Please use this identifier to cite or link to this item:
Title: Evolution and conservation genetics of an insular hemiparasitic plant lineage at the limit of survival: the case of Thesium sect. Kunkeliella in the Canary Islands
Authors: Rodríguez Rodríguez, Priscila 
de Castro, AGF
Pérez de Paz, P
Curbelo Muñoz, Leticia 
Palomares, A
Mesa, R
Acevedo, A
Sosa Henríquez, Pedro Antonio 
UNESCO Clasification: 2417 Biología vegetal (botánica)
241714 Genética vegetal
Keywords: Endangered species
Insular radiation
Niche conservatism, et al
Issue Date: 2022
Journal: American journal of botany 
Abstract: Premise: The diversification of island flora has been widely studied. However, the role of environmental niches in insular radiation processes has been less investigated. We combined population genetic analyses with species distribution modelling to clarify the genetic relationships, diversification patterns, species niche requirements, and conservation of Thesium sect. Kunkeliella, a clade of rare hemiparasitic plants endemic to the Canaries. Methods: We studied the three extant Thesium species and a new taxon from La Palma Island. We developed 12 microsatellites and performed population genetic analysis and studied the demographic history of the group. To evaluate the role of niche conservatism in the diversification of the group, we performed species distribution modelling (ESM) with four algorithms. Results: All species presented moderate genetic diversity values for rare endemics. Thesium canariense (Gran Canaria) showed high differentiation, whereas T. subsucculentum, T. retamoides (Tenerife), and La Palma populations are closely related. The lineage may have undergone a recent diversification with colonization proceeding east to west, with T. canariense as sister to the others. We detected a climatic niche shift, as taxa showed different distributions across the temperature gradient. There is enough evidence to describe La Palma populations as a new species. Conclusions: We characterized the evolutionary history of Thesium sect. Kunkeliella by integrating genetic and ecological assessments. Our results indicate that this clade has undergone a recent radiation process with niche differentiation among species. The results increase our knowledge about insular radiations and will inform the conservation management of the study species.
ISSN: 0002-9122
DOI: 10.1002/ajb2.1830
Source: American Journal of Botany [ISSN 0002-9122], v. 109(3), p. 419-436
Appears in Collections:Artículos
Adobe PDF (2,36 MB)
Show full item record

Google ScholarTM




Export metadata

Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.