Tracing the colonization of Madeira and the Canary Islands by Drosophila subobscura through the study of the rp49 gene region

Khadem, M.; Rozas, J.; Segarra, C.; Brehm, A.; Aguade, M.

http://hdl.handle.net/10400.13/3719

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Abstract(s)

been analysed by fine restriction mapping in a sample of 47 lines from a population from Madeira. Five restriction-site (out of 37 sites scored) and 3 length polymor phisms have been detected, resulting in 14 different haplotypes. This population shows less variation than both continental and Canary Island populations. The population from Madeira shows some differentiation from mainland populations, which does not favor the idea of extensive migration between the continent and Madeira. Chromosomal and restriction-map variation of the rp49 region in D. subobscuru populations, together with data on sequence comparison of this nuclear region in D. guanche and D. mudeirensis clearly indicate that the Canary Islands underwent at least two colonization events from the nearby continent. Although the data for Madeira are compatible with a single colonization event by a continental sample polymorphic for gene arrangements 0, and 0, + 4, an alternative scenario with at least two colonization events seems more likely.

Keywords

Drosophilu suhohscuru species cluster rp49 gene region Colonization Canary Islands (Spain) Madeira (Portugal) . Faculdade de Ciências da Vida

URI

http://hdl.handle.net/10400.13/3719

Citation

Khadem, M., Rozas, J., Segarra, C., Brehm, A., & Aguadé, M. (1998). Tracing the colonization of Madeira and the Canary Islands by Drosophila subobscura through the study of the rp49 gene region. Journal of Evolutionary Biology, 11(4), 439-452. https://doi.org/10.1046/j.1420-9101.1998.11040439.x