Relationship of Hypochaeris salzmanniana (Asteraceae, Lactuceae), an endangered species of the Iberian Peninsula, to H. radicata and H. glabra and biogeographical implications
Identifieur interne : 000996 ( Main/Exploration ); précédent : 000995; suivant : 000997Relationship of Hypochaeris salzmanniana (Asteraceae, Lactuceae), an endangered species of the Iberian Peninsula, to H. radicata and H. glabra and biogeographical implications
Auteurs : Karin Tremetsberger [Autriche] ; Salvador Talavera [Espagne] ; Tod F. Stuessy [Autriche] ; Maria Ngeles Ortiz [Espagne] ; Hanna Weiss-Schneeweiss [Autriche] ; Gertrud Kadlec [Autriche]Source :
- Botanical Journal of the Linnean Society [ 0024-4074 ] ; 2004-09.
Descripteurs français
- Wicri :
- geographic : Espagne.
English descriptors
- KwdEn :
Abstract
Hypochaeris salzmanniana DC. (Asteraceae, Lactuceae) is an endangered species on the Iberian Peninsula, known from only eight coastal populations. Most authors have treated it as a variety, subspecies or simply as a synonym of H. glabra L. On the basis of morphological and cytological characters, Talavera recently separated H. salzmanniana (2n = 8) from H. glabra (2n = 10). Material of H. salzmanniana, H. glabra and H. radicata was collected from Spain, Italy, Sicily and Tunisia in order to assess taxonomic status and population relationships. Amplified Fragment Length Polymorphism (AFLP) analysis revealed three well‐differentiated species. A close relationship between H. salzmanniana and H. radicata is also confirmed by AFLP analysis and chromosome number (2n = 8), morphology, and rDNA localization (FISH, fluorescence in situ hybridization). Hypochaeris salzmanniana and H. radicata share three fixed diagnostic AFLP fragments out of 348 fragments scored. The population structure of H. salzmanniana reveals distinct groups in southern Spain that are separated geographically. High differentiation among a western (Conil to Zahara), an intermediate (Punta Paloma and Los Algarbes) and an eastern (Algeciras and La Línea) group may reflect ancient separation. Population sizes and genetic compatibility differ greatly among populations and can be used to explain levels of within‐population genetic diversity, together with recent documented loss of habitats resulting from tourist developments. Population structures of H. radicata and H. glabra show a similar geographical patterning: strongly differentiated populations from the Betic Cordillera and from the Iberian Massif, which are separated at present by the Guadalquivir river. Geological events at the end of the Tertiary (Tortonian–Messinian Miocene) might help explain patterns of differentiation in these three species of sect. Hypochaeris. © 2004 The Linnean Society of London, Botanical Journal of the Linnean Society, 2004, 146, 79–95.
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DOI: 10.1111/j.1095-8339.2004.00304.x
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(Asteraceae, Lactuceae) is an endangered species on the Iberian Peninsula, known from only eight coastal populations. Most authors have treated it as a variety, subspecies or simply as a synonym of H. glabra L. On the basis of morphological and cytological characters, Talavera recently separated H. salzmanniana (2n = 8) from H. glabra (2n = 10). Material of H. salzmanniana, H. glabra and H. radicata was collected from Spain, Italy, Sicily and Tunisia in order to assess taxonomic status and population relationships. Amplified Fragment Length Polymorphism (AFLP) analysis revealed three well‐differentiated species. A close relationship between H. salzmanniana and H. radicata is also confirmed by AFLP analysis and chromosome number (2n = 8), morphology, and rDNA localization (FISH, fluorescence in situ hybridization). Hypochaeris salzmanniana and H. radicata share three fixed diagnostic AFLP fragments out of 348 fragments scored. The population structure of H. salzmanniana reveals distinct groups in southern Spain that are separated geographically. High differentiation among a western (Conil to Zahara), an intermediate (Punta Paloma and Los Algarbes) and an eastern (Algeciras and La Línea) group may reflect ancient separation. Population sizes and genetic compatibility differ greatly among populations and can be used to explain levels of within‐population genetic diversity, together with recent documented loss of habitats resulting from tourist developments. Population structures of H. radicata and H. glabra show a similar geographical patterning: strongly differentiated populations from the Betic Cordillera and from the Iberian Massif, which are separated at present by the Guadalquivir river. Geological events at the end of the Tertiary (Tortonian–Messinian Miocene) might help explain patterns of differentiation in these three species of sect. Hypochaeris. © 2004 The Linnean Society of London, Botanical Journal of the Linnean Society, 2004, 146, 79–95.</div></front></TEI><affiliations><list><country><li>Autriche</li><li>Espagne</li></country><region><li>Andalousie</li></region></list><tree><country name="Autriche"><noRegion><name sortKey="Tremetsberger, Karin" sort="Tremetsberger, Karin" uniqKey="Tremetsberger K" first="Karin" last="Tremetsberger">Karin Tremetsberger</name></noRegion><name sortKey="Kadlec, Gertrud" sort="Kadlec, Gertrud" uniqKey="Kadlec G" first="Gertrud" last="Kadlec">Gertrud Kadlec</name><name sortKey="Stuessy, Tod F" sort="Stuessy, Tod F" uniqKey="Stuessy T" first="Tod F." last="Stuessy">Tod F. Stuessy</name><name sortKey="Weiss Chneeweiss, Hanna" sort="Weiss Chneeweiss, Hanna" uniqKey="Weiss Chneeweiss H" first="Hanna" last="Weiss-Schneeweiss">Hanna Weiss-Schneeweiss</name></country><country name="Espagne"><region name="Andalousie"><name sortKey="Talavera, Salvador" sort="Talavera, Salvador" uniqKey="Talavera S" first="Salvador" last="Talavera">Salvador Talavera</name></region><name sortKey="Ortiz, Maria Ngeles" sort="Ortiz, Maria Ngeles" uniqKey="Ortiz M" first="Maria Ngeles" last="Ortiz">Maria Ngeles Ortiz</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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