Molecular Phylogenetics of the Caribbean Genera <i>Rhodogeron</i> and <i>Sachsia</i> (Asteraceae)

Hong, Liu; Trusty, Jennifer L.; Oviedo, Ramona; Anderberg, Arne A.; Francisco‐Ortega, Javier

doi:10.1086/380746

Cited by 17 publications

(19 citation statements)

References 33 publications

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“…In our review we have also shown that, although there is a paucity of molecular systematic studies for the Antillean sunflowers, the Asteraceae provide useful insights concerning historical biogeography of the West Indies through the analyses of geographical areas, as shown by the studies of Gochnatia by Pérez and Ventosa, (2002) and of Sachsia by Liu et al, (2004). In addition, results from molecular cladistic studies have revealed sister group relationships which are significant at a global scale, as shown by Feddea (Cariaga et al, 2008).…”

Section: Conclusion Global Biodiversity Perspectives and Future DImentioning

confidence: 82%

“…For instance a molecular cladistic study for Sachsia includes reconstructions of ancestral stages for ecological traits and reveals a dispersal route from the high elevation serpentine mountains of Cuba toward the limestone areas of the Bahamas and South Florida (Liu et al, 2004). These low elevation areas were covered by the ocean approximately 125,000 years ago (Scott, 1997), and it is likely that many of the endemics from this region have a relatively recent origin.…”

Section: Molecular Cladistic Studiesmentioning

confidence: 99%

“…It is clear from the analysis of the different groups within the Asteraceae and from other papers in this volume that the notion of a vicariance explanation (Rosen, 1976;Nelson & Platnick, 1981) for all taxa is unwarranted. For example, in the case of Sachsia a colonization route from Cuba to Florida can be inferred from the phylogeny and the fact that Florida and Cuba have never been joined, therefore a dispersal scenario is the only feasible one for this group (Liu et al, 2004). It would appear that each taxon has its own history, and dispersal versus vicariance must be ascertained in each case .…”

Section: Conclusion Global Biodiversity Perspectives and Future DImentioning

confidence: 99%

“…There is no comprehensive red list for the Antillean plants, however; based on our own field experience and information reported by Borhidi and Muñiz (1983), Kelly (1988), Herrera et al (1999), Rankin and Areces (2003), Jiménez et al (2004), Liu et al (2004), Berazaín et al (2005), and Cariaga et al (2008) we believe that the following 14 endemic genera, Antillia, Ciceronia, Ekmaniopappus, Feddea, Harnackia, Herodotia, Herreranthus, Ignurbia, Lescaillea, Rhodogeron, Salcedoa, Shafera, Tetraperone, and Thymopsis are highly threatened and likely to be included within the Critically Endangered category of the World Conservation Union (IUCN, 2001). Two of the endemic genera are endemic to Haiti, Mattfeldia and Osmiopsis, and their conservation status is uncertain.…”

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confidence: 99%

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Caribbean Island Asteraceae: Systematics, Molecules, and Conservation on a Biodiversity Hotspot

et al. 2008

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The Caribbean Islands are one of the ten insular biodiversity hotspots that are defined based on endemicity, massive habitat loss and vulnerability to extinction. Asteraceae genera endemic to islands have provided well known examples of plant radiation worldwide and illustrate the importance of these insular systems for evolutionary and conservation studies. A review of known patterns of taxonomic diversity and molecular cladistics is provided for Asteraceae genera and species endemic in the Caribbean Island biodiversity hotspot. We found that when compared with other island systems worldwide the Caribbean Islands have the highest number of endemic genera (41), have endemic genera in the highest number of tribes, and harbor the only Asteraceae tribe endemic to an island system, the Feddeeae which is restricted to Cuba. These unique patterns identify the Caribbean Islands as the most important insular area of endemism for this major plant family. Molecular cladistic studies are limited to only seven species in seven endemic genera and six endemic species in five non-endemic genera. These few studies are however relevant as: (1) they confirm the tribal status of the Feddeeae, (2) suggest colonization events from the highlands of Cuba toward low elevation and geologically recent areas of the Bahamas and South Florida, (3) provide evidence for biogeographical links to remote regions of the Pacific Basin, and (4) identify sister relationships with continental taxa, mostly from North America.Resumen Las Islas del Caribe son uno de los diez "punto calientes" insulares de biodiversidad, los cuales vienen definidos por sus niveles de endemicidad, masiva pérdida de habitat y vulnerabilidad y extinción. Asteráceas endémicas de islas han proporcionado ejemplos muy bien conocidos de radiación vegetal a nivel mundial, éstos ilustran la importancia de los sistemas insulares en estudios evolutivos y de conservación. Se presenta una revisión de las pautas de diversidad taxonómica y de

