Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/78027
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Geographical Distribution of Diploid and Tetraploid Cytotypes of Thymus sect. Mastichina (Lamiaceae) in the Iberian Peninsula, Genome Size and Evolutionary Implications |
Autor: | Girón, Verónica; Garnatje, Teresa CSIC ORCID ; Pérez-Collazos, Ernesto; Catalán, Pilar; Valdés, B. | Palabras clave: | Chromosome numbers Endemism Flow cytometry Genome evolution Karyology Ploidy level |
Fecha de publicación: | 2012 | Editor: | Czech Academy of Sciences | Citación: | Folia Geobotanica 47: 441- 460 (2012) | Resumen: | The occurrence of diploid and tetraploid cytotypes in Thymus section Mastichina (Lamiaceae) was investigated by chromosome counting and flow cytometric measurements of DNA content. To cover the entire native distribution of the section across the Iberian Peninsula, plant material was sampled from 29 populations, representing all three taxa (Thymus albicans, T. mastichina subsp. mastichina and T. mastichina subsp. donyanae). We provide first estimates of genome size for taxa of this section. Analyses revealed the existence of new cytotypes in T. mastichina subsp. mastichina (2n = 2x = 28, 30) and confirmed the existence of previous ones (2n = 4x = 56, 58, 60). We also confirmed the presence of exclusively diploid cytotypes (2n = 2x = 30) in the southwestern Iberian endemics T. albicans and T. mastichina subsp. donyanae. We conclude that the southwestern Iberian Peninsula acted as a Pleistocene glacial refugium that may have permitted speciation processes within this section. Several hypotheses concerning these processes and the origin and distribution of the studied taxa are discussed. | URI: | http://hdl.handle.net/10261/78027 | DOI: | 10.1007/S12224-012-9126-0 | ISSN: | 1211-9520 |
Aparece en las colecciones: | (IBB) Artículos |
Mostrar el registro completo
CORE Recommender
WEB OF SCIENCETM
Citations
8
checked on 26-feb-2024
Page view(s)
331
checked on 14-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.