A phylogenetic study of Laeliinae (Orchidaceae) based on combined nuclear and plastid DNA sequences.

ABSTRACT:

Background and aims

Laeliinae are a neotropical orchid subtribe with approx. 1500 species in 50 genera. In this study, an attempt is made to assess generic alliances based on molecular phylogenetic analysis of DNA sequence data.

Methods

Six DNA datasets were gathered: plastid trnL intron, trnL-F spacer, matK gene and trnK introns upstream and dowstream from matK and nuclear ITS rDNA. Data were analysed with maximum parsimony (MP) and Bayesian analysis with mixed models (BA).

Key results

Although relationships between Laeliinae and outgroups are well supported, within the subtribe sequence variation is low considering the broad taxonomic range covered. Localized incongruence between the ITS and plastid trees was found. A combined tree followed the ITS trees more closel

SUBMITTER: van den Berg C 

PROVIDER: S-EPMC2720643 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature