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Contrasted levels of genetic diversity in a benthic Mediterranean octocoral: Consequences of different demographic histories? ArchiMer
Masmoudi, Moutassem Billah; Chaoui, Lamya; Topu, Nur Eda; Hammami, Pachka; Kara, Mohamed Hichem; Aurelle, Didier.
Understanding the factors explaining the observed patterns of genetic diversity is an important question in evolutionary biology. We provide the first data on the genetic structure of a Mediterranean octocoral, the yellow gorgonian Eunicella cavolini, along with insights into the demographic history of this species. We sampled populations in four areas of the Mediterranean Sea: continental France, Algeria, Turkey, and the Balearic and Corsica islands. Along French coasts, three sites were sampled at two depths (20 and 40 m). We demonstrated a high genetic structure in this species (overall F-ST = 0.13), and most pairwise differentiation tests were significant. We did not detect any difference between depths at the same site. Clustering analyses revealed...
Tipo: Text Palavras-chave: Octocoral; Conservation Genetics; Demographic history; Mediterranean Sea; Eunicella cavolini; Microsatellite.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00375/48587/48919.pdf
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Evidences of delayed size recovery in Araucaria angustifolia populations after post-glacial colonization of highlands in Southeastern Brazil Anais da ABC (AABC)
Stefenon,Valdir M.; Behling,Hermann; Gailing,Oliver; Finkeldey,Reiner.
Up to date, little is known about the relationship between historical demography and the current genetic structure of A. Angus As a first effort towards overcoming this lack, microsatellite data scored in six populations and isozyme allele frequencies published for 11 natural stands of this species were analysed in order to assess molecular signatures of populations' demographic history. Signatures of genetic bottlenecks were captured in all analysed populations of southeastern Brazil. Among southern populations, signatures of small effective population size were observed in only three out of 13 populations. Southern populations likely experienced faster recovery of population size after migration onto highlands. Accordingly, current genetic diversity of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araucaria angustifolia; Genetic bottleneck; Population size recovery; Demographic history; Climate dynamics; Paleobotany.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300005
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