TY - JOUR T1 - Evidence for nonallopatric speciation among closely related sympatric Heliotropium species in the Atacama Desert JF - Ecology and Evolution Y1 - 2014 A1 - Federico Luebert A1 - Jacobs, Pit A1 - HH Hilger A1 - Muller, Ludo A. H. SP - 266 EP - 275 AB - The genetic structure of populations of closely related, sympatric species may hold the signature of the geographical mode of the speciation process. In fully allopatric speciation, it is expected that genetic differentiation between species is homogeneously distributed across the genome. In nonallopatric speciation, the genomes may remain undifferentiated to a large extent. In this article, we analyzed the genetic structure of five sympatric species from the plant genus Heliotropium in the Atacama Desert. We used amplified fragment length polymorphisms (AFLPs) to characterize the genetic structure of these species and evaluate their genetic differentiation as well as the number of loci subject to positive selection using divergence outlier analysis (DOA). The five species form distinguishable groups in the genetic space, with zones of overlap, indicating that they are possibly not completely isolated. Among-species differentiation accounts for 35% of the total genetic differentiation (FST = 0.35), and FST between species pairs is positively correlated with phylogenetic distance. DOA suggests that few loci are subject to positive selection, which is in line with a scenario of nonallopatric speciation. These results support the idea that sympatric species of Heliotropium sect. Cochranea are under an ongoing speciation process, characterized by a fluctuation of population ranges in response to pulses of arid and humid periods during Quaternary times. VL - 4 SN - 2045-7758 UR - http://onlinelibrary.wiley.com/doi/10.1002/ece3.929/abstract IS - 3 JO - Ecol. Evol. ER - TY - JOUR T1 - Multiple origins for Hound’s tongues (Cynoglossum L.) and Navel seeds (Omphalodes Mill.) – The phylogeny of the borage family (Boraginaceae s.str.) JF - Molecular Phylogenetics and Evolution Y1 - 2013 A1 - M. Weigend A1 - Federico Luebert A1 - Federico Selvi A1 - Grischa Brokamp A1 - HH Hilger SP - 604 EP - 618 KW - Boraginaceae KW - Nutlet morphology KW - Phytogeography AB - AbstractRecent studies all indicated that both the affinities and subdivision of Boraginaceae s.str. are unsatisfactorily resolved. Major open issues are the placement and affinities of Boraginaceae s.str. in Boraginales and the major clades of the family, with especially the large tribes Cynoglosseae and Eritrichieae repeatedly retrieved as non-monophyletic groups, and the doubtful monophyly of several larger genera, especially Cynoglossum and Omphalodes. The present study addresses and solves these questions using two plastid markers (trnL–trnF, rps16) on the basis of a sampling including 16 outgroup taxa and 172 ingroup species from 65 genera. The phylogeny shows high statistical support for most nodes on the backbone and on the individual clades. Boraginaceae s.str. are sister to African Wellstediaceae, Wellstediaceae–Boraginaceae s.str. is sister to African Codonaceae. Echiochileae are retrieved as sister to the remainder of Boraginaceae s.str., which, in turn, fall into two major clades, the Boragineae–Lithospermeae (in a well-supported sister relationship) and the Cynoglosseae s.l. (including Eritrichieae). Cynoglosseae s.l. is highly resolved, with Trichodesmeae (incl. Microcaryum, Lasiocaryum) as sister to the remainder of the group. Eritrichieae s.str. (Eritrichium, Hackelia, Lappula) are resolved on a poorly supported polytomy together with the Omphalodes-clade (incl. Myosotidium, Cynoglossum p.p.), and the Mertensia-clade (incl. O. scorpioides, Asperugo). The Myosotideae (Myosotis, Trigonotis, Pseudomertensia) are retrieved in a well-supported sister-relationship to the core-Cynoglosseae, the latter comprising all other genera sampled. Cynoglossum is retrieved as highly para- and polyphyletic, with a large range of generic segregates embedded in Cynoglossum, but other species of Cynoglossum are sister to Microula or to the American “Eritrichieae” (Cryptantha and allied genera). Representatives of the genus Cynoglossum in its current definition are segregated onto six independent lineages, members of Omphalodes onto three independent lineages. At least 11 of the genera here sampled are deeply nested in other genera. The data show that individual details of nutlet morphology (e.g., winged margins, glochidia) are highly homoplasious. Conversely, a complex of nutlet characters (e.g., characters of the gynobase and cicatrix together with nutlet orientation and sculpturing) tends to circumscribe natural units. Geographical distribution of major clades suggests that the family originated in Africa and western Asia and radiated to eastern Eurasia, with several independent dispersal events into Australia and the New World. VL - 68 SN - 1055-7903 UR - http://www.sciencedirect.com/science/article/pii/S1055790313001590 IS - 3 JO - Molecular Phylogenetics and Evolution ER - TY - JOUR T1 - A revision of Heliotropium sect. Cochranea (Heliotropiaceae) JF - Kew Bulletin Y1 - 2013 A1 - Federico Luebert SP - 1 EP - 54 KW - Atacama Desert KW - Boraginales KW - Chile KW - Life Sciences, general KW - Peru