02647nas a2200277   4500008004100000245015100041210006900192260000800261300001400269490000700283520165900290653002101949653001901970653002601989653002202015653001402037653001402051653001402065653002702079100002402106700002502130700002702155700002502182700002902207856013302236       2005                        eng d00aMolecular phylogenetics of the Macaronesian-endemic genus Bystropogon (Lamiaceae): palaeo-islands, ecological shifts and interisland colonizations0 aMolecular phylogenetics of the Macaronesianendemic genus Bystrop  cApr  a1177–890 v143 aAbstract A molecular phylogenetic study of Bystropogon L'Her. (Lamiaceae) is presented. We performed a cladistic analysis of nucleotide sequences of the internal transcribed spacers (ITS), of the nuclear ribosomal DNA, and of the trnL gene and trnL-trnF intergenic spacer of the chloroplast DNA. Bystropogon odoratissimus is the only species endemic to the Canary Islands that occurs in the three palaeo-islands of Tenerife. This species is not part of an early diverging lineage of Bystropogon and we suggest that it has a recent origin. This phylogenetic pattern is followed by most of the species endemic to the palaeo-islands of Tenerife. The two sections currently recognized in Bystropogon form two monophyletic groups. Taxa belonging to the section Bystropogon clade show interisland colonization limited to the Canary Islands with ecological shifts among three ecological zones. Taxa from the section Canariense clade show interisland colonization both within the Canary Islands and between the Canary Islands and Madeira. Speciation events within this clade are mostly limited to the laurel forest. The genus has followed a colonization route from the Canaries towards Madeira. This route has also been followed by at least five other plant genera with species endemic to Macaronesia. Major incongruences were found between the current infrasectional classification and the molecular phylogeny, because the varieties of Bystropogon origanifolius and Bystropogon canariensis do not form two monophyletic groups. The widespread B. origanifolius appears as progenitor of the other species in section Bystropogon with a more restricted distribution.10aDNA: Chloroplast10aDNA: Ribosomal10aDNA: Ribosomal Spacer10aGenetic Variation10aGeography10aLamiaceae10aPhylogeny10aSequence Analysis: DNA1 aTrusty, Jennifer, L1 aOlmstead, Richard, G1 aSantos-Guerra, Arnoldo1 aSá-Fontinha, Susana1 aFrancisco-Ortega, Javier  uhttps://lamiaceae.myspecies.info/content/molecular-phylogenetics-macaronesian-endemic-genus-bystropogon-lamiaceae-palaeo-islands