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RESEARCH PRODUCT
Chloroplast DNA evidence for introgression and long distance dispersal in the desert annualSenecio flavus (Asteraceae)
Aaron ListonJoachim W. Kadereitsubject
Phylogenetic treeChloroplast captureDisjunct distributionfood and beveragesIntrogressionPlant ScienceBiologyequipment and suppliesGenomeRestriction siteChloroplast DNABotanybacteriaBiological dispersalheterocyclic compoundsskin and connective tissue diseasesEcology Evolution Behavior and Systematicsdescription
Phylogenetic analysis of chloroplast DNA (cpDNA) restriction site variation supports a close genetic relationship between the Southwest AsianSenecio flavus subsp.breviflorus and the North AmericanS. mohavensis. The intercontinental disjunct distribution of these two desert annuals may have originated via long distance dispersal. The chloroplast genomes of the Southern and North AfricanS. flavus subsp.flavus and subsp.breviflorus differ by at least ten restriction sites, while at most two restriction sites differentiate the cpDNA genomes of subsp.breviflorus and the outgroupS. squalidus. This suggests that the cpDNA genome ofS. flavus subsp.breviflorus may have resulted from introgression and chloroplast capture with a Mediterranean species related toS. squalidus. This hypothesized introgression could account for the morphological distinctiveness and duplicated isozyme loci ofS. flavus subsp.breviflorus relative to subsp.flavus.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-01-01 | Plant Systematics and Evolution |