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The Genetic structure of the remnant populations of Centaurea horrida in Sardinia and associated islands

Mameli, Giulia and Filigheddu, Rossella Speranza and Binelli, Giorgio and Meloni, Marilena (2008) The Genetic structure of the remnant populations of Centaurea horrida in Sardinia and associated islands. Annals of Botany, Vol. 101 (5), p. 633-640. eISSN 1095-8290. Article.

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DOI: 10.1093/aob/mcn012


Background and Aims: The Mediterranean region is of prime importance to biodiversity at a global level, mainly due to the abundance of endemic plant species. However, information about these species is still scarce, especially at the genetic level. In this paper the first assessment is reported of the genetic structure of Centaurea horrida (Asteraceae), an endemic, sea-cliff-dwelling plant from Sardinia. Methods: The study was conducted on seven populations covering the entire natural range of the species by means of SSR (microsatellite) markers. Key Results: A considerable amount of genetic variation was found (average He = 0•603–0•854), together with a medium-high differentiation among populations, as estimated both by FST (0•123) and RST (0•158). Both Bayesian analysis and AMOVA were employed to detect genetic structuring in this species. The results suggest that the origins of the current populations of C. horrida lie in two gene pools. Conclusions: Despite the restricted range, C. horrida displays high levels of genetic diversity, structured in such a way that three management units could be deemed viable for its conservation. The protected status of the species will probably suffice to prevent the impoverishment of its genetic resources.

Item Type:Article
ID Code:592
Uncontrolled Keywords:Genetic diversity, Centaurea horrida, endangered species, narrow endemic, conservation, Mediterranean, Sardinia
Subjects:Area 05 - Scienze biologiche > BIO/03 Botanica ambientale e applicata
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Oxford University Press on behalf of the Annals of Botany Company
Copyright Holders:© The Author 2008
Deposited On:18 Aug 2009 10:02

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