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Testing the divergence-with-gene flow model of ecological speciation in two species of andean hummingbirds

RISMendeley
URI: http://hdl.handle.net/1992/11162
Author: García Rivadeneira, Silvana
Director(s)/Advisor(s): Cadena Ordónez, Carlos DanielUniandes authority
Publication date: 2010
Content type: masterThesis
Keywords:
Flujo génico - Investigaciones - Colombia
Genética de población - Investigaciones - Colombia
Colibríes - Investigaciones - Colombia
Abstract:
The divergence-with-gene-flow model of ecological speciation proposes speciation can proceed despite genetic interchange in populations distributed along environment al gradients, where variable selective regimes act on traits ultimately associated with reproductive isolation. Despite ample evidence for population divergence with gen e flow, studies showing that species-level differences arose in the face of gene flow and assessing the environmental and genetic factors promoting differentiation are scarce. Coeligena helianthea and C. bonapartei are two parapatrically distributed Andean hummingbird sister species that represent a good opportunity to evaluate this mode of speciation because they exhibit high ( and potentially adaptive) phenotypic divergence with low levels of genetic differentiation.
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