KW - plant ecology KW - Plant sciences KW - Plant Systematics/Taxonomy/Biogeography KW - Taxonomy AB - A revision of the Heliotropium L. sect. Cochranea (Miers) Kuntze (Heliotropiaceae) is presented and a total of 17 species is recognised. Morphology, ecology, distribution, conservation status and phenology of all species are presented. One subspecies, Heliotropium krauseanum Fedde subsp. jahuayense Luebert is described as a new taxon. Two previously recognised species names, H. sclerocarpum Phil. and H. huascoense I. M. Johnst., are placed in the synonymy of H. chenopodiaceum (A. DC.) Clos and H. stenophyllum Hook. & Arn., respectively. One epitype, one neotype and one lectotype are designated here. VL - 68 SN - 0075-5974, 1874-933X UR - http://link.springer.com/article/10.1007/s12225-013-9432-6 IS - 1 JO - Kew Bull. ER - TY - JOUR T1 - Three new species of Heliotropium sect. Heliothamnus (Heliotropiaceae) from Peru JF - Phytotaxa Y1 - 2012 A1 - Federico Luebert A1 - M. Weigend SP - 35 EP - 44 VL - 49 JO - Phytotaxa ER - TY - JOUR T1 - Diversification in the Andes: Age and origins of South American Heliotropium lineages (Heliotropiaceae, Boraginales) JF - Molecular Phylogenetics and Evolution Y1 - 2011 A1 - Federico Luebert A1 - HH Hilger A1 - M. Weigend SP - 90 EP - 102 VL - 61 UR - http://dx.doi.org/10.1016/j.ympev.2011.06.001 IS - 1 JO - Mol. Phylogenet. Evol. ER - TY - JOUR T1 - Phylogenetic relationships and morphological diversity in Neotropical Heliotropium (Heliotropiaceae) JF - Taxon Y1 - 2011 A1 - Federico Luebert A1 - Grischa Brokamp A1 - Wen, J. A1 - M. Weigend A1 - HH Hilger SP - 663 EP - 680 VL - 60 UR - http://www.ingentaconnect.com/content/iapt/tax/2011/00000060/00000003/art00004 IS - 3 JO - Taxon ER - TY - JOUR T1 - Primer registro de Heliotropium amplexicaule (Heliotropiaceae) en Chile JF - Gayana Botánica Y1 - 2011 A1 - Ibáñez, S. A1 - Federico Luebert A1 - Gómez, M. SP - 89 EP - 92 VL - 68 UR - http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000100009 IS - 1 ER - TY - JOUR T1 - Epitypification of Heliotropium arborescens L. (Heliotropiaceae) JF - Taxon Y1 - 2010 A1 - Federico Luebert A1 - M. Weigend A1 - HH Hilger SP - 1263 EP - 1266 VL - 59 UR - http://www.ingentaconnect.com/content/iapt/tax/2010/00000059/00000004/art00023 IS - 4 ER - TY - JOUR T1 - Phylogenetic analysis and evolutionary diversification of Heliotropium sect. Cochranea (Heliotropiaceae) in the Atacama Desert JF - Systematic Botany Y1 - 2008 A1 - Federico Luebert A1 - Wen, J. SP - 390 EP - 402 VL - 33 UR - http://www.bioone.org/doi/abs/10.1600/036364408784571635 IS - 2 JO - Syst. Bot. ER - TY - JOUR T1 - Nota sobre la presencia de Heliotropium krauseanum Fedde (Heliotropiaceae) en Chile JF - Gayana Botánica Y1 - 2004 A1 - Federico Luebert A1 - Pinto, R. SP - 60 EP - 62 VL - 61 UR - http://dx.doi.org/10.4067/S0717-66432004000200003 IS - 2 N1 -

Cited By (since 1996): 2
Export Date: 10 December 2009

JO - Gayana Bot. ER - TY - JOUR T1 - Molecular delimitations in the Ehretiaceae (Boraginales) JF - Molecular Phylogenetics and Evolution Y1 - 2014 A1 - Marc Gottschling A1 - Federico Luebert A1 - HH Hilger A1 - James S. Miller SP - 1 EP - 6 AB - Major taxa of Ehretiaceae (including parasitic Lennoaceae) have not all been included in previous molecular phylogenetic analyses. As a result, the generic limits and their circumscriptions have not been satisfactorily resolved, despite its importance for floristic studies. To clarify which monophyletic groups can be recognized within the Ehretiaceae, sequences from one nuclear (ITS) and three plastid loci (rps16, trnL–trnF, trnS–trnG) were obtained from 67 accessions tentatively assigned to the Ehretiaceae (including 91 new GenBank entries) and covering the known diversity of the group. In phylogenetic analyses, Ehretiaceae were monophyletic when Lennoaceae were included and segregated into nine monophyletic lineages that correspond to accepted, morphologically distinct taxonomic units, namely Bourreria (s.l., paraphyletic in its current circumscription if not including Hilsenbergia), monotypic Cortesia, Ehretia (s.l., paraphyletic in its current circumscription if not including Carmona and Rotula), Halgania, monotypic Lennoa, Lepidocordia, Pholisma, Rochefortia, and Tiquilia. Bourreria and Ehretia have representatives in both the Old World and the New World, but all other taxa are restricted to the tropical and subtropical Americas (Cortesia, Lennoa, Lepidocordia, Pholisma, Rochefortia, Tiquilia) or Australia (Halgania). The historical biogeography of Ehretiaceae can be explained by few colonization events. The molecular trees are also discussed with respect to fruit evolution, where the fusion of endocarp parts may have taken place several times independently. VL - 72 SN - 1055-7903 UR - http://www.sciencedirect.com/science/article/pii/S1055790313004405 JO - Molecular Phylogenetics and Evolution ER - TY - JOUR T1 - From capsules to nutlets – Phylogenetic relationships in the Boraginales JF - Cladistics Y1 - 2014 DO - 10.1111/cla.12061 A1 - M. Weigend A1 - Federico Luebert A1 - Marc Gottschling A1 - Couvreur, T. L. P. A1 - HH Hilger A1 - James S. Miller SP - 508 EP - 518 VL - 30 UR - http://onlinelibrary.wiley.com/doi/10.1111/cla.12061/abstract IS - 5 JO - Cladistics ER -