Browsing by Author "Vidal, Rodrigo"

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    Characterization of new microsatellite markers derived from sequence databases for the emu (Dromaius novaehollandiae)
    (WILEY, 2008) Yanez, Jose M.; Gonzalez, Ruth; Angulo, Jenniffer; Vidal, Rodrigo; Santos, Jose L.; Martinez, Victor
    The emu (Dromaius novaehollandiae), a member of ratite family, is native to Australia and has been introduced to other countries worldwide. In this work, 10 polymorphic microsatellite loci were isolated and characterized for emu from public sequences. Polymorphism was surveyed in 22 individuals from two different populations kept in captivity. Between two and 11 alleles were found per locus, and the observed heterozygosity ranged from 0.05 to 0.85, in accordance with expectations. These markers will be useful as tools for detecting levels of genetic variation, reconstructing pedigrees (for quantitative genetic analysis) and identifying markers associated to fitness traits in emu populations.
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    Metal concentrations and source identification in Chilean public children's playgrounds
    (2018) Rodriguez-Oroz, Delia; Vidal, Rodrigo; Fernandoy, Francisco; Lambert, Fabrice; Quiero, Felipe
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    Phylogeography of the genus Spongites (Corallinales, Rhodophyta) from Chile
    (2008) Vidal, Rodrigo; Meneses, Isabel; Smith, Macarena
    Both the records and the descriptions of the crustose species of coralline algae on the southeastern coast of South America are from the early 1900s. Unlike other algae species on the coast of Chile, the biogeography and distribution of crustose corallines have not been studied despite their abundance. Through recent studies, it has been determined that the genus Spongites is the most conspicuous genus along the rocky intertidal of the Chilean coasts. It is also common to the entire coast of the Southern Hemisphere; however, the relationship between species and the possible reasons for their distribution is unknown. We used nuclear and mitochondrial genetic markers and SEM observations of morphological characters to examine Spongites samples from the Southern Hemisphere and to establish the phylogeographic relationships of Chilean Spongites with specimens from other southern coasts. The combination of these analyses revealed the following: (i) a monophyletic clade that represents the Chilean Spongites and (ii) a paraphyletic clade for South African, New Zealand, and Argentine samples. Consequently, we postulate two nonexclusive hypotheses regarding the relationship of Spongites species in the Southern Hemisphere: (i) a complex history of extinction, speciation, and recolonization that might have erased original Gondwanan split patterns, and (ii) an Antarctic Peninsula origin for the Chilean Spongites species.