Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.13/1394
Título: Genetic diversity of the Macaronesian leafy liverwort Porella canariensis inferred from RAPD markers
Autor: Spínola, Hélder
Brehm, António
Palavras-chave: Macaronesian Leafy Liverwort Porella canariensis
.
Faculdade de Ciências da Vida
Data: 2001
Editora: Oxford University Press
Citação: Spínola, H., & Brehm, A. (2001). Genetic diversity of the Macaronesian leafy liverwort Porella canariensis inferred from RAPD markers. Journal of Heredity, 92(4), 339-345.
Resumo: Plant colonization of the North Atlantic raises the intriguing question of the relationships between extant island species with their continental counterparts (European, African, and American), which may provide clues to past geographic distribution and colonization history. It has been suggested that during past glaciations, many plant species with typical Mediterranean distributions survived in the Atlantic islands that belong to what is today known as Macronesia. We used random amplified polymorphic DNA (RAPD) markers to study 12 populations of the liverwort Porella canariensis partly covering its present-day distribution (Azores, Madeira, Canary and Cape Verde Islands, and Iberian Peninsula). Unweighted pairgroup (UPGMA) and principal component (PCO) analyses showed a similar geographical pattern that suggested a close relationship between Iberian populations and those from the Canaries and Cape Verde Islands. Populations from Madeira had more genetic variation than those from the Azores, a result from either a richer diversity of habitats in Madeira, which prompted more population diversification, successive colonization waves from different origins, or an older colonization of Madeira. The data show that continuous patches of liverworts are often comprised of more than one individual. Finally, RAPDs can be used to investigate intraspecific diversity within a comparatively large geographic area and, with utmost care, can be used to infer a historic context to explain the patterns observed.
URI: http://hdl.handle.net/10400.13/1394
ISSN: 0022-1503
Aparece nas colecções:Artigos em revistas internacionais

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