Phylogeny and Biogeography of the Eastern North American Rose Gentians (Sabatia, Gentianaceae)

Autor:	Guilhem Mansion, Katherine G. Mathews, Michelle S. Ruigrok
Rok vydání:	2015
Předmět:	Gentianaceae biology Phylogenetic tree Sabatia Biogeography Plant Science biology.organism_classification Chloroplast DNA Sympatric speciation Evolutionary biology Phylogenetics Botany Genetics Clade Ecology Evolution Behavior and Systematics
Zdroj:	Systematic Botany. 40:811-825
ISSN:	1548-2324 0363-6445
DOI:	10.1600/036364415x689276
Popis:	Sabatia (Gentianaceae) contains ca. 20 species, distributed mainly on the U. S. A. Gulf and Atlantic Coastal Plains. Our aims were to determine 1) phylogenetic relationships among Sabatia species, 2) the time and place of Sabatia's origin and main areas of diversification, 3) relationships among sympatric species, and 4) how morphological and karyological characters evolved. We sequenced five noncoding cpDNA regions and nrITS for 30 accessions of Sabatia, Gyrandra, and Eustoma. Parsimony, likelihood, and Bayesian phylogenetic analyses were performed. Bayesian dating was done on a reduced-taxon, combined molecular dataset. The maximum clade credibility chronogram was used for ancestral area reconstruction and character optimization. Correlations between distributional, environmental and phylogenetic matrices were tested with spatial analyses. Phylogenetic analyses reveal that a Sabatia + Gyrandra clade diverged in the late Middle Miocene, with Sabatia subsequently splitting into western and easter...
Databáze:	OpenAIRE
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