent amplification and sequencing of the matK gene and part of the intergenic region of trnK gene, in order to establish the phylogenetic relationships between and within these species. The aims of this study were: 1) to establish the phylogenetic relationships among different subgeneric and sectional endemic species of the subtribe Oncidiinae and new genus "Santanderella" with molecular data. 2) to correlate molecular data with morphological data in order to establish synapomorphies for clade well supported by molecular data, 3) to correlate molecular data with geographic data in order to evaluate possible processes of speciation.

Broader Impacts:
Tree of Life

1 - Pontificia Universidad Javeriana, Instituto de Genética, Cra 7 # 40-62, edificio 32, Bogotá D.C, 110231, Colombia

Keywords:
Oncidiinae
phylogeny
matK
trnK
DNA Characterization.

Presentation Type: Poster:Posters for Topics
Session: P
Location: Hall A/Convention Center
Date: Monday, August 2nd, 2010
Time: 5:30 PM
Number: PPG004
Abstract ID:478