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Section: Conclusion Global Biodiversity Perspectives and Future DImentioning

confidence: 82%

Section: Molecular Cladistic Studiesmentioning

confidence: 99%

Section: Conclusion Global Biodiversity Perspectives and Future DImentioning

confidence: 99%

mentioning

confidence: 99%

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Caribbean Island Asteraceae: Systematics, Molecules, and Conservation on a Biodiversity Hotspot

et al. 2008

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“…Several molecular phylogenies have included West Indian endemics that are restricted to serpentine soils (e.g., McDowell & Bremer, 1998, McDowell et al, 2003Lavin et al, 2001;Loockerman et al, 2003;Liu et al, 2004;Namoff et al, 2007;Cariaga et al, 2008;Michelangeli et al, 2008, pers. comm.…”

Section: Ancestral Area Analysismentioning

confidence: 99%

Phylogenetics, Conservation, and Historical Biogeography of the West Indian Members of the Adelieae (Euphorbiaceae)

Jestrow¹

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The Caribbean Island Biodiversity Hotspot is the largest insular system of the New World and a priority for biodiversity conservation worldwide. The tribe Adeliae (Euphorbiaceae) has over 35 species endemic to this hotspot, representing one of the most extraordinary cases of speciation in the West Indies, involving taxa from Cuba, Hispaniola, Jamaica, and the Bahamas. These species form a monophyletic group and traditionally have been accommodated in two endemic genera: Lasiocroton and Leucocroton. A study based on: (1) scanning electron microscopy of pollen and trichomes, (2) macromorphology, and (3) molecular data, was conducted to reveal generic relationships within this group. Phylogenies were based on parsimony and Bayesian analyses of nucleotide sequences of the ITS regions of the nuclear ribosomal DNA and the non-coding chloroplast DNA spacers psbM-trnD and ycf6-pcbM. One species, Lasiocroton trelawniensis, was transferred from the tribe into the genus Bernardia. Of the remaining species, three major monophyletic assemblages were revealed, one was restricted to limestone ares of Hispaniola and was sister to a clade with two monophyletic genera, Lasiocroton and Leucocroton. Morphological, vi biogeographical, and ecological data provided additional support for each of these three monophyletic assemblages. The Hispaniolan taxa were accommodated in a new genus with four species: Garciadelia. Leucocroton includes the nickel hyperaccumulating species from serpentine soils of Cuba, while the rest of the species were placed in Lasiocroton, a genus restricted to limestone areas. The geographic history of the islands as well as the phylogenetic placement of the Leucocroton-alliance, allows the research to include the historical biogeography of the alliance across the islands of the Caribbean based on a dispersal-vicariance analysis.

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Generic delineation, phylogeny and subtribal affinities of Phagnalon and Aliella (Compositae, Gnaphalieae) based on nuclear and chloroplast sequences

Montes-Moreno

Sáez

Benedí

et al. 2010

TAXON

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The precise generic delimitation of Aliella and Phagnalon and their tribal affinities are at present unresolved. The main goals of our study were to verify the monophyly of these two genera and to determine their closest affinity group within Gnaphalieae. We analysed sequences of the trnL intron and trnL‐trnF spacer of Gnaphalieae and other Compositae tribes, in order to elucidate the tribal position of Aliella, Macowania, Phagnalon and Philyrophyllum. In addition, we analysed ribosomal nrDNA together with the ycf3‐trnS and trnT‐trnL spacers of cpDNA to elucidate the relationships within Aliella and Phagnalon. The genera Anisothrix, Athrixia and Pentatrichia are closely related to Aliella and Phagnalon. Aliella, Macowania and Phagnalon are nested within the "Relhania clade", and the subtribal affinities of Philyrophyllum lie within the "crown radiation clade". The monophyly of Aliella and Phagnalon is not supported statistically and Aliella is paraphylethic in most of the analyses. The resulting phylogeny suggests an African origin for Aliella and Phagnalon and identifies three main clades in Phagnalon, the Irano‐Turanian clade, the Mediterranean‐Macaronesian clade and the Yemenite‐Ethiopian clade. Some endemics to Yemen and Ethiopia are resolved in the Mediterranean‐Macaronesian clade, providing new evidence of phytogeographical links between Macaronesia, Eastern Africa and Southern Arabia. Incongruence between the chloroplast and nuclear molecular data and the lack of resolution in some clades may indicate that hybridization could have played an important role in the evolution and diversification of Phagnalon and Aliella.

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Molecular Phylogenetics of the Caribbean Genera Rhodogeron and Sachsia (Asteraceae)

Cited by 17 publications

References 33 publications

Caribbean Island Asteraceae: Systematics, Molecules, and Conservation on a Biodiversity Hotspot

Caribbean Island Asteraceae: Systematics, Molecules, and Conservation on a Biodiversity Hotspot

Phylogenetics, Conservation, and Historical Biogeography of the West Indian Members of the Adelieae (Euphorbiaceae)

Generic delineation, phylogeny and subtribal affinities of Phagnalon and Aliella (Compositae, Gnaphalieae) based on nuclear and chloroplast sequences

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