TY - JOUR T1 - Polyphyly of the genus Micromeria (Lamiaceae) - evidence from cpDNA sequence data JF - Taxon Y1 - 2005 A1 - C Brauchler A1 - H Meimberg A1 - T Abele A1 - G Heubl SP - 639–650 KW - Clinopodium KW - Dna-Sequences KW - Genera KW - Labiatae KW - Lamiaceae KW - Micromeria KW - Molecular phylogeny KW - Polyphyly KW - Trnk KW - trnL-F AB - Micromeria Benth. (Lamiaceae, Nepetoideac) is a very common genus in the Mediterranean region. To test the monophyly of the genus and to elucidate its phylogenetic placement within subtribe Menthinae (Dumort) Endl, of tribe Mentheae Dumort we performed parsimony analysis of trnK intron sequence data of 51 accessions representing 15 genera of Nepetoideae and two genera of subfamily Ajugoideae. Tree topology reveals a well-supported "core group" indicating four distinct lineages. The first one comprises three species of Satureja L. s.str., the second one includes taxa of the genus Clinopodium L. from both the Old and the New World, paraphyletic with respect to Monarda L. and two species of Micromeria section Pseudomelissa Benth. A third group contains all samples of the remaining Micromeria species. Within this monophyly, a western lineage including taxa, from NW Africa, the Balearic, and the Canary Islands, is sister to an eastern lineage with species distributed from SE Asia to the western Mediterranean. In a further clade the genera Thymbra L., Thymus L., and Origanum L. are grouped together. Combined analysis using a reduced dataset of trnK/trnL-F sequences increased support for the infrageneric resolution within Micromeria. Based on the phylogenetic reconstructions there is evidence that the genus as currently circumscribed is polyphyletic. Results are discussed in the context of morphology, karyology, and biogeography, outlining the necessity of removing section Pseudomelissa from Micromeria. VL - 54 ER - TY - JOUR T1 - Molecular evidence for adaptive radiation of Micromeria Benth. (Lamiaceae) on the Canary Islands as inferred from chloroplast and nuclear DNA sequences and ISSR fingerprint data JF - Molecular Phylogenetics and Evolution Y1 - 2006 DO - 10.1016/j.ympev.2006.05.037 A1 - Harald Meimberg A1 - Tilmann Abele A1 - Christian Braeuchler A1 - John K McKay A1 - Pedro L. Perez de Paz A1 - Guenther Heubl SP - 566–578 KW - Adaptive Radiation KW - Amplification KW - Asteraceae KW - Canary Islands KW - Colonization KW - Evolution KW - Fps2 KW - Genera KW - Hybridization KW - Issr Markers KW - Lamiaceae KW - Macaronesia KW - Micromeria KW - Phylogenetics KW - Ribosomal Dna KW - Tenerife KW - Trnk KW - Trnt-F AB - The Canary Islands have been a focus for phylogeographic studies on the colonization and diversification of endemic angiosperm taxa. Based on phylogeographic patterns, both inter island colonization and adaptive radiation seem to be the driving forces for speciation in most taxa. Here, we investigated the diversification of Allicromeria on the Canary Islands and Madeira at the inter- and infraspecific level using inter simple sequence repeat PCR (ISSR), the trnK-Intron and the trnT-trnL-spacer of the cpDNA and a low copy nuclear gene. The genus Micromeria (Lamiaceae, Mentheae) includes 16 species and 13 subspecies in Macaronesia. Most taxa are restricted endemics, or grow in similar ecological-conditions on two islands. An exception is M. varia, a widespread species inhabits the lowland scrub on each island of the archipelago and could represent an ancestral taxon from which radiation started on the different islands. Our analyses support a split between the "eastern" islands Fuerteventura, Lanzarote and Gran Canaria and the "western" islands Tenerife, La, Palma and El Hierro. The colonization of Madeira started from the western Islands, probably from Tenerife as indicated by the sequence data. We identified two lineages of Micromeria on Gomera but all other islands appear to be colonized by a single lineage, supporting adaptive radiation as the major evolutionary force for the diversification of Micromeria. We also discuss the possible role of gene flow between lineages of different Micromeria species on one island after multiple colonizations. (c) 2006 Elsevier Inc. All rights reserved. VL - 41 UR - http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WNH-4K48KGN-3&_user=2139813&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000054276&_version=1&_urlVersion=0&_userid=2139813&md5=2bfd7395b571326788d91322a9646cec ER -