@ARTICLE{TreeBASE2Ref19005, author = {Andrea Weeks and Kristen E. Baird and Conley K. McMullen}, title = {Origin and evolution of endemic Gal?pagos Cordia species (Boraginaceae s.l.).}, year = {2010}, keywords = {Gal?pagos, island evolution, Cordia, Boraginaceae, Varronia}, doi = {}, url = {http://}, pmid = {}, journal = {Molecular Phylogenetics and Evolution}, volume = {}, number = {}, pages = {}, abstract = {Four endemic Cordia species (Boraginaceae s.l.) occupy the Gal?pagos archipelago in addition to two native species. Three of the species comprise the C. leucophlyctis-complex (C. anderssonii, C. leucophlyctis, C. scouleri), whose species? limits are not well-marked but that is morphologically distinct from the fourth endemic species, C. revoluta. Sequence data from the nuclear rDNA ITS region and the cpDNA ndhF gene were gathered from 49 accessions of Galapagean Cordia from five islands in order to test the evolutionary relationships of endemic Cordia species, determine the probable geographic origin of their ancestor(s) and estimate their dates of divergence. All endemic species nest within Cordia section Varronia. We find little evidence of phylogenetic structuring of the C. leucophlyctis-complex but strongly divergent phylogenetic signals from nuclear and chloroplast genomes regarding its relationship to C. revoluta. Results are consistent with at least one ancestral hybridization event involving the Galapagean and northwestern South American native C. polycephala as the maternal parent, or a related species, and the widespread Central and South American species C. macrocephala. Fossil-based divergence time estimates indicate endemic species diverged from ancestral continental South American species ca. 1.12 to 4.5 Myr ago, which coincides with ages of exposed and subsided Gal?pagos islands.} }

• Go to search
• Citation
• Taxa
• Matrices
• Trees
• Analyses
• 

CiteULike

Delicious

Connotea